/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2001 Havoc Pennington
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
/*
* SECTION:theme
* @title: MetaTheme
* @short_description: Metacity Theme Rendering
*
* The window decorations drawn by Metacity are described by files on disk
* known internally as "themes" (externally as "window border themes" on
* http://art.gnome.org/themes/metacity/ or "Metacity themes"). This file
* contains most of the code necessary to support themes; it does not
* contain the XML parser, which is in theme-parser.c.
*/
/*
* FIXME: This is a big file with lots of different subsystems, which might
* be better split out into separate files.
*/
#include
#include "theme-private.h"
#include "frames.h" /* for META_TYPE_FRAMES */
#include "util-private.h"
#include
#include
#include
#include
#include
#include
#define GDK_COLOR_RGBA(color) \
((guint32) (0xff | \
((int)((color).red * 255) << 24) | \
((int)((color).green * 255) << 16) | \
((int)((color).blue * 255) << 8)))
#define GDK_COLOR_RGB(color) \
((guint32) (((int)((color).red * 255) << 16) | \
((int)((color).green * 255) << 8) | \
((int)((color).blue * 255))))
#define DEBUG_FILL_STRUCT(s) memset ((s), 0xef, sizeof (*(s)))
#define CLAMP_UCHAR(v) ((guchar) (CLAMP (((int)v), (int)0, (int)255)))
#define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
static void gtk_style_shade (GdkRGBA *a,
GdkRGBA *b,
gdouble k);
static void rgb_to_hls (gdouble *r,
gdouble *g,
gdouble *b);
static void hls_to_rgb (gdouble *h,
gdouble *l,
gdouble *s);
/*
* The current theme. (Themes are singleton.)
*/
static MetaTheme *meta_current_theme = NULL;
static void
color_composite (const GdkRGBA *bg,
const GdkRGBA *fg,
double alpha,
GdkRGBA *color)
{
*color = *bg;
color->red = color->red + (fg->red - color->red) * alpha;
color->green = color->green + (fg->green - color->green) * alpha;
color->blue = color->blue + (fg->blue - color->blue) * alpha;
color->alpha = color->alpha + (fg->alpha - color->alpha) * alpha;
}
/**
* init_border:
* @border: The border whose fields should be reset.
*
* Sets all the fields of a border to dummy values.
*/
static void
init_border (GtkBorder *border)
{
border->top = -1;
border->bottom = -1;
border->left = -1;
border->right = -1;
}
/**
* meta_frame_layout_new: (skip)
*
* Creates a new, empty MetaFrameLayout. The fields will be set to dummy
* values.
*
* Returns: The newly created MetaFrameLayout.
*/
MetaFrameLayout*
meta_frame_layout_new (void)
{
MetaFrameLayout *layout;
layout = g_new0 (MetaFrameLayout, 1);
layout->refcount = 1;
/* Fill with -1 values to detect invalid themes */
layout->left_width = -1;
layout->right_width = -1;
layout->bottom_height = -1;
init_border (&layout->title_border);
layout->title_vertical_pad = -1;
layout->right_titlebar_edge = -1;
layout->left_titlebar_edge = -1;
layout->button_sizing = META_BUTTON_SIZING_LAST;
layout->button_aspect = 1.0;
layout->button_width = -1;
layout->button_height = -1;
/* Spacing as hardcoded in GTK+:
* https://git.gnome.org/browse/gtk+/tree/gtk/gtkheaderbar.c?h=gtk-3-14#n53
*/
layout->titlebar_spacing = 6;
layout->has_title = TRUE;
layout->title_scale = 1.0;
init_border (&layout->button_border);
return layout;
}
static gboolean
validate_border (const GtkBorder *border,
const char **bad)
{
*bad = NULL;
if (border->top < 0)
*bad = _("top");
else if (border->bottom < 0)
*bad = _("bottom");
else if (border->left < 0)
*bad = _("left");
else if (border->right < 0)
*bad = _("right");
return *bad == NULL;
}
/**
* validate_geometry_value:
* @val: The value to check
* @name: The name to use in the error message
* @error: (out): Set to an error if val was not initialised
*
* Ensures that the theme supplied a particular dimension. When a
* #MetaFrameLayout is created, all its integer fields are set to -1
* by meta_frame_layout_new(). After an instance of this type
* should have been initialised, this function checks that
* a given field is not still at -1. It is never called directly, but
* rather via the %CHECK_GEOMETRY_VALUE and %CHECK_GEOMETRY_BORDER
* macros.
*/
static gboolean
validate_geometry_value (int val,
const char *name,
GError **error)
{
if (val < 0)
{
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FRAME_GEOMETRY,
_("frame geometry does not specify \"%s\" dimension"),
name);
return FALSE;
}
else
return TRUE;
}
static gboolean
validate_geometry_border (const GtkBorder *border,
const char *name,
GError **error)
{
const char *bad;
if (!validate_border (border, &bad))
{
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FRAME_GEOMETRY,
_("frame geometry does not specify dimension \"%s\" for border \"%s\""),
bad, name);
return FALSE;
}
else
return TRUE;
}
gboolean
meta_frame_layout_validate (const MetaFrameLayout *layout,
GError **error)
{
g_return_val_if_fail (layout != NULL, FALSE);
#define CHECK_GEOMETRY_VALUE(vname) if (!validate_geometry_value (layout->vname, #vname, error)) return FALSE
#define CHECK_GEOMETRY_BORDER(bname) if (!validate_geometry_border (&layout->bname, #bname, error)) return FALSE
CHECK_GEOMETRY_VALUE (left_width);
CHECK_GEOMETRY_VALUE (right_width);
CHECK_GEOMETRY_VALUE (bottom_height);
CHECK_GEOMETRY_BORDER (title_border);
CHECK_GEOMETRY_VALUE (title_vertical_pad);
CHECK_GEOMETRY_VALUE (right_titlebar_edge);
CHECK_GEOMETRY_VALUE (left_titlebar_edge);
switch (layout->button_sizing)
{
case META_BUTTON_SIZING_ASPECT:
if (layout->button_aspect < (0.1) ||
layout->button_aspect > (15.0))
{
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FRAME_GEOMETRY,
_("Button aspect ratio %g is not reasonable"),
layout->button_aspect);
return FALSE;
}
break;
case META_BUTTON_SIZING_FIXED:
CHECK_GEOMETRY_VALUE (button_width);
CHECK_GEOMETRY_VALUE (button_height);
break;
case META_BUTTON_SIZING_LAST:
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FRAME_GEOMETRY,
_("Frame geometry does not specify size of buttons"));
return FALSE;
}
CHECK_GEOMETRY_BORDER (button_border);
return TRUE;
}
MetaFrameLayout*
meta_frame_layout_copy (const MetaFrameLayout *src)
{
MetaFrameLayout *layout;
layout = g_new0 (MetaFrameLayout, 1);
*layout = *src;
layout->refcount = 1;
return layout;
}
void
meta_frame_layout_ref (MetaFrameLayout *layout)
{
g_return_if_fail (layout != NULL);
layout->refcount += 1;
}
void
meta_frame_layout_unref (MetaFrameLayout *layout)
{
g_return_if_fail (layout != NULL);
g_return_if_fail (layout->refcount > 0);
layout->refcount -= 1;
if (layout->refcount == 0)
{
DEBUG_FILL_STRUCT (layout);
g_free (layout);
}
}
void
meta_frame_layout_get_borders (const MetaFrameLayout *layout,
int text_height,
MetaFrameFlags flags,
MetaFrameType type,
MetaFrameBorders *borders)
{
int buttons_height, title_height, draggable_borders;
meta_frame_borders_clear (borders);
/* For a full-screen window, we don't have any borders, visible or not. */
if (flags & META_FRAME_FULLSCREEN)
return;
g_return_if_fail (layout != NULL);
if (!layout->has_title)
text_height = 0;
buttons_height = layout->button_height +
layout->button_border.top + layout->button_border.bottom;
title_height = text_height +
layout->title_vertical_pad +
layout->title_border.top + layout->title_border.bottom;
borders->visible.top = MAX (buttons_height, title_height);
borders->visible.left = layout->left_width;
borders->visible.right = layout->right_width;
borders->visible.bottom = layout->bottom_height;
draggable_borders = meta_prefs_get_draggable_border_width ();
if (flags & META_FRAME_ALLOWS_HORIZONTAL_RESIZE)
{
borders->invisible.left = MAX (0, draggable_borders - borders->visible.left);
borders->invisible.right = MAX (0, draggable_borders - borders->visible.right);
}
if (flags & META_FRAME_ALLOWS_VERTICAL_RESIZE)
{
borders->invisible.bottom = MAX (0, draggable_borders - borders->visible.bottom);
/* borders.visible.top is the height of the *title bar*. We can't do the same
* algorithm here, titlebars are expectedly much bigger. Just subtract a couple
* pixels to get a proper feel. */
if (type != META_FRAME_TYPE_ATTACHED)
borders->invisible.top = MAX (0, draggable_borders - 2);
}
borders->total.left = borders->invisible.left + borders->visible.left;
borders->total.right = borders->invisible.right + borders->visible.right;
borders->total.bottom = borders->invisible.bottom + borders->visible.bottom;
borders->total.top = borders->invisible.top + borders->visible.top;
}
static MetaButtonType
map_button_function_to_type (MetaButtonFunction function)
{
switch (function)
{
case META_BUTTON_FUNCTION_SHADE:
return META_BUTTON_TYPE_SHADE;
case META_BUTTON_FUNCTION_ABOVE:
return META_BUTTON_TYPE_ABOVE;
case META_BUTTON_FUNCTION_STICK:
return META_BUTTON_TYPE_STICK;
case META_BUTTON_FUNCTION_UNSHADE:
return META_BUTTON_TYPE_UNSHADE;
case META_BUTTON_FUNCTION_UNABOVE:
return META_BUTTON_TYPE_UNABOVE;
case META_BUTTON_FUNCTION_UNSTICK:
return META_BUTTON_TYPE_UNSTICK;
case META_BUTTON_FUNCTION_MENU:
return META_BUTTON_TYPE_MENU;
case META_BUTTON_FUNCTION_APPMENU:
return META_BUTTON_TYPE_APPMENU;
case META_BUTTON_FUNCTION_MINIMIZE:
return META_BUTTON_TYPE_MINIMIZE;
case META_BUTTON_FUNCTION_MAXIMIZE:
return META_BUTTON_TYPE_MAXIMIZE;
case META_BUTTON_FUNCTION_CLOSE:
return META_BUTTON_TYPE_CLOSE;
case META_BUTTON_FUNCTION_LAST:
return META_BUTTON_TYPE_LAST;
}
return META_BUTTON_TYPE_LAST;
}
static MetaButtonSpace*
rect_for_function (MetaFrameGeometry *fgeom,
MetaFrameFlags flags,
MetaButtonFunction function,
MetaTheme *theme)
{
/* Firstly, check version-specific things. */
if (META_THEME_ALLOWS(theme, META_THEME_SHADE_STICK_ABOVE_BUTTONS))
{
switch (function)
{
case META_BUTTON_FUNCTION_SHADE:
if ((flags & META_FRAME_ALLOWS_SHADE) && !(flags & META_FRAME_SHADED))
return &fgeom->shade_rect;
else
return NULL;
case META_BUTTON_FUNCTION_ABOVE:
if (!(flags & META_FRAME_ABOVE))
return &fgeom->above_rect;
else
return NULL;
case META_BUTTON_FUNCTION_STICK:
if (!(flags & META_FRAME_STUCK))
return &fgeom->stick_rect;
else
return NULL;
case META_BUTTON_FUNCTION_UNSHADE:
if ((flags & META_FRAME_ALLOWS_SHADE) && (flags & META_FRAME_SHADED))
return &fgeom->unshade_rect;
else
return NULL;
case META_BUTTON_FUNCTION_UNABOVE:
if (flags & META_FRAME_ABOVE)
return &fgeom->unabove_rect;
else
return NULL;
case META_BUTTON_FUNCTION_UNSTICK:
if (flags & META_FRAME_STUCK)
return &fgeom->unstick_rect;
default:
/* just go on to the next switch block */;
}
}
/* now consider the buttons which exist in all versions */
switch (function)
{
case META_BUTTON_FUNCTION_MENU:
if (flags & META_FRAME_ALLOWS_MENU)
return &fgeom->menu_rect;
else
return NULL;
case META_BUTTON_FUNCTION_APPMENU:
if (flags & META_FRAME_ALLOWS_APPMENU)
return &fgeom->appmenu_rect;
else
return NULL;
case META_BUTTON_FUNCTION_MINIMIZE:
if (flags & META_FRAME_ALLOWS_MINIMIZE)
return &fgeom->min_rect;
else
return NULL;
case META_BUTTON_FUNCTION_MAXIMIZE:
if (flags & META_FRAME_ALLOWS_MAXIMIZE)
return &fgeom->max_rect;
else
return NULL;
case META_BUTTON_FUNCTION_CLOSE:
if (flags & META_FRAME_ALLOWS_DELETE)
return &fgeom->close_rect;
else
return NULL;
case META_BUTTON_FUNCTION_STICK:
case META_BUTTON_FUNCTION_SHADE:
case META_BUTTON_FUNCTION_ABOVE:
case META_BUTTON_FUNCTION_UNSTICK:
case META_BUTTON_FUNCTION_UNSHADE:
case META_BUTTON_FUNCTION_UNABOVE:
/* we are being asked for a >v1 button which hasn't been handled yet,
* so obviously we're not in a theme which supports that version.
