308 lines
7.3 KiB
C
308 lines
7.3 KiB
C
/* Metacity window placement */
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/*
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* Copyright (C) 2001 Havoc Pennington
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "place.h"
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#include "workspace.h"
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#include <gdk/gdkregion.h>
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#include <math.h>
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static gint
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northwestcmp (gconstpointer a, gconstpointer b)
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{
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MetaWindow *aw = (gpointer) a;
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MetaWindow *bw = (gpointer) b;
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int from_origin_a;
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int from_origin_b;
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int ax, ay, bx, by;
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/* we're interested in the frame position for cascading,
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* not meta_window_get_position()
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*/
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if (aw->frame)
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{
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ax = aw->frame->rect.x;
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ay = aw->frame->rect.y;
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}
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else
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{
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ax = aw->rect.x;
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ay = aw->rect.y;
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}
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if (bw->frame)
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{
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bx = bw->frame->rect.x;
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by = bw->frame->rect.y;
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}
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else
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{
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bx = bw->rect.x;
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by = bw->rect.y;
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}
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/* probably there's a fast good-enough-guess we could use here. */
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from_origin_a = sqrt (ax * ax + ay * ay);
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from_origin_b = sqrt (bx * bx + by * by);
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if (from_origin_a < from_origin_b)
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return -1;
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else if (from_origin_a > from_origin_b)
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return 1;
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else
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return 0;
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}
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static void
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find_next_cascade (MetaWindow *window,
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MetaFrameGeometry *fgeom,
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/* visible windows on relevant workspaces */
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GList *windows,
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int x,
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int y,
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int *new_x,
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int *new_y)
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{
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GList *tmp;
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GList *sorted;
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int cascade_x, cascade_y;
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int x_threshold, y_threshold;
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sorted = g_list_copy (windows);
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sorted = g_list_sort (sorted, northwestcmp);
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/* This is a "fuzzy" cascade algorithm.
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* For each window in the list, we find where we'd cascade a
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* new window after it. If a window is already nearly at that
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* position, we move on.
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*/
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/* Find furthest-SE origin of all workspaces.
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* cascade_x, cascade_y are the target position
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* of NW corner of window frame.
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*/
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cascade_x = 0;
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cascade_y = 0;
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tmp = window->workspaces;
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while (tmp != NULL)
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{
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MetaWorkspace *space = tmp->data;
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cascade_x = MAX (cascade_x, space->workarea.x);
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cascade_y = MAX (cascade_y, space->workarea.y);
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tmp = tmp->next;
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}
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/* Find first cascade position that's not used. */
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/* arbitrary-ish threshold, honors user attempts to
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* manually cascade.
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*/
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if (fgeom)
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{
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x_threshold = MAX (fgeom->left_width, 10);
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y_threshold = MAX (fgeom->top_height, 10);
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}
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else
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{
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x_threshold = 10;
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y_threshold = 10;
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}
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tmp = sorted;
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while (tmp != NULL)
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{
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MetaWindow *w;
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int wx, wy;
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w = tmp->data;
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/* we want frame position, not window position */
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if (w->frame)
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{
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wx = w->frame->rect.x;
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wy = w->frame->rect.y;
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}
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else
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{
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wx = w->rect.x;
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wy = w->rect.y;
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}
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if (ABS (wx - cascade_x) < x_threshold &&
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ABS (wy - cascade_y) < y_threshold)
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{
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/* This window is "in the way", move to next cascade
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* point. The new window frame should go at the origin
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* of the client window we're stacking above.
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*/
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meta_window_get_position (w, &wx, &wy);
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cascade_x = wx;
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cascade_y = wy;
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}
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else
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goto found; /* no window at this cascade point. */
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tmp = tmp->next;
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}
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/* cascade_x and cascade_y will match the last window in the list. */
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found:
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g_list_free (sorted);
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/* Convert coords to position of window, not position of frame. */
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if (fgeom == NULL)
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{
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*new_x = cascade_x;
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*new_y = cascade_y;
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}
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else
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{
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*new_x = cascade_x + fgeom->left_width;
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*new_y = cascade_y + fgeom->top_height;
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}
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}
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/* Find the leftmost, then topmost, empty area on the workspace
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* that can contain the new window.
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*/
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static gboolean
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find_first_fit (MetaWindow *window,
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MetaFrameGeometry *fgeom,
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/* visible windows on relevant workspaces */
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GList *windows,
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int x,
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int y,
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int *new_x,
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int *new_y)
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{
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}
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void
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meta_window_place (MetaWindow *window,
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MetaFrameGeometry *fgeom,
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int x,
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int y,
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int *new_x,
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int *new_y)
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{
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GList *windows;
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/* frame member variables should NEVER be used in here, only
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* MetaFrameGeometry. But remember fgeom == NULL
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* for undecorated windows.
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*/
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meta_verbose ("Placing window %s\n", window->desc);
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if (window->xtransient_for != None)
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{
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/* Center horizontally, at top of parent vertically */
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MetaWindow *parent;
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parent =
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meta_display_lookup_x_window (window->display,
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window->xtransient_for);
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if (parent)
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{
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int w;
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meta_window_get_position (parent, &x, &y);
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w = parent->rect.width;
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/* center of parent */
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x = x + w / 2;
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/* center of child over center of parent */
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x -= window->rect.width / 2;
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if (fgeom)
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y += fgeom->top_height;
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meta_verbose ("Centered window %s over transient parent\n",
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window->desc);
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goto done;
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}
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}
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if (window->type == META_WINDOW_DIALOG ||
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window->type == META_WINDOW_MODAL_DIALOG)
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{
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/* Center on screen */
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int w, h;
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/* I think whole screen will look nicer than workarea */
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w = WidthOfScreen (window->screen->xscreen);
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h = HeightOfScreen (window->screen->xscreen);
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x = (w - window->rect.width) / 2;
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y = (y - window->rect.height) / 2;
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meta_verbose ("Centered window %s on screen\n",
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window->desc);
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goto done;
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}
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/* Find windows that matter (not minimized, on same workspace
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* as placed window, may be shaded - if shaded we pretend it isn't
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* for placement purposes)
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*/
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windows = NULL;
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{
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GSList *all_windows;
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GSList *tmp;
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all_windows = meta_display_list_windows (window->display);
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tmp = all_windows;
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while (tmp != NULL)
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{
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MetaWindow *w = tmp->data;
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if (!w->minimized &&
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w != window &&
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meta_window_shares_some_workspace (window, w))
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windows = g_list_prepend (windows, w);
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tmp = tmp->next;
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}
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}
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/* "Origin" placement algorithm */
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x = 0;
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y = 0;
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/* Cascade */
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find_next_cascade (window, fgeom, windows, x, y, &x, &y);
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g_list_free (windows);
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done:
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*new_x = x;
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*new_y = y;
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}
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