* therefore, we don't show the button. return NULL and all will
* be well.
*/
return NULL;
case META_BUTTON_FUNCTION_LAST:
return NULL;
}
return NULL;
}
static gboolean
strip_button (MetaButtonSpace *func_rects[MAX_BUTTONS_PER_CORNER],
GdkRectangle *bg_rects[MAX_BUTTONS_PER_CORNER],
int *n_rects,
MetaButtonSpace *to_strip)
{
int i;
i = 0;
while (i < *n_rects)
{
if (func_rects[i] == to_strip)
{
*n_rects -= 1;
/* shift the other rects back in the array */
while (i < *n_rects)
{
func_rects[i] = func_rects[i+1];
bg_rects[i] = bg_rects[i+1];
++i;
}
func_rects[i] = NULL;
bg_rects[i] = NULL;
return TRUE;
}
++i;
}
return FALSE; /* did not strip anything */
}
static void
meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
int text_height,
MetaFrameFlags flags,
int client_width,
int client_height,
const MetaButtonLayout *button_layout,
MetaFrameType type,
MetaFrameGeometry *fgeom,
MetaTheme *theme)
{
int i, n_left, n_right, n_left_spacers, n_right_spacers;
int x;
int button_y;
int title_right_edge;
int width, height;
int button_width, button_height;
int min_size_for_rounding;
/* the left/right rects in order; the max # of rects
* is the number of button functions
*/
MetaButtonSpace *left_func_rects[MAX_BUTTONS_PER_CORNER];
MetaButtonSpace *right_func_rects[MAX_BUTTONS_PER_CORNER];
GdkRectangle *left_bg_rects[MAX_BUTTONS_PER_CORNER];
gboolean left_buttons_has_spacer[MAX_BUTTONS_PER_CORNER];
GdkRectangle *right_bg_rects[MAX_BUTTONS_PER_CORNER];
gboolean right_buttons_has_spacer[MAX_BUTTONS_PER_CORNER];
MetaFrameBorders borders;
meta_frame_layout_get_borders (layout, text_height,
flags, type,
&borders);
fgeom->borders = borders;
width = client_width + borders.total.left + borders.total.right;
height = borders.total.top + borders.total.bottom;
if (!(flags & META_FRAME_SHADED))
height += client_height;
fgeom->width = width;
fgeom->height = height;
fgeom->top_titlebar_edge = layout->title_border.top;
fgeom->bottom_titlebar_edge = layout->title_border.bottom;
fgeom->left_titlebar_edge = layout->left_titlebar_edge;
fgeom->right_titlebar_edge = layout->right_titlebar_edge;
/* gcc warnings */
button_width = -1;
button_height = -1;
switch (layout->button_sizing)
{
case META_BUTTON_SIZING_ASPECT:
button_height = borders.visible.top - layout->button_border.top - layout->button_border.bottom;
button_width = button_height / layout->button_aspect;
break;
case META_BUTTON_SIZING_FIXED:
button_width = layout->button_width;
button_height = layout->button_height;
break;
case META_BUTTON_SIZING_LAST:
g_assert_not_reached ();
break;
}
/* FIXME all this code sort of pretends that duplicate buttons
* with the same function are allowed, but that breaks the
* code in frames.c, so isn't really allowed right now.
* Would need left_close_rect, right_close_rect, etc.
*/
/* Init all button rects to 0, lame hack */
memset (ADDRESS_OF_BUTTON_RECTS (fgeom), '\0',
LENGTH_OF_BUTTON_RECTS);
n_left = 0;
n_right = 0;
n_left_spacers = 0;
n_right_spacers = 0;
if (!layout->hide_buttons)
{
/* Try to fill in rects */
for (i = 0; i < MAX_BUTTONS_PER_CORNER && button_layout->left_buttons[i] != META_BUTTON_FUNCTION_LAST; i++)
{
left_func_rects[n_left] = rect_for_function (fgeom, flags,
button_layout->left_buttons[i],
theme);
if (left_func_rects[n_left] != NULL)
{
left_buttons_has_spacer[n_left] = button_layout->left_buttons_has_spacer[i];
if (button_layout->left_buttons_has_spacer[i])
++n_left_spacers;
++n_left;
}
}
for (i = 0; i < MAX_BUTTONS_PER_CORNER && button_layout->right_buttons[i] != META_BUTTON_FUNCTION_LAST; i++)
{
right_func_rects[n_right] = rect_for_function (fgeom, flags,
button_layout->right_buttons[i],
theme);
if (right_func_rects[n_right] != NULL)
{
right_buttons_has_spacer[n_right] = button_layout->right_buttons_has_spacer[i];
if (button_layout->right_buttons_has_spacer[i])
++n_right_spacers;
++n_right;
}
}
}
for (i = 0; i < MAX_BUTTONS_PER_CORNER; i++)
{
left_bg_rects[i] = NULL;
right_bg_rects[i] = NULL;
}
for (i = 0; i < n_left; i++)
{
if (n_left == 1)
left_bg_rects[i] = &fgeom->left_single_background;
else if (i == 0)
left_bg_rects[i] = &fgeom->left_left_background;
else if (i == (n_left - 1))
left_bg_rects[i] = &fgeom->left_right_background;
else
left_bg_rects[i] = &fgeom->left_middle_backgrounds[i - 1];
}
for (i = 0; i < n_right; i++)
{
if (n_right == 1)
right_bg_rects[i] = &fgeom->right_single_background;
else if (i == (n_right - 1))
right_bg_rects[i] = &fgeom->right_right_background;
else if (i == 0)
right_bg_rects[i] = &fgeom->right_left_background;
else
right_bg_rects[i] = &fgeom->right_middle_backgrounds[i - 1];
}
/* Be sure buttons fit */
while (n_left > 0 || n_right > 0)
{
int space_used_by_buttons;
int space_available;
space_available = fgeom->width - layout->left_titlebar_edge - layout->right_titlebar_edge;
space_used_by_buttons = 0;
space_used_by_buttons += button_width * n_left;
space_used_by_buttons += (button_width * 0.75) * n_left_spacers;
space_used_by_buttons += layout->titlebar_spacing * MAX (n_left - 1, 0);
space_used_by_buttons += button_width * n_right;
space_used_by_buttons += (button_width * 0.75) * n_right_spacers;
space_used_by_buttons += layout->titlebar_spacing * MAX (n_right - 1, 0);
if (space_used_by_buttons <= space_available)
break; /* Everything fits, bail out */
/* First try to remove separators */
if (n_left_spacers > 0)
{
left_buttons_has_spacer[--n_left_spacers] = FALSE;
continue;
}
else if (n_right_spacers > 0)
{
right_buttons_has_spacer[--n_right_spacers] = FALSE;
continue;
}
/* Otherwise we need to shave out a button. Shave
* above, stick, shade, min, max, close, then menu (menu is most useful);
* prefer the default button locations.
*/
if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->above_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->above_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->stick_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->stick_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->shade_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->shade_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->min_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->min_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->max_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->max_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->close_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->close_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->menu_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->menu_rect))
continue;
else if (strip_button (right_func_rects, right_bg_rects,
&n_right, &fgeom->appmenu_rect))
continue;
else if (strip_button (left_func_rects, left_bg_rects,
&n_left, &fgeom->appmenu_rect))
continue;
else
{
meta_bug ("Could not find a button to strip. n_left = %d n_right = %d\n",
n_left, n_right);
}
}
/* Save the button layout */
fgeom->button_layout = *button_layout;
fgeom->n_left_buttons = n_left;
fgeom->n_right_buttons = n_right;
/* center buttons vertically */
button_y = (borders.visible.top -
(button_height + layout->button_border.top + layout->button_border.bottom)) / 2 + layout->button_border.top + borders.invisible.top;
/* right edge of farthest-right button */
x = width - layout->right_titlebar_edge - borders.invisible.right;
i = n_right - 1;
while (i >= 0)
{
MetaButtonSpace *rect;
if (x < 0) /* if we go negative, leave the buttons we don't get to as 0-width */
break;
rect = right_func_rects[i];
rect->visible.x = x - button_width;
if (right_buttons_has_spacer[i])
rect->visible.x -= (button_width * 0.75);
rect->visible.y = button_y;
rect->visible.width = button_width;
rect->visible.height = button_height;
if (flags & META_FRAME_MAXIMIZED ||
flags & META_FRAME_TILED_LEFT ||
flags & META_FRAME_TILED_RIGHT)
{
rect->clickable.x = rect->visible.x;
rect->clickable.y = 0;
rect->clickable.width = rect->visible.width;
rect->clickable.height = button_height + button_y;
if (i == n_right - 1)
rect->clickable.width += layout->right_titlebar_edge + layout->right_width;
}
else
g_memmove (&(rect->clickable), &(rect->visible), sizeof(rect->clickable));
*(right_bg_rects[i]) = rect->visible;
x = rect->visible.x;
if (i > 0)
x -= layout->titlebar_spacing;
--i;
}
/* save right edge of titlebar for later use */
title_right_edge = x - layout->title_border.right;
/* Now x changes to be position from the left and we go through
* the left-side buttons
*/
x = layout->left_titlebar_edge + borders.invisible.left;
for (i = 0; i < n_left; i++)
{
MetaButtonSpace *rect;
rect = left_func_rects[i];
rect->visible.x = x;
rect->visible.y = button_y;
rect->visible.width = button_width;
rect->visible.height = button_height;
if (flags & META_FRAME_MAXIMIZED)
{
if (i==0)
{
rect->clickable.x = 0;
rect->clickable.width = button_width + x;
}
else
{
rect->clickable.x = rect->visible.x;
rect->clickable.width = button_width;
}
rect->clickable.y = 0;
rect->clickable.height = button_height + button_y;
}
else
g_memmove (&(rect->clickable), &(rect->visible), sizeof(rect->clickable));
x = rect->visible.x + rect->visible.width;
if (i < n_left - 1)
x += layout->titlebar_spacing;
if (left_buttons_has_spacer[i])
x += (button_width * 0.75);
*(left_bg_rects[i]) = rect->visible;
}
/* We always fill as much vertical space as possible with title rect,
* rather than centering it like the buttons
*/
fgeom->title_rect.x = x + layout->title_border.left;
fgeom->title_rect.y = layout->title_border.top + borders.invisible.top;
fgeom->title_rect.width = title_right_edge - fgeom->title_rect.x;
fgeom->title_rect.height = borders.visible.top - layout->title_border.top - layout->title_border.bottom;
/* Nuke title if it won't fit */
if (fgeom->title_rect.width < 0 ||
fgeom->title_rect.height < 0)
{
fgeom->title_rect.width = 0;
fgeom->title_rect.height = 0;
}
if (flags & META_FRAME_SHADED)
min_size_for_rounding = 0;
else
min_size_for_rounding = 5;
fgeom->top_left_corner_rounded_radius = 0;
fgeom->top_right_corner_rounded_radius = 0;
fgeom->bottom_left_corner_rounded_radius = 0;
fgeom->bottom_right_corner_rounded_radius = 0;
if (borders.visible.top + borders.visible.left >= min_size_for_rounding)
fgeom->top_left_corner_rounded_radius = layout->top_left_corner_rounded_radius;
if (borders.visible.top + borders.visible.right >= min_size_for_rounding)
fgeom->top_right_corner_rounded_radius = layout->top_right_corner_rounded_radius;
if (borders.visible.bottom + borders.visible.left >= min_size_for_rounding)
fgeom->bottom_left_corner_rounded_radius = layout->bottom_left_corner_rounded_radius;
if (borders.visible.bottom + borders.visible.right >= min_size_for_rounding)
fgeom->bottom_right_corner_rounded_radius = layout->bottom_right_corner_rounded_radius;
}
/**
* meta_gradient_spec_new: (skip)
*
*/
MetaGradientSpec*
meta_gradient_spec_new (MetaGradientType type)
{
MetaGradientSpec *spec;
spec = g_new (MetaGradientSpec, 1);
spec->type = type;
spec->color_specs = NULL;
return spec;
}
static void
free_color_spec (gpointer spec, gpointer user_data)
{
meta_color_spec_free (spec);
}
void
meta_gradient_spec_free (MetaGradientSpec *spec)
{
g_return_if_fail (spec != NULL);
g_slist_foreach (spec->color_specs, free_color_spec, NULL);
g_slist_free (spec->color_specs);
DEBUG_FILL_STRUCT (spec);
g_free (spec);
}
static cairo_pattern_t *
meta_gradient_spec_pattern (const MetaGradientSpec *spec,
const MetaAlphaGradientSpec *alpha_spec,
GtkStyleContext *style)
{
cairo_pattern_t *pattern;
int n_colors;
GSList *l;
int i;
if (spec->type == META_GRADIENT_HORIZONTAL)
pattern = cairo_pattern_create_linear (0, 0, 1, 0);
if (spec->type == META_GRADIENT_VERTICAL)
pattern = cairo_pattern_create_linear (0, 0, 0, 1);
else if (spec->type == META_GRADIENT_DIAGONAL)
pattern = cairo_pattern_create_linear (0, 0, 1, 1);
else
g_assert_not_reached ();
n_colors = g_slist_length (spec->color_specs);
if (n_colors == 0)
return NULL;
if (alpha_spec != NULL)
g_assert (n_colors == alpha_spec->n_alphas);
i = 0;
for (l = spec->color_specs; l != NULL; l = l->next)
{
MetaColorSpec *color_spec = l->data;
GdkRGBA color;
meta_color_spec_render (color_spec, style, &color);
if (alpha_spec != NULL)
color.alpha *= alpha_spec->alphas[i];
cairo_pattern_add_color_stop_rgba (pattern,
i / (float) n_colors,
color.red,
color.green,
color.blue,
color.alpha);
++i;
}
return pattern;
}
void
meta_gradient_spec_render (const MetaGradientSpec *spec,
const MetaAlphaGradientSpec *alpha_spec,
cairo_t *cr,
GtkStyleContext *style,
int x,
int y,
int width,
int height)
{
cairo_pattern_t *pattern;
cairo_save (cr);
pattern = meta_gradient_spec_pattern (spec, alpha_spec, style);
if (pattern == NULL)
return;
cairo_rectangle (cr, x, y, width, height);
cairo_translate (cr, x, y);
cairo_scale (cr, width, height);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
cairo_restore (cr);
}
gboolean
meta_gradient_spec_validate (MetaGradientSpec *spec,
GError **error)
{
g_return_val_if_fail (spec != NULL, FALSE);
if (g_slist_length (spec->color_specs) < 2)
{
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Gradients should have at least two colors"));
return FALSE;
}
return TRUE;
}
/**
* meta_alpha_gradient_spec_new: (skip)
*
*/
MetaAlphaGradientSpec*
meta_alpha_gradient_spec_new (MetaGradientType type,
int n_alphas)
{
MetaAlphaGradientSpec *spec;
g_return_val_if_fail (n_alphas > 0, NULL);
spec = g_new0 (MetaAlphaGradientSpec, 1);
spec->type = type;
spec->alphas = g_new0 (unsigned char, n_alphas);
spec->n_alphas = n_alphas;
return spec;
}
void
meta_alpha_gradient_spec_free (MetaAlphaGradientSpec *spec)
{
g_return_if_fail (spec != NULL);
g_free (spec->alphas);
g_free (spec);
}
/**
* meta_color_spec_new: (skip)
*
*/
MetaColorSpec*
meta_color_spec_new (MetaColorSpecType type)
{
MetaColorSpec *spec;
MetaColorSpec dummy;
int size;
size = G_STRUCT_OFFSET (MetaColorSpec, data);
switch (type)
{
case META_COLOR_SPEC_BASIC:
size += sizeof (dummy.data.basic);
break;
case META_COLOR_SPEC_GTK:
size += sizeof (dummy.data.gtk);
break;
case META_COLOR_SPEC_GTK_CUSTOM:
size += sizeof (dummy.data.gtkcustom);
break;
case META_COLOR_SPEC_BLEND:
size += sizeof (dummy.data.blend);
break;
case META_COLOR_SPEC_SHADE:
size += sizeof (dummy.data.shade);
break;
}
spec = g_malloc0 (size);
spec->type = type;
return spec;
}
void
meta_color_spec_free (MetaColorSpec *spec)
{
g_return_if_fail (spec != NULL);
switch (spec->type)
{
case META_COLOR_SPEC_BASIC:
DEBUG_FILL_STRUCT (&spec->data.basic);
break;
case META_COLOR_SPEC_GTK:
DEBUG_FILL_STRUCT (&spec->data.gtk);
break;
case META_COLOR_SPEC_GTK_CUSTOM:
g_free (spec->data.gtkcustom.color_name);
if (spec->data.gtkcustom.fallback)
meta_color_spec_free (spec->data.gtkcustom.fallback);
DEBUG_FILL_STRUCT (&spec->data.gtkcustom);
break;
case META_COLOR_SPEC_BLEND:
if (spec->data.blend.foreground)
meta_color_spec_free (spec->data.blend.foreground);
if (spec->data.blend.background)
meta_color_spec_free (spec->data.blend.background);
DEBUG_FILL_STRUCT (&spec->data.blend);
break;
case META_COLOR_SPEC_SHADE:
if (spec->data.shade.base)
meta_color_spec_free (spec->data.shade.base);
DEBUG_FILL_STRUCT (&spec->data.shade);
break;
}
g_free (spec);
}
/**
* meta_color_spec_new_from_string: (skip)
*
*/
MetaColorSpec*
meta_color_spec_new_from_string (const char *str,
GError **err)
{
MetaColorSpec *spec;
spec = NULL;
if (strncmp (str, "gtk:custom", 10) == 0)
{
const char *color_name_start, *fallback_str_start, *end;
char *color_name;
MetaColorSpec *fallback = NULL;
static gboolean debug, debug_set = FALSE;
if (!debug_set)
{
debug = g_getenv ("MUTTER_DISABLE_FALLBACK_COLOR") != NULL;
debug_set = TRUE;
}
if (str[10] != '(')
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("GTK custom color specification must have color name and fallback in parentheses, e.g. gtk:custom(foo,bar); could not parse \"%s\""),
str);
return NULL;
}
color_name_start = str + 11;
fallback_str_start = color_name_start;
while (*fallback_str_start && *fallback_str_start != ',')
{
if (!(g_ascii_isalnum (*fallback_str_start)
|| *fallback_str_start == '-'
|| *fallback_str_start == '_'))
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Invalid character '%c' in color_name parameter of gtk:custom, only A-Za-z0-9-_ are valid"),
*fallback_str_start);
return NULL;
}
fallback_str_start++;
}
fallback_str_start++;
end = strrchr (str, ')');
if (color_name_start == NULL || fallback_str_start == NULL || end == NULL)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Gtk:custom format is \"gtk:custom(color_name,fallback)\", \"%s\" does not fit the format"),
str);
return NULL;
}
if (!debug)
{
char *fallback_str;
fallback_str = g_strndup (fallback_str_start,
end - fallback_str_start);
fallback = meta_color_spec_new_from_string (fallback_str, err);
g_free (fallback_str);
}
else
{
fallback = meta_color_spec_new_from_string ("pink", err);
}
if (fallback == NULL)
return NULL;
color_name = g_strndup (color_name_start,
fallback_str_start - color_name_start - 1);
spec = meta_color_spec_new (META_COLOR_SPEC_GTK_CUSTOM);
spec->data.gtkcustom.color_name = color_name;
spec->data.gtkcustom.fallback = fallback;
}
else if (strncmp (str, "gtk:", 4) == 0)
{
/* GTK color */
const char *bracket;
const char *end_bracket;
char *tmp;
GtkStateFlags state;
MetaGtkColorComponent component;
bracket = str;
while (*bracket && *bracket != '[')
++bracket;
if (*bracket == '\0')
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("GTK color specification must have the state in brackets, e.g. gtk:fg[NORMAL] where NORMAL is the state; could not parse \"%s\""),
str);
return NULL;
}
end_bracket = bracket;
++end_bracket;
while (*end_bracket && *end_bracket != ']')
++end_bracket;
if (*end_bracket == '\0')
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("GTK color specification must have a close bracket after the state, e.g. gtk:fg[NORMAL] where NORMAL is the state; could not parse \"%s\""),
str);
return NULL;
}
tmp = g_strndup (bracket + 1, end_bracket - bracket - 1);
state = meta_gtk_state_from_string (tmp);
if (((int) state) == -1)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Did not understand state \"%s\" in color specification"),
tmp);
g_free (tmp);
return NULL;
}
g_free (tmp);
tmp = g_strndup (str + 4, bracket - str - 4);
component = meta_color_component_from_string (tmp);
if (component == META_GTK_COLOR_LAST)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Did not understand color component \"%s\" in color specification"),
tmp);
g_free (tmp);
return NULL;
}
g_free (tmp);
spec = meta_color_spec_new (META_COLOR_SPEC_GTK);
spec->data.gtk.state = state;
spec->data.gtk.component = component;
g_assert (spec->data.gtk.component < META_GTK_COLOR_LAST);
}
else if (strncmp (str, "blend/", 6) == 0)
{
/* blend */
char **split;
double alpha;
char *end;
MetaColorSpec *fg;
MetaColorSpec *bg;
split = g_strsplit (str, "/", 4);
if (split[0] == NULL || split[1] == NULL ||
split[2] == NULL || split[3] == NULL)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Blend format is \"blend/bg_color/fg_color/alpha\", \"%s\" does not fit the format"),
str);
g_strfreev (split);
return NULL;
}
alpha = g_ascii_strtod (split[3], &end);
if (end == split[3])
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Could not parse alpha value \"%s\" in blended color"),
split[3]);
g_strfreev (split);
return NULL;
}
if (alpha < (0.0 - 1e6) || alpha > (1.0 + 1e6))
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Alpha value \"%s\" in blended color is not between 0.0 and 1.0"),
split[3]);
g_strfreev (split);
return NULL;
}
fg = NULL;
bg = NULL;
bg = meta_color_spec_new_from_string (split[1], err);
if (bg == NULL)
{
g_strfreev (split);
return NULL;
}
fg = meta_color_spec_new_from_string (split[2], err);
if (fg == NULL)
{
meta_color_spec_free (bg);
g_strfreev (split);
return NULL;
}
g_strfreev (split);
spec = meta_color_spec_new (META_COLOR_SPEC_BLEND);
spec->data.blend.alpha = alpha;
spec->data.blend.background = bg;
spec->data.blend.foreground = fg;
}
else if (strncmp (str, "shade/", 6) == 0)
{
/* shade */
char **split;
double factor;
char *end;
MetaColorSpec *base;
split = g_strsplit (str, "/", 3);
if (split[0] == NULL || split[1] == NULL ||
split[2] == NULL)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Shade format is \"shade/base_color/factor\", \"%s\" does not fit the format"),
str);
g_strfreev (split);
return NULL;
}
factor = g_ascii_strtod (split[2], &end);
if (end == split[2])
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Could not parse shade factor \"%s\" in shaded color"),
split[2]);
g_strfreev (split);
return NULL;
}
if (factor < (0.0 - 1e6))
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Shade factor \"%s\" in shaded color is negative"),
split[2]);
g_strfreev (split);
return NULL;
}
base = NULL;
base = meta_color_spec_new_from_string (split[1], err);
if (base == NULL)
{
g_strfreev (split);
return NULL;
}
g_strfreev (split);
spec = meta_color_spec_new (META_COLOR_SPEC_SHADE);
spec->data.shade.factor = factor;
spec->data.shade.base = base;
}
else
{
spec = meta_color_spec_new (META_COLOR_SPEC_BASIC);
if (!gdk_rgba_parse (&spec->data.basic.color, str))
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Could not parse color \"%s\""),
str);
meta_color_spec_free (spec);
return NULL;
}
}
g_assert (spec);
return spec;
}
/**
* meta_color_spec_new_gtk: (skip)
*
*/
MetaColorSpec*
meta_color_spec_new_gtk (MetaGtkColorComponent component,
GtkStateFlags state)
{
MetaColorSpec *spec;
spec = meta_color_spec_new (META_COLOR_SPEC_GTK);
spec->data.gtk.component = component;
spec->data.gtk.state = state;
return spec;
}
/* Based on set_color() in gtkstyle.c */
#define LIGHTNESS_MULT 1.3
#define DARKNESS_MULT 0.7
void
meta_gtk_style_get_light_color (GtkStyleContext *style,
GtkStateFlags state,
GdkRGBA *color)
{
gtk_style_context_get_background_color (style, state, color);
gtk_style_shade (color, color, LIGHTNESS_MULT);
}
void
meta_gtk_style_get_dark_color (GtkStyleContext *style,
GtkStateFlags state,
GdkRGBA *color)
{
gtk_style_context_get_background_color (style, state, color);
gtk_style_shade (color, color, DARKNESS_MULT);
}
static void
meta_set_color_from_style (GdkRGBA *color,
GtkStyleContext *context,
GtkStateFlags state,
MetaGtkColorComponent component)
{
GdkRGBA other;
switch (component)
{
case META_GTK_COLOR_BG:
case META_GTK_COLOR_BASE:
gtk_style_context_get_background_color (context, state, color);
break;
case META_GTK_COLOR_FG:
case META_GTK_COLOR_TEXT:
gtk_style_context_get_color (context, state, color);
break;
case META_GTK_COLOR_TEXT_AA:
gtk_style_context_get_color (context, state, color);
meta_set_color_from_style (&other, context, state, META_GTK_COLOR_BASE);
color->red = (color->red + other.red) / 2;
color->green = (color->green + other.green) / 2;
color->blue = (color->blue + other.blue) / 2;
break;
case META_GTK_COLOR_MID:
meta_gtk_style_get_light_color (context, state, color);
meta_gtk_style_get_dark_color (context, state, &other);
color->red = (color->red + other.red) / 2;
color->green = (color->green + other.green) / 2;
color->blue = (color->blue + other.blue) / 2;
break;
case META_GTK_COLOR_LIGHT:
meta_gtk_style_get_light_color (context, state, color);
break;
case META_GTK_COLOR_DARK:
meta_gtk_style_get_dark_color (context, state, color);
break;
case META_GTK_COLOR_LAST:
g_assert_not_reached ();
break;
}
}
static void
meta_set_custom_color_from_style (GdkRGBA *color,
GtkStyleContext *context,
char *color_name,
MetaColorSpec *fallback)
{
if (!gtk_style_context_lookup_color (context, color_name, color))
meta_color_spec_render (fallback, context, color);
}
void
meta_color_spec_render (MetaColorSpec *spec,
GtkStyleContext *context,
GdkRGBA *color)
{
g_return_if_fail (spec != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
switch (spec->type)
{
case META_COLOR_SPEC_BASIC:
*color = spec->data.basic.color;
break;
case META_COLOR_SPEC_GTK:
meta_set_color_from_style (color,
context,
spec->data.gtk.state,
spec->data.gtk.component);
break;
case META_COLOR_SPEC_GTK_CUSTOM:
meta_set_custom_color_from_style (color,
context,
spec->data.gtkcustom.color_name,
spec->data.gtkcustom.fallback);
break;
case META_COLOR_SPEC_BLEND:
{
GdkRGBA bg, fg;
meta_color_spec_render (spec->data.blend.background, context, &bg);
meta_color_spec_render (spec->data.blend.foreground, context, &fg);
color_composite (&bg, &fg, spec->data.blend.alpha,
&spec->data.blend.color);
*color = spec->data.blend.color;
}
break;
case META_COLOR_SPEC_SHADE:
{
meta_color_spec_render (spec->data.shade.base, context,
&spec->data.shade.color);
gtk_style_shade (&spec->data.shade.color,
&spec->data.shade.color, spec->data.shade.factor);
*color = spec->data.shade.color;
}
break;
}
}
/**
* op_name:
* @type: an operation, such as addition
*
* Represents an operation as a string.
*
* Returns: a string, such as "+"
*/
static const char*
op_name (PosOperatorType type)
{
switch (type)
{
case POS_OP_ADD:
return "+";
case POS_OP_SUBTRACT:
return "-";
case POS_OP_MULTIPLY:
return "*";
case POS_OP_DIVIDE:
return "/";
case POS_OP_MOD:
return "%";
case POS_OP_MAX:
return "`max`";
case POS_OP_MIN:
return "`min`";
case POS_OP_NONE:
break;
}
return "";
}
/**
* op_from_string:
* @p: a pointer into a string representing an operation; part of an
* expression somewhere, so not null-terminated
* @len: set to the length of the string found. Set to 0 if none is.
*
* Parses a string and returns an operation.
*
* Returns: the operation found. If none was, returns %POS_OP_NONE.
*/
static PosOperatorType
op_from_string (const char *p,
int *len)
{
*len = 0;
switch (*p)
{
case '+':
*len = 1;
return POS_OP_ADD;
case '-':
*len = 1;
return POS_OP_SUBTRACT;
case '*':
*len = 1;
return POS_OP_MULTIPLY;
case '/':
*len = 1;
return POS_OP_DIVIDE;
case '%':
*len = 1;
return POS_OP_MOD;
case '`':
if (strncmp (p, "`max`", 5) == 0)
{
*len = 5;
return POS_OP_MAX;
}
else if (strncmp (p, "`min`", 5) == 0)
{
*len = 5;
return POS_OP_MIN;
}
}
return POS_OP_NONE;
}
/**
* free_tokens:
* @tokens: an array of tokens to be freed
* @n_tokens: how many tokens are in the array.
*
* Frees an array of tokens. All the tokens and their associated memory
* will be freed.
*/
static void
free_tokens (PosToken *tokens,
int n_tokens)
{
int i;
/* n_tokens can be 0 since tokens may have been allocated more than
* it was initialized
*/
for (i = 0; i < n_tokens; i++)
if (tokens[i].type == POS_TOKEN_VARIABLE)
g_free (tokens[i].d.v.name);
g_free (tokens);
}
/**
* parse_number:
* @p: a pointer into a string representing an operation; part of an
* expression somewhere, so not null-terminated
* @end_return: set to a pointer to the end of the number found; but
* not updated if no number was found at all
* @next: set to either an integer or a float token
* @err: (out): set to the problem if there was a problem
*
* Tokenises a number in an expression.
*
* FIXME: The "while (*start)..." part: what's wrong with strchr-ish things?
* FIXME: The name is wrong: it doesn't parse anything.
*
* Returns: %TRUE if a valid number was found, FALSE otherwise (and "err" will
* have been set)
*/
static gboolean
parse_number (const char *p,
const char **end_return,
PosToken *next,
GError **err)
{
const char *start = p;
char *end;
gboolean is_float;
char *num_str;
while (*p && (*p == '.' || g_ascii_isdigit (*p)))
++p;
if (p == start)
{
char buf[7] = { '\0' };
buf[g_unichar_to_utf8 (g_utf8_get_char (p), buf)] = '\0';
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_BAD_CHARACTER,
_("Coordinate expression contains character '%s' which is not allowed"),
buf);
return FALSE;
}
*end_return = p;
/* we need this to exclude floats like "1e6" */
num_str = g_strndup (start, p - start);
start = num_str;
is_float = FALSE;
while (*start)
{
if (*start == '.')
is_float = TRUE;
++start;
}
if (is_float)
{
next->type = POS_TOKEN_DOUBLE;
next->d.d.val = g_ascii_strtod (num_str, &end);
if (end == num_str)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression contains floating point number '%s' which could not be parsed"),
num_str);
g_free (num_str);
return FALSE;
}
}
else
{
next->type = POS_TOKEN_INT;
next->d.i.val = strtol (num_str, &end, 10);
if (end == num_str)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression contains integer '%s' which could not be parsed"),
num_str);
g_free (num_str);
return FALSE;
}
}
g_free (num_str);
g_assert (next->type == POS_TOKEN_INT || next->type == POS_TOKEN_DOUBLE);
return TRUE;
}
/*
* Whether a variable can validly appear as part of the name of a variable.
*/
#define IS_VARIABLE_CHAR(c) (g_ascii_isalpha ((c)) || (c) == '_')
#if 0
static void
debug_print_tokens (PosToken *tokens,
int n_tokens)
{
int i;
for (i = 0; i < n_tokens; i++)
{
PosToken *t = &tokens[i];
g_print (" ");
switch (t->type)
{
case POS_TOKEN_INT:
g_print ("\"%d\"", t->d.i.val);
break;
case POS_TOKEN_DOUBLE:
g_print ("\"%g\"", t->d.d.val);
break;
case POS_TOKEN_OPEN_PAREN:
g_print ("\"(\"");
break;
case POS_TOKEN_CLOSE_PAREN:
g_print ("\")\"");
break;
case POS_TOKEN_VARIABLE:
g_print ("\"%s\"", t->d.v.name);
break;
case POS_TOKEN_OPERATOR:
g_print ("\"%s\"", op_name (t->d.o.op));
break;
}
}
g_print ("\n");
}
#endif
/**
* pos_tokenize:
* @expr: The expression
* @tokens_p: (out): The resulting tokens
* @n_tokens_p: (out): The number of resulting tokens
* @err: (out): set to the problem if there was a problem
* Tokenises an expression.
*
* Returns: %TRUE if the expression was successfully tokenised; %FALSE otherwise.
*/
static gboolean
pos_tokenize (const char *expr,
PosToken **tokens_p,
int *n_tokens_p,
GError **err)
{
PosToken *tokens;
int n_tokens;
int allocated;
const char *p;
*tokens_p = NULL;
*n_tokens_p = 0;
allocated = 3;
n_tokens = 0;
tokens = g_new (PosToken, allocated);
p = expr;
while (*p)
{
PosToken *next;
int len;
if (n_tokens == allocated)
{
allocated *= 2;
tokens = g_renew (PosToken, tokens, allocated);
}
next = &tokens[n_tokens];
switch (*p)
{
case '*':
case '/':
case '+':
case '-': /* negative numbers aren't allowed so this is easy */
case '%':
case '`':
next->type = POS_TOKEN_OPERATOR;
next->d.o.op = op_from_string (p, &len);
if (next->d.o.op != POS_OP_NONE)
{
++n_tokens;
p = p + (len - 1); /* -1 since we ++p later */
}
else
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression contained unknown operator at the start of this text: \"%s\""),
p);
goto error;
}
break;
case '(':
next->type = POS_TOKEN_OPEN_PAREN;
++n_tokens;
break;
case ')':
next->type = POS_TOKEN_CLOSE_PAREN;
++n_tokens;
break;
case ' ':
case '\t':
case '\n':
break;
default:
if (IS_VARIABLE_CHAR (*p))
{
/* Assume variable */
const char *start = p;
while (*p && IS_VARIABLE_CHAR (*p))
++p;
g_assert (p != start);
next->type = POS_TOKEN_VARIABLE;
next->d.v.name = g_strndup (start, p - start);
++n_tokens;
--p; /* since we ++p again at the end of while loop */
}
else
{
/* Assume number */
const char *end;
if (!parse_number (p, &end, next, err))
goto error;
++n_tokens;
p = end - 1; /* -1 since we ++p again at the end of while loop */
}
break;
}
++p;
}
if (n_tokens == 0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression was empty or not understood"));
goto error;
}
*tokens_p = tokens;
*n_tokens_p = n_tokens;
return TRUE;
error:
g_assert (err == NULL || *err != NULL);
free_tokens (tokens, n_tokens);
return FALSE;
}
/**
* PosExprType:
*
* The type of a PosExpr: either integer, double, or an operation.
*/
typedef enum
{
POS_EXPR_INT,
POS_EXPR_DOUBLE,
POS_EXPR_OPERATOR
} PosExprType;
/**
* PosExpr:
*
* Type and value of an expression in a parsed sequence. We don't
* keep expressions in a tree; if this is of type %POS_EXPR_OPERATOR,
* the arguments of the operator will be in the array positions
* immediately preceding and following this operator; they cannot
* themselves be operators.
*
* FIXME: operator is #gchar; it should really be of #PosOperatorType.
*/
typedef struct
{
PosExprType type;
union
{
double double_val;
int int_val;
char operator;
} d;
} PosExpr;
#if 0
static void
debug_print_exprs (PosExpr *exprs,
int n_exprs)
{
int i;
for (i = 0; i < n_exprs; i++)
{
switch (exprs[i].type)
{
case POS_EXPR_INT:
g_print (" %d", exprs[i].d.int_val);
break;
case POS_EXPR_DOUBLE:
g_print (" %g", exprs[i].d.double_val);
break;
case POS_EXPR_OPERATOR:
g_print (" %s", op_name (exprs[i].d.operator));
break;
}
}
g_print ("\n");
}
#endif
static gboolean
do_operation (PosExpr *a,
PosExpr *b,
PosOperatorType op,
GError **err)
{
/* Promote types to double if required */
if (a->type == POS_EXPR_DOUBLE ||
b->type == POS_EXPR_DOUBLE)
{
if (a->type != POS_EXPR_DOUBLE)
{
a->type = POS_EXPR_DOUBLE;
a->d.double_val = a->d.int_val;
}
if (b->type != POS_EXPR_DOUBLE)
{
b->type = POS_EXPR_DOUBLE;
b->d.double_val = b->d.int_val;
}
}
g_assert (a->type == b->type);
if (a->type == POS_EXPR_INT)
{
switch (op)
{
case POS_OP_MULTIPLY:
a->d.int_val = a->d.int_val * b->d.int_val;
break;
case POS_OP_DIVIDE:
if (b->d.int_val == 0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_DIVIDE_BY_ZERO,
_("Coordinate expression results in division by zero"));
return FALSE;
}
a->d.int_val = a->d.int_val / b->d.int_val;
break;
case POS_OP_MOD:
if (b->d.int_val == 0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_DIVIDE_BY_ZERO,
_("Coordinate expression results in division by zero"));
return FALSE;
}
a->d.int_val = a->d.int_val % b->d.int_val;
break;
case POS_OP_ADD:
a->d.int_val = a->d.int_val + b->d.int_val;
break;
case POS_OP_SUBTRACT:
a->d.int_val = a->d.int_val - b->d.int_val;
break;
case POS_OP_MAX:
a->d.int_val = MAX (a->d.int_val, b->d.int_val);
break;
case POS_OP_MIN:
a->d.int_val = MIN (a->d.int_val, b->d.int_val);
break;
case POS_OP_NONE:
g_assert_not_reached ();
break;
}
}
else if (a->type == POS_EXPR_DOUBLE)
{
switch (op)
{
case POS_OP_MULTIPLY:
a->d.double_val = a->d.double_val * b->d.double_val;
break;
case POS_OP_DIVIDE:
if (b->d.double_val == 0.0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_DIVIDE_BY_ZERO,
_("Coordinate expression results in division by zero"));
return FALSE;
}
a->d.double_val = a->d.double_val / b->d.double_val;
break;
case POS_OP_MOD:
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_MOD_ON_FLOAT,
_("Coordinate expression tries to use mod operator on a floating-point number"));
return FALSE;
case POS_OP_ADD:
a->d.double_val = a->d.double_val + b->d.double_val;
break;
case POS_OP_SUBTRACT:
a->d.double_val = a->d.double_val - b->d.double_val;
break;
case POS_OP_MAX:
a->d.double_val = MAX (a->d.double_val, b->d.double_val);
break;
case POS_OP_MIN:
a->d.double_val = MIN (a->d.double_val, b->d.double_val);
break;
case POS_OP_NONE:
g_assert_not_reached ();
break;
}
}
else
g_assert_not_reached ();
return TRUE;
}
static gboolean
do_operations (PosExpr *exprs,
int *n_exprs,
int precedence,
GError **err)
{
int i;
#if 0
g_print ("Doing prec %d ops on %d exprs\n", precedence, *n_exprs);
debug_print_exprs (exprs, *n_exprs);
#endif
i = 1;
while (i < *n_exprs)
{
gboolean compress;
/* exprs[i-1] first operand
* exprs[i] operator
* exprs[i+1] second operand
*
* we replace first operand with result of mul/div/mod,
* or skip over operator and second operand if we have
* an add/subtract
*/
if (exprs[i-1].type == POS_EXPR_OPERATOR)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression has an operator \"%s\" where an operand was expected"),
op_name (exprs[i-1].d.operator));
return FALSE;
}
if (exprs[i].type != POS_EXPR_OPERATOR)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression had an operand where an operator was expected"));
return FALSE;
}
if (i == (*n_exprs - 1))
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression ended with an operator instead of an operand"));
return FALSE;
}
g_assert ((i+1) < *n_exprs);
if (exprs[i+1].type == POS_EXPR_OPERATOR)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression has operator \"%c\" following operator \"%c\" with no operand in between"),
exprs[i+1].d.operator,
exprs[i].d.operator);
return FALSE;
}
compress = FALSE;
switch (precedence)
{
case 2:
switch (exprs[i].d.operator)
{
case POS_OP_DIVIDE:
case POS_OP_MOD:
case POS_OP_MULTIPLY:
compress = TRUE;
if (!do_operation (&exprs[i-1], &exprs[i+1],
exprs[i].d.operator,
err))
return FALSE;
break;
}
break;
case 1:
switch (exprs[i].d.operator)
{
case POS_OP_ADD:
case POS_OP_SUBTRACT:
compress = TRUE;
if (!do_operation (&exprs[i-1], &exprs[i+1],
exprs[i].d.operator,
err))
return FALSE;
break;
}
break;
/* I have no rationale at all for making these low-precedence */
case 0:
switch (exprs[i].d.operator)
{
case POS_OP_MAX:
case POS_OP_MIN:
compress = TRUE;
if (!do_operation (&exprs[i-1], &exprs[i+1],
exprs[i].d.operator,
err))
return FALSE;
break;
}
break;
}
if (compress)
{
/* exprs[i-1] first operand (now result)
* exprs[i] operator
* exprs[i+1] second operand
* exprs[i+2] new operator
*
* we move new operator just after first operand
*/
if ((i+2) < *n_exprs)
{
g_memmove (&exprs[i], &exprs[i+2],
sizeof (PosExpr) * (*n_exprs - i - 2));
}
*n_exprs -= 2;
}
else
{
/* Skip operator and next operand */
i += 2;
}
}
return TRUE;
}
/**
* pos_eval_get_variable:
* @t: The token representing a variable
* @result: (out): The value of that variable; not set if the token did
* not represent a known variable
* @env: The environment within which t should be evaluated
* @err: (out): set to the problem if there was a problem
*
* There is a predefined set of variables which can appear in an expression.
* Here we take a token representing a variable, and return the current value
* of that variable in a particular environment.
* (The value is always an integer.)
*
* There are supposedly some circumstances in which this function can be
* called from outside Metacity, in which case env->theme will be %NULL, and
* therefore we can't use it to find out quark values, so we do the comparison
* using strcmp(), which is slower.
*
* FIXME: shouldn't @t be const?
* FIXME: we should perhaps consider some sort of lookup arrangement into an
* array; also, the duplication of code is unlovely; perhaps using glib
* string hashes instead of quarks would fix both problems?
*
* Returns: %TRUE if we found the variable asked for, %FALSE if we didn't
*/
static gboolean
pos_eval_get_variable (PosToken *t,
int *result,
const MetaPositionExprEnv *env,
GError **err)
{
if (env->theme)
{
if (t->d.v.name_quark == env->theme->quark_width)
*result = env->rect.width;
else if (t->d.v.name_quark == env->theme->quark_height)
*result = env->rect.height;
else if (env->object_width >= 0 &&
t->d.v.name_quark == env->theme->quark_object_width)
*result = env->object_width;
else if (env->object_height >= 0 &&
t->d.v.name_quark == env->theme->quark_object_height)
*result = env->object_height;
else if (t->d.v.name_quark == env->theme->quark_left_width)
*result = env->left_width;
else if (t->d.v.name_quark == env->theme->quark_right_width)
*result = env->right_width;
else if (t->d.v.name_quark == env->theme->quark_top_height)
*result = env->top_height;
else if (t->d.v.name_quark == env->theme->quark_bottom_height)
*result = env->bottom_height;
else if (t->d.v.name_quark == env->theme->quark_mini_icon_width)
*result = env->mini_icon_width;
else if (t->d.v.name_quark == env->theme->quark_mini_icon_height)
*result = env->mini_icon_height;
else if (t->d.v.name_quark == env->theme->quark_icon_width)
*result = env->icon_width;
else if (t->d.v.name_quark == env->theme->quark_icon_height)
*result = env->icon_height;
else if (t->d.v.name_quark == env->theme->quark_title_width)
*result = env->title_width;
else if (t->d.v.name_quark == env->theme->quark_title_height)
*result = env->title_height;
else if (t->d.v.name_quark == env->theme->quark_frame_x_center)
*result = env->frame_x_center;
else if (t->d.v.name_quark == env->theme->quark_frame_y_center)
*result = env->frame_y_center;
else
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_UNKNOWN_VARIABLE,
_("Coordinate expression had unknown variable or constant \"%s\""),
t->d.v.name);
return FALSE;
}
}
else
{
if (strcmp (t->d.v.name, "width") == 0)
*result = env->rect.width;
else if (strcmp (t->d.v.name, "height") == 0)
*result = env->rect.height;
else if (env->object_width >= 0 &&
strcmp (t->d.v.name, "object_width") == 0)
*result = env->object_width;
else if (env->object_height >= 0 &&
strcmp (t->d.v.name, "object_height") == 0)
*result = env->object_height;
else if (strcmp (t->d.v.name, "left_width") == 0)
*result = env->left_width;
else if (strcmp (t->d.v.name, "right_width") == 0)
*result = env->right_width;
else if (strcmp (t->d.v.name, "top_height") == 0)
*result = env->top_height;
else if (strcmp (t->d.v.name, "bottom_height") == 0)
*result = env->bottom_height;
else if (strcmp (t->d.v.name, "mini_icon_width") == 0)
*result = env->mini_icon_width;
else if (strcmp (t->d.v.name, "mini_icon_height") == 0)
*result = env->mini_icon_height;
else if (strcmp (t->d.v.name, "icon_width") == 0)
*result = env->icon_width;
else if (strcmp (t->d.v.name, "icon_height") == 0)
*result = env->icon_height;
else if (strcmp (t->d.v.name, "title_width") == 0)
*result = env->title_width;
else if (strcmp (t->d.v.name, "title_height") == 0)
*result = env->title_height;
else if (strcmp (t->d.v.name, "frame_x_center") == 0)
*result = env->frame_x_center;
else if (strcmp (t->d.v.name, "frame_y_center") == 0)
*result = env->frame_y_center;
else
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_UNKNOWN_VARIABLE,
_("Coordinate expression had unknown variable or constant \"%s\""),
t->d.v.name);
return FALSE;
}
}
return TRUE;
}
/**
* pos_eval_helper:
* @tokens: A list of tokens to evaluate.
* @n_tokens: How many tokens are in the list.
* @env: The environment context in which to evaluate the expression.
* @result: (out): The current value of the expression
*
* Evaluates a sequence of tokens within a particular environment context,
* and returns the current value. May recur if parantheses are found.
*
* FIXME: Yes, we really do reparse the expression every time it's evaluated.
* We should keep the parse tree around all the time and just
* run the new values through it.
*/
static gboolean
pos_eval_helper (PosToken *tokens,
int n_tokens,
const MetaPositionExprEnv *env,
PosExpr *result,
GError **err)
{
/* Lazy-ass hardcoded limit on number of terms in expression */
#define MAX_EXPRS 32
int paren_level;
int first_paren;
int i;
PosExpr exprs[MAX_EXPRS];
int n_exprs;
int precedence;
/* Our first goal is to get a list of PosExpr, essentially
* substituting variables and handling parentheses.
*/
first_paren = 0;
paren_level = 0;
n_exprs = 0;
for (i = 0; i < n_tokens; i++)
{
PosToken *t = &tokens[i];
if (n_exprs >= MAX_EXPRS)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression parser overflowed its buffer."));
return FALSE;
}
if (paren_level == 0)
{
switch (t->type)
{
case POS_TOKEN_INT:
exprs[n_exprs].type = POS_EXPR_INT;
exprs[n_exprs].d.int_val = t->d.i.val;
++n_exprs;
break;
case POS_TOKEN_DOUBLE:
exprs[n_exprs].type = POS_EXPR_DOUBLE;
exprs[n_exprs].d.double_val = t->d.d.val;
++n_exprs;
break;
case POS_TOKEN_OPEN_PAREN:
++paren_level;
if (paren_level == 1)
first_paren = i;
break;
case POS_TOKEN_CLOSE_PAREN:
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_BAD_PARENS,
_("Coordinate expression had a close parenthesis with no open parenthesis"));
return FALSE;
case POS_TOKEN_VARIABLE:
exprs[n_exprs].type = POS_EXPR_INT;
/* FIXME we should just dump all this crap
* in a hash, maybe keep width/height out
* for optimization purposes
*/
if (!pos_eval_get_variable (t, &exprs[n_exprs].d.int_val, env, err))
return FALSE;
++n_exprs;
break;
case POS_TOKEN_OPERATOR:
exprs[n_exprs].type = POS_EXPR_OPERATOR;
exprs[n_exprs].d.operator = t->d.o.op;
++n_exprs;
break;
}
}
else
{
g_assert (paren_level > 0);
switch (t->type)
{
case POS_TOKEN_INT:
case POS_TOKEN_DOUBLE:
case POS_TOKEN_VARIABLE:
case POS_TOKEN_OPERATOR:
break;
case POS_TOKEN_OPEN_PAREN:
++paren_level;
break;
case POS_TOKEN_CLOSE_PAREN:
if (paren_level == 1)
{
/* We closed a toplevel paren group, so recurse */
if (!pos_eval_helper (&tokens[first_paren+1],
i - first_paren - 1,
env,
&exprs[n_exprs],
err))
return FALSE;
++n_exprs;
}
--paren_level;
break;
}
}
}
if (paren_level > 0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_BAD_PARENS,
_("Coordinate expression had an open parenthesis with no close parenthesis"));
return FALSE;
}
/* Now we have no parens and no vars; so we just do all the multiplies
* and divides, then all the add and subtract.
*/
if (n_exprs == 0)
{
g_set_error (err, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("Coordinate expression doesn't seem to have any operators or operands"));
return FALSE;
}
/* precedence 1 ops */
precedence = 2;
while (precedence >= 0)
{
if (!do_operations (exprs, &n_exprs, precedence, err))
return FALSE;
--precedence;
}
g_assert (n_exprs == 1);
*result = *exprs;
return TRUE;
}
/*
* expr = int | double | expr * expr | expr / expr |
* expr + expr | expr - expr | (expr)
*
* so very not worth fooling with bison, yet so very painful by hand.
*/
/**
* pos_eval:
* @spec: The expression to evaluate.
* @env: The environment context to evaluate the expression in.
* @val_p: (out): The integer value of the expression; if the expression
* is of type float, this will be rounded. If we return
* %FALSE because the expression is invalid, this will be
* zero.
* @err: (out): The error, if anything went wrong.
*
* Evaluates an expression.
*
* FIXME: Shouldn't @spec be const?
*
* Returns: %TRUE if we evaluated the expression successfully; %FALSE otherwise.
*/
static gboolean
pos_eval (MetaDrawSpec *spec,
const MetaPositionExprEnv *env,
int *val_p,
GError **err)
{
PosExpr expr;
*val_p = 0;
if (pos_eval_helper (spec->tokens, spec->n_tokens, env, &expr, err))
{
switch (expr.type)
{
case POS_EXPR_INT:
*val_p = expr.d.int_val;
break;
case POS_EXPR_DOUBLE:
*val_p = expr.d.double_val;
break;
case POS_EXPR_OPERATOR:
g_assert_not_reached ();
break;
}
return TRUE;
}
else
{
return FALSE;
}
}
/* We always return both X and Y, but only one will be meaningful in
* most contexts.
*/
/**
* meta_parse_position_expression: (skip)
*
*/
gboolean
meta_parse_position_expression (MetaDrawSpec *spec,
const MetaPositionExprEnv *env,
int *x_return,
int *y_return,
GError **err)
{
/* All positions are in a coordinate system with x, y at the origin.
* The expression can have -, +, *, / as operators, floating point
* or integer constants, and the variables "width" and "height" and
* optionally "object_width" and object_height". Negative numbers
* aren't allowed.
*/
int val;
if (spec->constant)
val = spec->value;
else
{
if (pos_eval (spec, env, &spec->value, err) == FALSE)
{
g_assert (err == NULL || *err != NULL);
return FALSE;
}
val = spec->value;
}
if (x_return)
*x_return = env->rect.x + val;
if (y_return)
*y_return = env->rect.y + val;
return TRUE;
}
/**
* meta_parse_size_expression: (skip)
*
*/
gboolean
meta_parse_size_expression (MetaDrawSpec *spec,
const MetaPositionExprEnv *env,
int *val_return,
GError **err)
{
int val;
if (spec->constant)
val = spec->value;
else
{
if (pos_eval (spec, env, &spec->value, err) == FALSE)
{
g_assert (err == NULL || *err != NULL);
return FALSE;
}
val = spec->value;
}
if (val_return)
*val_return = MAX (val, 1); /* require that sizes be at least 1x1 */
return TRUE;
}
/* To do this we tokenize, replace variable tokens
* that are constants, then reassemble. The purpose
* here is to optimize expressions so we don't do hash
* lookups to eval them. Obviously it's a tradeoff that
* slows down theme load times.
*/
gboolean
meta_theme_replace_constants (MetaTheme *theme,
PosToken *tokens,
int n_tokens,
GError **err)
{
int i;
double dval;
int ival;
gboolean is_constant = TRUE;
/* Loop through tokenized string looking for variables to replace */
for (i = 0; i < n_tokens; i++)
{
PosToken *t = &tokens[i];
if (t->type == POS_TOKEN_VARIABLE)
{
if (meta_theme_lookup_int_constant (theme, t->d.v.name, &ival))
{
g_free (t->d.v.name);
t->type = POS_TOKEN_INT;
t->d.i.val = ival;
}
else if (meta_theme_lookup_float_constant (theme, t->d.v.name, &dval))
{
g_free (t->d.v.name);
t->type = POS_TOKEN_DOUBLE;
t->d.d.val = dval;
}
else
{
/* If we've found a variable that cannot be replaced then the
expression is not a constant expression and we want to
replace it with a GQuark */
t->d.v.name_quark = g_quark_from_string (t->d.v.name);
is_constant = FALSE;
}
}
}
return is_constant;
}
static int
parse_x_position_unchecked (MetaDrawSpec *spec,
const MetaPositionExprEnv *env)
{
int retval;
GError *error;
retval = 0;
error = NULL;
if (!meta_parse_position_expression (spec, env, &retval, NULL, &error))
{
meta_warning (_("Theme contained an expression that resulted in an error: %s\n"),
error->message);
g_error_free (error);
}
return retval;
}
static int
parse_y_position_unchecked (MetaDrawSpec *spec,
const MetaPositionExprEnv *env)
{
int retval;
GError *error;
retval = 0;
error = NULL;
if (!meta_parse_position_expression (spec, env, NULL, &retval, &error))
{
meta_warning (_("Theme contained an expression that resulted in an error: %s\n"),
error->message);
g_error_free (error);
}
return retval;
}
static int
parse_size_unchecked (MetaDrawSpec *spec,
MetaPositionExprEnv *env)
{
int retval;
GError *error;
retval = 0;
error = NULL;
if (!meta_parse_size_expression (spec, env, &retval, &error))
{
meta_warning (_("Theme contained an expression that resulted in an error: %s\n"),
error->message);
g_error_free (error);
}
return retval;
}
void
meta_draw_spec_free (MetaDrawSpec *spec)
{
if (!spec) return;
free_tokens (spec->tokens, spec->n_tokens);
g_slice_free (MetaDrawSpec, spec);
}
/**
* meta_draw_spec_new: (skip)
*
*/
MetaDrawSpec *
meta_draw_spec_new (MetaTheme *theme,
const char *expr,
GError **error)
{
MetaDrawSpec *spec;
spec = g_slice_new0 (MetaDrawSpec);
pos_tokenize (expr, &spec->tokens, &spec->n_tokens, NULL);
spec->constant = meta_theme_replace_constants (theme, spec->tokens,
spec->n_tokens, NULL);
if (spec->constant)
{
gboolean result;
result = pos_eval (spec, NULL, &spec->value, error);
if (result == FALSE)
{
meta_draw_spec_free (spec);
return NULL;
}
}
return spec;
}
/**
* meta_draw_op_new: (skip)
*
*/
MetaDrawOp*
meta_draw_op_new (MetaDrawType type)
{
MetaDrawOp *op;
MetaDrawOp dummy;
int size;
size = G_STRUCT_OFFSET (MetaDrawOp, data);
switch (type)
{
case META_DRAW_LINE:
size += sizeof (dummy.data.line);
break;
case META_DRAW_RECTANGLE:
size += sizeof (dummy.data.rectangle);
break;
case META_DRAW_ARC:
size += sizeof (dummy.data.arc);
break;
case META_DRAW_CLIP:
size += sizeof (dummy.data.clip);
break;
case META_DRAW_TINT:
size += sizeof (dummy.data.tint);
break;
case META_DRAW_GRADIENT:
size += sizeof (dummy.data.gradient);
break;
case META_DRAW_IMAGE:
size += sizeof (dummy.data.image);
break;
case META_DRAW_GTK_ARROW:
size += sizeof (dummy.data.gtk_arrow);
break;
case META_DRAW_GTK_BOX:
size += sizeof (dummy.data.gtk_box);
break;
case META_DRAW_GTK_VLINE:
size += sizeof (dummy.data.gtk_vline);
break;
case META_DRAW_ICON:
size += sizeof (dummy.data.icon);
break;
case META_DRAW_TITLE:
size += sizeof (dummy.data.title);
break;
case META_DRAW_OP_LIST:
size += sizeof (dummy.data.op_list);
break;
case META_DRAW_TILE:
size += sizeof (dummy.data.tile);
break;
}
op = g_malloc0 (size);
op->type = type;
return op;
}
void
meta_draw_op_free (MetaDrawOp *op)
{
g_return_if_fail (op != NULL);
switch (op->type)
{
case META_DRAW_LINE:
if (op->data.line.color_spec)
meta_color_spec_free (op->data.line.color_spec);
meta_draw_spec_free (op->data.line.x1);
meta_draw_spec_free (op->data.line.y1);
meta_draw_spec_free (op->data.line.x2);
meta_draw_spec_free (op->data.line.y2);
break;
case META_DRAW_RECTANGLE:
g_free (op->data.rectangle.color_spec);
meta_draw_spec_free (op->data.rectangle.x);
meta_draw_spec_free (op->data.rectangle.y);
meta_draw_spec_free (op->data.rectangle.width);
meta_draw_spec_free (op->data.rectangle.height);
break;
case META_DRAW_ARC:
g_free (op->data.arc.color_spec);
meta_draw_spec_free (op->data.arc.x);
meta_draw_spec_free (op->data.arc.y);
meta_draw_spec_free (op->data.arc.width);
meta_draw_spec_free (op->data.arc.height);
break;
case META_DRAW_CLIP:
meta_draw_spec_free (op->data.clip.x);
meta_draw_spec_free (op->data.clip.y);
meta_draw_spec_free (op->data.clip.width);
meta_draw_spec_free (op->data.clip.height);
break;
case META_DRAW_TINT:
if (op->data.tint.color_spec)
meta_color_spec_free (op->data.tint.color_spec);
if (op->data.tint.alpha_spec)
meta_alpha_gradient_spec_free (op->data.tint.alpha_spec);
meta_draw_spec_free (op->data.tint.x);
meta_draw_spec_free (op->data.tint.y);
meta_draw_spec_free (op->data.tint.width);
meta_draw_spec_free (op->data.tint.height);
break;
case META_DRAW_GRADIENT:
if (op->data.gradient.gradient_spec)
meta_gradient_spec_free (op->data.gradient.gradient_spec);
if (op->data.gradient.alpha_spec)
meta_alpha_gradient_spec_free (op->data.gradient.alpha_spec);
meta_draw_spec_free (op->data.gradient.x);
meta_draw_spec_free (op->data.gradient.y);
meta_draw_spec_free (op->data.gradient.width);
meta_draw_spec_free (op->data.gradient.height);
break;
case META_DRAW_IMAGE:
if (op->data.image.alpha_spec)
meta_alpha_gradient_spec_free (op->data.image.alpha_spec);
if (op->data.image.pixbuf)
g_object_unref (G_OBJECT (op->data.image.pixbuf));
meta_draw_spec_free (op->data.image.x);
meta_draw_spec_free (op->data.image.y);
meta_draw_spec_free (op->data.image.width);
meta_draw_spec_free (op->data.image.height);
break;
case META_DRAW_GTK_ARROW:
meta_draw_spec_free (op->data.gtk_arrow.x);
meta_draw_spec_free (op->data.gtk_arrow.y);
meta_draw_spec_free (op->data.gtk_arrow.width);
meta_draw_spec_free (op->data.gtk_arrow.height);
break;
case META_DRAW_GTK_BOX:
meta_draw_spec_free (op->data.gtk_box.x);
meta_draw_spec_free (op->data.gtk_box.y);
meta_draw_spec_free (op->data.gtk_box.width);
meta_draw_spec_free (op->data.gtk_box.height);
break;
case META_DRAW_GTK_VLINE:
meta_draw_spec_free (op->data.gtk_vline.x);
meta_draw_spec_free (op->data.gtk_vline.y1);
meta_draw_spec_free (op->data.gtk_vline.y2);
break;
case META_DRAW_ICON:
if (op->data.icon.alpha_spec)
meta_alpha_gradient_spec_free (op->data.icon.alpha_spec);
meta_draw_spec_free (op->data.icon.x);
meta_draw_spec_free (op->data.icon.y);
meta_draw_spec_free (op->data.icon.width);
meta_draw_spec_free (op->data.icon.height);
break;
case META_DRAW_TITLE:
if (op->data.title.color_spec)
meta_color_spec_free (op->data.title.color_spec);
meta_draw_spec_free (op->data.title.x);
meta_draw_spec_free (op->data.title.y);
if (op->data.title.ellipsize_width)
meta_draw_spec_free (op->data.title.ellipsize_width);
break;
case META_DRAW_OP_LIST:
if (op->data.op_list.op_list)
meta_draw_op_list_unref (op->data.op_list.op_list);
meta_draw_spec_free (op->data.op_list.x);
meta_draw_spec_free (op->data.op_list.y);
meta_draw_spec_free (op->data.op_list.width);
meta_draw_spec_free (op->data.op_list.height);
break;
case META_DRAW_TILE:
if (op->data.tile.op_list)
meta_draw_op_list_unref (op->data.tile.op_list);
meta_draw_spec_free (op->data.tile.x);
meta_draw_spec_free (op->data.tile.y);
meta_draw_spec_free (op->data.tile.width);
meta_draw_spec_free (op->data.tile.height);
meta_draw_spec_free (op->data.tile.tile_xoffset);
meta_draw_spec_free (op->data.tile.tile_yoffset);
meta_draw_spec_free (op->data.tile.tile_width);
meta_draw_spec_free (op->data.tile.tile_height);
break;
}
g_free (op);
}
static void
fill_env (MetaPositionExprEnv *env,
const MetaDrawInfo *info,
MetaRectangle logical_region)
{
/* FIXME this stuff could be raised into draw_op_list_draw() probably
*/
env->rect = logical_region;
env->object_width = -1;
env->object_height = -1;
if (info->fgeom)
{
env->left_width = info->fgeom->borders.visible.left;
env->right_width = info->fgeom->borders.visible.right;
env->top_height = info->fgeom->borders.visible.top;
env->bottom_height = info->fgeom->borders.visible.bottom;
env->frame_x_center = info->fgeom->width / 2 - logical_region.x;
env->frame_y_center = info->fgeom->height / 2 - logical_region.y;
}
else
{
env->left_width = 0;
env->right_width = 0;
env->top_height = 0;
env->bottom_height = 0;
env->frame_x_center = 0;
env->frame_y_center = 0;
}
env->mini_icon_width = info->mini_icon ? gdk_pixbuf_get_width (info->mini_icon) : 0;
env->mini_icon_height = info->mini_icon ? gdk_pixbuf_get_height (info->mini_icon) : 0;
env->icon_width = info->icon ? gdk_pixbuf_get_width (info->icon) : 0;
env->icon_height = info->icon ? gdk_pixbuf_get_height (info->icon) : 0;
env->title_width = info->title_layout_width;
env->title_height = info->title_layout_height;
env->theme = meta_current_theme;
}
static cairo_pattern_t *
meta_alpha_gradient_spec_pattern (const MetaAlphaGradientSpec *alpha_spec)
{
/* Hardcoded in theme-parser.c */
g_assert (alpha_spec->type == META_GRADIENT_HORIZONTAL);
int n_alphas = alpha_spec->n_alphas;
if (n_alphas == 0)
return NULL;
else if (n_alphas == 1)
return cairo_pattern_create_rgba (0, 0, 0, alpha_spec->alphas[0]);
else
{
cairo_pattern_t *pattern = cairo_pattern_create_linear (0, 0, 1, 0);
int i;
for (i = 0; i < n_alphas; i++)
cairo_pattern_add_color_stop_rgba (pattern,
i / (float) n_alphas,
0, 0, 0, alpha_spec->alphas[i]);
return pattern;
}
}
static void
draw_image (cairo_t *cr,
GdkPixbuf *src,
MetaImageFillType fill_type,
MetaAlphaGradientSpec *alpha_spec,
int x,
int y,
int width,
int height)
{
cairo_save (cr);
cairo_rectangle (cr, x, y, width, height);
if (fill_type == META_IMAGE_FILL_TILE)
{
gdk_cairo_set_source_pixbuf (cr, src, 0, 0);
cairo_pattern_set_extend (cairo_get_source (cr),
CAIRO_EXTEND_REPEAT);
}
else
{
float pixbuf_width, pixbuf_height;
pixbuf_width = gdk_pixbuf_get_width (src);
pixbuf_height = gdk_pixbuf_get_height (src);
cairo_save (cr);
cairo_translate (cr, x, y);
cairo_scale (cr,
pixbuf_width / width,
pixbuf_height / height);
gdk_cairo_set_source_pixbuf (cr, src, 0, 0);
cairo_restore (cr);
}
if (alpha_spec)
{
cairo_translate (cr, x, y);
cairo_scale (cr, width, height);
cairo_pattern_t *pattern = meta_alpha_gradient_spec_pattern (alpha_spec);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
}
else
{
cairo_fill (cr);
}
cairo_restore (cr);
}
/* This code was originally rendering anti-aliased using X primitives, and
* now has been switched to draw anti-aliased using cairo. In general, the
* closest correspondence between X rendering and cairo rendering is given
* by offsetting the geometry by 0.5 pixels in both directions before rendering
* with cairo. This is because X samples at the upper left corner of the
* pixel while cairo averages over the entire pixel. However, in the cases
* where the X rendering was an exact rectangle with no "jaggies"
* we need to be a bit careful about applying the offset. We want to produce
* the exact same pixel-aligned rectangle, rather than a rectangle with
* fuzz around the edges.
*/
static void
meta_draw_op_draw_with_env (const MetaDrawOp *op,
GtkStyleContext *style_gtk,
cairo_t *cr,
const MetaDrawInfo *info,
MetaRectangle rect,
MetaPositionExprEnv *env)
{
GdkRGBA color;
cairo_save (cr);
cairo_set_line_width (cr, 1.0);
switch (op->type)
{
case META_DRAW_LINE:
{
int x1, x2, y1, y2;
meta_color_spec_render (op->data.line.color_spec, style_gtk, &color);
gdk_cairo_set_source_rgba (cr, &color);
if (op->data.line.width > 0)
cairo_set_line_width (cr, op->data.line.width);
if (op->data.line.dash_on_length > 0 &&
op->data.line.dash_off_length > 0)
{
double dash_list[2];
dash_list[0] = op->data.line.dash_on_length;
dash_list[1] = op->data.line.dash_off_length;
cairo_set_dash (cr, dash_list, 2, 0);
}
x1 = parse_x_position_unchecked (op->data.line.x1, env);
y1 = parse_y_position_unchecked (op->data.line.y1, env);
if (!op->data.line.x2 &&
!op->data.line.y2 &&
op->data.line.width==0)
{
cairo_rectangle (cr, x1, y1, 1, 1);
cairo_fill (cr);
}
else
{
if (op->data.line.x2)
x2 = parse_x_position_unchecked (op->data.line.x2, env);
else
x2 = x1;
if (op->data.line.y2)
y2 = parse_y_position_unchecked (op->data.line.y2, env);
else
y2 = y1;
/* This is one of the cases where we are matching the exact
* pixel aligned rectangle produced by X; for zero-width lines
* the generic algorithm produces the right result so we don't
* need to handle them here.
*/
if ((y1 == y2 || x1 == x2) && op->data.line.width != 0)
{
double offset = op->data.line.width % 2 ? .5 : 0;
if (y1 == y2)
{
cairo_move_to (cr, x1, y1 + offset);
cairo_line_to (cr, x2, y2 + offset);
}
else
{
cairo_move_to (cr, x1 + offset, y1);
cairo_line_to (cr, x2 + offset, y2);
}
}
else
{
/* zero-width lines include both end-points in X, unlike wide lines */
if (op->data.line.width == 0)
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_move_to (cr, x1 + .5, y1 + .5);
cairo_line_to (cr, x2 + .5, y2 + .5);
}
cairo_stroke (cr);
}
}
break;
case META_DRAW_RECTANGLE:
{
int rx, ry, rwidth, rheight;
meta_color_spec_render (op->data.rectangle.color_spec,
style_gtk, &color);
gdk_cairo_set_source_rgba (cr, &color);
rx = parse_x_position_unchecked (op->data.rectangle.x, env);
ry = parse_y_position_unchecked (op->data.rectangle.y, env);
rwidth = parse_size_unchecked (op->data.rectangle.width, env);
rheight = parse_size_unchecked (op->data.rectangle.height, env);
/* Filled and stroked rectangles are the other cases
* we pixel-align to X rasterization
*/
if (op->data.rectangle.filled)
{
cairo_rectangle (cr, rx, ry, rwidth, rheight);
cairo_fill (cr);
}
else
{
cairo_rectangle (cr, rx + .5, ry + .5, rwidth, rheight);
cairo_stroke (cr);
}
}
break;
case META_DRAW_ARC:
{
int rx, ry, rwidth, rheight;
double start_angle, end_angle;
double center_x, center_y;
meta_color_spec_render (op->data.arc.color_spec, style_gtk, &color);
gdk_cairo_set_source_rgba (cr, &color);
rx = parse_x_position_unchecked (op->data.arc.x, env);
ry = parse_y_position_unchecked (op->data.arc.y, env);
rwidth = parse_size_unchecked (op->data.arc.width, env);
rheight = parse_size_unchecked (op->data.arc.height, env);
start_angle = op->data.arc.start_angle * (M_PI / 180.)
- (.5 * M_PI); /* start at 12 instead of 3 oclock */
end_angle = start_angle + op->data.arc.extent_angle * (M_PI / 180.);
center_x = rx + (double)rwidth / 2. + .5;
center_y = ry + (double)rheight / 2. + .5;
cairo_save (cr);
cairo_translate (cr, center_x, center_y);
cairo_scale (cr, (double)rwidth / 2., (double)rheight / 2.);
if (op->data.arc.extent_angle >= 0)
cairo_arc (cr, 0, 0, 1, start_angle, end_angle);
else
cairo_arc_negative (cr, 0, 0, 1, start_angle, end_angle);
cairo_restore (cr);
if (op->data.arc.filled)
{
cairo_line_to (cr, center_x, center_y);
cairo_fill (cr);
}
else
cairo_stroke (cr);
}
break;
case META_DRAW_CLIP:
break;
case META_DRAW_TINT:
{
int rx, ry, rwidth, rheight;
rx = parse_x_position_unchecked (op->data.tint.x, env);
ry = parse_y_position_unchecked (op->data.tint.y, env);
rwidth = parse_size_unchecked (op->data.tint.width, env);
rheight = parse_size_unchecked (op->data.tint.height, env);
meta_color_spec_render (op->data.tint.color_spec,
style_gtk, &color);
if (op->data.tint.alpha_spec &&
op->data.tint.alpha_spec->n_alphas == 1)
color.alpha = op->data.tint.alpha_spec->alphas[0];
gdk_cairo_set_source_rgba (cr, &color);
cairo_rectangle (cr, rx, ry, rwidth, rheight);
cairo_fill (cr);
}
break;
case META_DRAW_GRADIENT:
{
int rx, ry, rwidth, rheight;
rx = parse_x_position_unchecked (op->data.gradient.x, env);
ry = parse_y_position_unchecked (op->data.gradient.y, env);
rwidth = parse_size_unchecked (op->data.gradient.width, env);
rheight = parse_size_unchecked (op->data.gradient.height, env);
meta_gradient_spec_render (op->data.gradient.gradient_spec,
op->data.gradient.alpha_spec,
cr, style_gtk,
rx, ry, rwidth, rheight);
}
break;
case META_DRAW_IMAGE:
{
int rx, ry, rwidth, rheight;
if (op->data.image.pixbuf == NULL)
break;
env->object_width = gdk_pixbuf_get_width (op->data.image.pixbuf);
env->object_height = gdk_pixbuf_get_height (op->data.image.pixbuf);
rx = parse_x_position_unchecked (op->data.image.x, env);
ry = parse_y_position_unchecked (op->data.image.y, env);
rwidth = parse_size_unchecked (op->data.image.width, env);
rheight = parse_size_unchecked (op->data.image.height, env);
draw_image (cr,
op->data.image.pixbuf,
op->data.image.fill_type,
op->data.image.alpha_spec,
rx, ry, rwidth, rheight);
}
break;
case META_DRAW_GTK_ARROW:
{
int rx, ry, rwidth, rheight;
double angle = 0, size;
rx = parse_x_position_unchecked (op->data.gtk_arrow.x, env);
ry = parse_y_position_unchecked (op->data.gtk_arrow.y, env);
rwidth = parse_size_unchecked (op->data.gtk_arrow.width, env);
rheight = parse_size_unchecked (op->data.gtk_arrow.height, env);
size = MAX(rwidth, rheight);
switch (op->data.gtk_arrow.arrow)
{
case GTK_ARROW_UP:
angle = 0;
break;
case GTK_ARROW_RIGHT:
angle = M_PI / 2;
break;
case GTK_ARROW_DOWN:
angle = M_PI;
break;
case GTK_ARROW_LEFT:
angle = 3 * M_PI / 2;
break;
case GTK_ARROW_NONE:
return;
}
gtk_style_context_set_state (style_gtk, op->data.gtk_arrow.state);
gtk_render_arrow (style_gtk, cr, angle, rx, ry, size);
}
break;
case META_DRAW_GTK_BOX:
{
int rx, ry, rwidth, rheight;
rx = parse_x_position_unchecked (op->data.gtk_box.x, env);
ry = parse_y_position_unchecked (op->data.gtk_box.y, env);
rwidth = parse_size_unchecked (op->data.gtk_box.width, env);
rheight = parse_size_unchecked (op->data.gtk_box.height, env);
gtk_style_context_set_state (style_gtk, op->data.gtk_box.state);
gtk_render_background (style_gtk, cr, rx, ry, rwidth, rheight);
gtk_render_frame (style_gtk, cr, rx, ry, rwidth, rheight);
}
break;
case META_DRAW_GTK_VLINE:
{
int rx, ry1, ry2;
rx = parse_x_position_unchecked (op->data.gtk_vline.x, env);
ry1 = parse_y_position_unchecked (op->data.gtk_vline.y1, env);
ry2 = parse_y_position_unchecked (op->data.gtk_vline.y2, env);
gtk_style_context_set_state (style_gtk, op->data.gtk_vline.state);
gtk_render_line (style_gtk, cr, rx, ry1, rx, ry2);
}
break;
case META_DRAW_ICON:
{
int rx, ry, rwidth, rheight;
GdkPixbuf *src;
rwidth = parse_size_unchecked (op->data.icon.width, env);
rheight = parse_size_unchecked (op->data.icon.height, env);
if (info->mini_icon &&
rwidth < gdk_pixbuf_get_width (info->mini_icon) &&
rheight < gdk_pixbuf_get_height (info->mini_icon))
src = info->mini_icon;
else if (info->icon)
src = info->icon;
else
break;
rx = parse_x_position_unchecked (op->data.icon.x, env);
ry = parse_y_position_unchecked (op->data.icon.y, env);
draw_image (cr, src,
op->data.icon.fill_type,
op->data.icon.alpha_spec,
rx, ry, rwidth, rheight);
}
break;
case META_DRAW_TITLE:
if (info->title_layout)
{
int rx, ry;
PangoRectangle ink_rect, logical_rect;
meta_color_spec_render (op->data.title.color_spec,
style_gtk, &color);
gdk_cairo_set_source_rgba (cr, &color);
rx = parse_x_position_unchecked (op->data.title.x, env);
ry = parse_y_position_unchecked (op->data.title.y, env);
if (op->data.title.ellipsize_width)
{
int ellipsize_width;
int right_bearing;
ellipsize_width = parse_x_position_unchecked (op->data.title.ellipsize_width, env);
/* HACK: parse_x_position_unchecked adds in env->rect.x, subtract out again */
ellipsize_width -= env->rect.x;
pango_layout_set_width (info->title_layout, -1);
pango_layout_get_pixel_extents (info->title_layout,
&ink_rect, &logical_rect);
/* Pango's idea of ellipsization is with respect to the logical rect.
* correct for this, by reducing the ellipsization width by the overflow
* of the un-ellipsized text on the right... it's always the visual
* right we want regardless of bidi, since since the X we pass in to
* cairo_move_to() is always the left edge of the line.
*/
right_bearing = (ink_rect.x + ink_rect.width) - (logical_rect.x + logical_rect.width);
right_bearing = MAX (right_bearing, 0);
ellipsize_width -= right_bearing;
ellipsize_width = MAX (ellipsize_width, 0);
/* Only ellipsizing when necessary is a performance optimization -
* pango_layout_set_width() will force a relayout if it isn't the
* same as the current width of -1.
*/
if (ellipsize_width < logical_rect.width)
pango_layout_set_width (info->title_layout, PANGO_SCALE * ellipsize_width);
}
cairo_move_to (cr, rx, ry);
pango_cairo_show_layout (cr, info->title_layout);
/* Remove any ellipsization we might have set; will short-circuit
* if the width is already -1 */
pango_layout_set_width (info->title_layout, -1);
}
break;
case META_DRAW_OP_LIST:
{
MetaRectangle d_rect;
d_rect.x = parse_x_position_unchecked (op->data.op_list.x, env);
d_rect.y = parse_y_position_unchecked (op->data.op_list.y, env);
d_rect.width = parse_size_unchecked (op->data.op_list.width, env);
d_rect.height = parse_size_unchecked (op->data.op_list.height, env);
meta_draw_op_list_draw_with_style (op->data.op_list.op_list,
style_gtk, cr, info, d_rect);
}
break;
case META_DRAW_TILE:
{
int rx, ry, rwidth, rheight;
int tile_xoffset, tile_yoffset;
MetaRectangle tile;
rx = parse_x_position_unchecked (op->data.tile.x, env);
ry = parse_y_position_unchecked (op->data.tile.y, env);
rwidth = parse_size_unchecked (op->data.tile.width, env);
rheight = parse_size_unchecked (op->data.tile.height, env);
cairo_save (cr);
cairo_rectangle (cr, rx, ry, rwidth, rheight);
cairo_clip (cr);
tile_xoffset = parse_x_position_unchecked (op->data.tile.tile_xoffset, env);
tile_yoffset = parse_y_position_unchecked (op->data.tile.tile_yoffset, env);
/* tile offset should not include x/y */
tile_xoffset -= rect.x;
tile_yoffset -= rect.y;
tile.width = parse_size_unchecked (op->data.tile.tile_width, env);
tile.height = parse_size_unchecked (op->data.tile.tile_height, env);
tile.x = rx - tile_xoffset;
while (tile.x < (rx + rwidth))
{
tile.y = ry - tile_yoffset;
while (tile.y < (ry + rheight))
{
meta_draw_op_list_draw_with_style (op->data.tile.op_list,
style_gtk, cr, info, tile);
tile.y += tile.height;
}
tile.x += tile.width;
}
cairo_restore (cr);
}
break;
}
cairo_restore (cr);
}
void
meta_draw_op_draw_with_style (const MetaDrawOp *op,
GtkStyleContext *style_gtk,
cairo_t *cr,
const MetaDrawInfo *info,
MetaRectangle logical_region)
{
MetaPositionExprEnv env;
fill_env (&env, info, logical_region);
meta_draw_op_draw_with_env (op, style_gtk, cr,
info, logical_region,
&env);
}
/**
* meta_draw_op_list_new: (skip)
*
*/
MetaDrawOpList*
meta_draw_op_list_new (int n_preallocs)
{
MetaDrawOpList *op_list;
g_return_val_if_fail (n_preallocs >= 0, NULL);
op_list = g_new (MetaDrawOpList, 1);
op_list->refcount = 1;
op_list->n_allocated = n_preallocs;
op_list->ops = g_new (MetaDrawOp*, op_list->n_allocated);
op_list->n_ops = 0;
return op_list;
}
void
meta_draw_op_list_ref (MetaDrawOpList *op_list)
{
g_return_if_fail (op_list != NULL);
op_list->refcount += 1;
}
void
meta_draw_op_list_unref (MetaDrawOpList *op_list)
{
g_return_if_fail (op_list != NULL);
g_return_if_fail (op_list->refcount > 0);
op_list->refcount -= 1;
if (op_list->refcount == 0)
{
int i;
for (i = 0; i < op_list->n_ops; i++)
meta_draw_op_free (op_list->ops[i]);
g_free (op_list->ops);
DEBUG_FILL_STRUCT (op_list);
g_free (op_list);
}
}
void
meta_draw_op_list_draw_with_style (const MetaDrawOpList *op_list,
GtkStyleContext *style_gtk,
cairo_t *cr,
const MetaDrawInfo *info,
MetaRectangle rect)
{
int i;
MetaPositionExprEnv env;
if (op_list->n_ops == 0)
return;
fill_env (&env, info, rect);
cairo_save (cr);
for (i = 0; i < op_list->n_ops; i++)
{
MetaDrawOp *op = op_list->ops[i];
if (op->type == META_DRAW_CLIP)
{
cairo_restore (cr);
cairo_rectangle (cr,
parse_x_position_unchecked (op->data.clip.x, &env),
parse_y_position_unchecked (op->data.clip.y, &env),
parse_size_unchecked (op->data.clip.width, &env),
parse_size_unchecked (op->data.clip.height, &env));
cairo_clip (cr);
cairo_save (cr);
}
else if (gdk_cairo_get_clip_rectangle (cr, NULL))
{
meta_draw_op_draw_with_env (op,
style_gtk, cr, info,
rect,
&env);
}
}
cairo_restore (cr);
}
void
meta_draw_op_list_append (MetaDrawOpList *op_list,
MetaDrawOp *op)
{
if (op_list->n_ops == op_list->n_allocated)
{
op_list->n_allocated *= 2;
op_list->ops = g_renew (MetaDrawOp*, op_list->ops, op_list->n_allocated);
}
op_list->ops[op_list->n_ops] = op;
op_list->n_ops += 1;
}
gboolean
meta_draw_op_list_validate (MetaDrawOpList *op_list,
GError **error)
{
g_return_val_if_fail (op_list != NULL, FALSE);
/* empty lists are OK, nothing else to check really */
return TRUE;
}
/* This is not done in validate, since we wouldn't know the name
* of the list to report the error. It might be nice to
* store names inside the list sometime.
*/
gboolean
meta_draw_op_list_contains (MetaDrawOpList *op_list,
MetaDrawOpList *child)
{
int i;
/* mmm, huge tree recursion */
for (i = 0; i < op_list->n_ops; i++)
{
if (op_list->ops[i]->type == META_DRAW_OP_LIST)
{
if (op_list->ops[i]->data.op_list.op_list == child)
return TRUE;
if (meta_draw_op_list_contains (op_list->ops[i]->data.op_list.op_list,
child))
return TRUE;
}
else if (op_list->ops[i]->type == META_DRAW_TILE)
{
if (op_list->ops[i]->data.tile.op_list == child)
return TRUE;
if (meta_draw_op_list_contains (op_list->ops[i]->data.tile.op_list,
child))
return TRUE;
}
}
return FALSE;
}
/**
* meta_frame_style_new:
* @parent: The parent style. Data not filled in here will be
* looked for in the parent style, and in its parent
* style, and so on.
*
* Constructor for a MetaFrameStyle.
*
* Returns: (transfer full): The newly-constructed style.
*/
MetaFrameStyle*
meta_frame_style_new (MetaFrameStyle *parent)
{
MetaFrameStyle *style;
style = g_new0 (MetaFrameStyle, 1);
style->refcount = 1;
/* Default alpha is fully opaque */
style->window_background_alpha = 255;
style->parent = parent;
if (parent)
meta_frame_style_ref (parent);
return style;
}
/**
* meta_frame_style_ref:
* @style: The style.
*
* Increases the reference count of a frame style.
*/
void
meta_frame_style_ref (MetaFrameStyle *style)
{
g_return_if_fail (style != NULL);
style->refcount += 1;
}
static void
free_button_ops (MetaDrawOpList *op_lists[META_BUTTON_TYPE_LAST][META_BUTTON_STATE_LAST])
{
int i, j;
for (i = 0; i < META_BUTTON_TYPE_LAST; i++)
for (j = 0; j < META_BUTTON_STATE_LAST; j++)
if (op_lists[i][j])
meta_draw_op_list_unref (op_lists[i][j]);
}
void
meta_frame_style_unref (MetaFrameStyle *style)
{
g_return_if_fail (style != NULL);
g_return_if_fail (style->refcount > 0);
style->refcount -= 1;
if (style->refcount == 0)
{
int i;
free_button_ops (style->buttons);
for (i = 0; i < META_FRAME_PIECE_LAST; i++)
if (style->pieces[i])
meta_draw_op_list_unref (style->pieces[i]);
if (style->layout)
meta_frame_layout_unref (style->layout);
if (style->window_background_color)
meta_color_spec_free (style->window_background_color);
/* we hold a reference to any parent style */
if (style->parent)
meta_frame_style_unref (style->parent);
DEBUG_FILL_STRUCT (style);
g_free (style);
}
}
static MetaButtonState
map_button_state (MetaButtonType button_type,
const MetaFrameGeometry *fgeom,
int middle_bg_offset,
MetaButtonState button_states[META_BUTTON_TYPE_LAST])
{
MetaButtonFunction function = META_BUTTON_FUNCTION_LAST;
switch (button_type)
{
/* First handle functions, which map directly */
case META_BUTTON_TYPE_SHADE:
case META_BUTTON_TYPE_ABOVE:
case META_BUTTON_TYPE_STICK:
case META_BUTTON_TYPE_UNSHADE:
case META_BUTTON_TYPE_UNABOVE:
case META_BUTTON_TYPE_UNSTICK:
case META_BUTTON_TYPE_MENU:
case META_BUTTON_TYPE_APPMENU:
case META_BUTTON_TYPE_MINIMIZE:
case META_BUTTON_TYPE_MAXIMIZE:
case META_BUTTON_TYPE_CLOSE:
return button_states[button_type];
/* Map position buttons to the corresponding function */
case META_BUTTON_TYPE_RIGHT_LEFT_BACKGROUND:
case META_BUTTON_TYPE_RIGHT_SINGLE_BACKGROUND:
if (fgeom->n_right_buttons > 0)
function = fgeom->button_layout.right_buttons[0];
break;
case META_BUTTON_TYPE_RIGHT_RIGHT_BACKGROUND:
if (fgeom->n_right_buttons > 0)
function = fgeom->button_layout.right_buttons[fgeom->n_right_buttons - 1];
break;
case META_BUTTON_TYPE_RIGHT_MIDDLE_BACKGROUND:
if (middle_bg_offset + 1 < fgeom->n_right_buttons)
function = fgeom->button_layout.right_buttons[middle_bg_offset + 1];
break;
case META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND:
case META_BUTTON_TYPE_LEFT_SINGLE_BACKGROUND:
if (fgeom->n_left_buttons > 0)
function = fgeom->button_layout.left_buttons[0];
break;
case META_BUTTON_TYPE_LEFT_RIGHT_BACKGROUND:
if (fgeom->n_left_buttons > 0)
function = fgeom->button_layout.left_buttons[fgeom->n_left_buttons - 1];
break;
case META_BUTTON_TYPE_LEFT_MIDDLE_BACKGROUND:
if (middle_bg_offset + 1 < fgeom->n_left_buttons)
function = fgeom->button_layout.left_buttons[middle_bg_offset + 1];
break;
case META_BUTTON_TYPE_LAST:
break;
}
if (function != META_BUTTON_FUNCTION_LAST)
return button_states[map_button_function_to_type (function)];
return META_BUTTON_STATE_LAST;
}
static MetaDrawOpList*
get_button (MetaFrameStyle *style,
MetaButtonType type,
MetaButtonState state)
{
MetaDrawOpList *op_list;
MetaFrameStyle *parent;
parent = style;
op_list = NULL;
while (parent && op_list == NULL)
{
op_list = parent->buttons[type][state];
parent = parent->parent;
}
/* We fall back to the side buttons if we don't have
* single button backgrounds, and to middle button
* backgrounds if we don't have the ones on the sides
*/
if (op_list == NULL &&
type == META_BUTTON_TYPE_LEFT_SINGLE_BACKGROUND)
return get_button (style, META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND, state);
if (op_list == NULL &&
type == META_BUTTON_TYPE_RIGHT_SINGLE_BACKGROUND)
return get_button (style, META_BUTTON_TYPE_RIGHT_RIGHT_BACKGROUND, state);
if (op_list == NULL &&
(type == META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND ||
type == META_BUTTON_TYPE_LEFT_RIGHT_BACKGROUND))
return get_button (style, META_BUTTON_TYPE_LEFT_MIDDLE_BACKGROUND,
state);
if (op_list == NULL &&
(type == META_BUTTON_TYPE_RIGHT_LEFT_BACKGROUND ||
type == META_BUTTON_TYPE_RIGHT_RIGHT_BACKGROUND))
return get_button (style, META_BUTTON_TYPE_RIGHT_MIDDLE_BACKGROUND,
state);
/* We fall back to normal if no prelight */
if (op_list == NULL &&
state == META_BUTTON_STATE_PRELIGHT)
return get_button (style, type, META_BUTTON_STATE_NORMAL);
return op_list;
}
void
meta_frame_style_apply_scale (const MetaFrameStyle *style,
PangoFontDescription *font_desc)
{
int size = pango_font_description_get_size (font_desc);
pango_font_description_set_size (font_desc,
MAX (size * style->layout->title_scale, 1));
}
gboolean
meta_frame_style_validate (MetaFrameStyle *style,
guint current_theme_version,
GError **error)
{
int i, j;
g_return_val_if_fail (style != NULL, FALSE);
g_return_val_if_fail (style->layout != NULL, FALSE);
for (i = 0; i < META_BUTTON_TYPE_LAST; i++)
{
/* for now the "positional" buttons are optional */
if (i >= META_BUTTON_TYPE_CLOSE)
{
for (j = 0; j < META_BUTTON_STATE_LAST; j++)
{
if (get_button (style, i, j) == NULL &&
meta_theme_earliest_version_with_button (i) <= current_theme_version
)
{
g_set_error (error, META_THEME_ERROR,
META_THEME_ERROR_FAILED,
_("