1 files changed, 516 insertions, 0 deletions
diff --git a/mate-panel/panel-struts.c b/mate-panel/panel-struts.c
new file mode 100644
index 00000000..b75bf704
--- /dev/null
+++ b/mate-panel/panel-struts.c
@@ -0,0 +1,516 @@
+/*
+ * Copyright (C) 2003 Sun Microsystems, Inc.
+ * Copyright (C) 2003,2004 Rob Adams
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+
+ * Authors:
+ * Mark McLoughlin <[email protected]>
+ */
+
+#include <config.h>
+
+#include "panel-struts.h"
+
+#include "panel-multiscreen.h"
+#include "panel-xutils.h"
+
+
+typedef struct {
+ PanelToplevel *toplevel;
+
+ GdkScreen *screen;
+ int monitor;
+ 
+ PanelOrientation orientation;
+ GdkRectangle geometry;
+ int strut_size;
+ int strut_start;
+ int strut_end;
+
+ GdkRectangle allocated_geometry;
+ int allocated_strut_size;
+ int allocated_strut_start;
+ int allocated_strut_end;
+} PanelStrut;
+
+
+static GSList *panel_struts_list = NULL;
+
+
+static inline PanelStrut *
+panel_struts_find_strut (PanelToplevel *toplevel)
+{
+ GSList *l;
+
+ for (l = panel_struts_list; l; l = l->next) {
+ PanelStrut *strut = l->data;
+
+ if (strut->toplevel == toplevel)
+ break;
+ }
+
+ return l ? l->data : NULL;
+}
+
+static void
+panel_struts_get_monitor_geometry (GdkScreen *screen,
+ int monitor,
+ int *x,
+ int *y,
+ int *width,
+ int *height)
+{
+ *x = panel_multiscreen_x (screen, monitor);
+ *y = panel_multiscreen_y (screen, monitor);
+ *width = panel_multiscreen_width (screen, monitor);
+ *height = panel_multiscreen_height (screen, monitor);
+}
+
+static PanelStrut *
+panel_struts_intersect (GSList *struts,
+ GdkRectangle *geometry,
+ int skip)
+{
+ GSList *l;
+ int i;
+
+ i = 0;
+ for (l = struts; l; l = l->next) {
+ PanelStrut *strut = l->data;
+ int x1, y1, x2, y2;
+
+ x1 = MAX (strut->allocated_geometry.x, geometry->x);
+ y1 = MAX (strut->allocated_geometry.y, geometry->y);
+
+ x2 = MIN (strut->allocated_geometry.x + strut->allocated_geometry.width,
+ geometry->x + geometry->width);
+ y2 = MIN (strut->allocated_geometry.y + strut->allocated_geometry.height,
+ geometry->y + geometry->height);
+
+ if (x2 - x1 > 0 && y2 - y1 > 0 && ++i > skip)
+ break;
+ }
+
+ return l ? l->data : NULL;
+}
+
+static int
+panel_struts_allocation_overlapped (PanelStrut *strut,
+ PanelStrut *overlap,
+ GdkRectangle *geometry,
+ gboolean *moved_down,
+ int skip)
+{
+ int overlap_x1, overlap_y1, overlap_x2, overlap_y2;
+
+ overlap_x1 = overlap->allocated_geometry.x;
+ overlap_y1 = overlap->allocated_geometry.y;
+ overlap_x2 = overlap->allocated_geometry.x + overlap->allocated_geometry.width;
+ overlap_y2 = overlap->allocated_geometry.y + overlap->allocated_geometry.height;
+
+ if (strut->orientation == overlap->orientation) {
+ int old_x, old_y;
+
+ old_x = geometry->x;
+ old_y = geometry->y;
+
+ switch (strut->orientation) {
+ case PANEL_ORIENTATION_TOP:
+ geometry->y = overlap_y2;
+ strut->allocated_strut_size += geometry->y - old_y;
+ break;
+ case PANEL_ORIENTATION_BOTTOM:
+ geometry->y = overlap_y1 - geometry->height;
+ strut->allocated_strut_size += old_y - geometry->y;
+ break;
+ case PANEL_ORIENTATION_LEFT:
+ geometry->x = overlap_x2;
+ strut->allocated_strut_size += geometry->x - old_x;
+ break;
+ case PANEL_ORIENTATION_RIGHT:
+ geometry->x = overlap_x1 - geometry->width;
+ strut->allocated_strut_size += old_x - geometry->x;
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+ } else {
+ if (strut->orientation & PANEL_HORIZONTAL_MASK ||
+ overlap->orientation & PANEL_VERTICAL_MASK)
+ return ++skip;
+
+ switch (overlap->orientation) {
+ case PANEL_ORIENTATION_TOP:
+ geometry->y = overlap_y2;
+ *moved_down = TRUE;
+ break;
+ case PANEL_ORIENTATION_BOTTOM:
+ if (!*moved_down)
+ geometry->y = overlap_y1 - geometry->height;
+ else if (overlap_y1 > geometry->y)
+ geometry->height = overlap_y1 - geometry->y;
+ else
+ return ++skip;
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ strut->allocated_strut_start = geometry->y;
+ strut->allocated_strut_end = geometry->y + geometry->height - 1;
+ }
+
+ return skip;
+}
+
+static gboolean
+panel_struts_allocate_struts (PanelToplevel *toplevel,
+ GdkScreen *screen,
+ int monitor)
+{
+ GSList *allocated = NULL;
+ GSList *l;
+ gboolean toplevel_changed = FALSE;
+
+ for (l = panel_struts_list; l; l = l->next) {
+ PanelStrut *strut = l->data;
+ PanelStrut *overlap;
+ GdkRectangle geometry;
+ int monitor_x, monitor_y;
+ int monitor_width, monitor_height;
+ gboolean moved_down;
+ int skip;
+
+ if (strut->screen != screen || strut->monitor != monitor)
+ continue;
+
+ panel_struts_get_monitor_geometry (strut->screen, strut->monitor,
+ &monitor_x, &monitor_y,
+ &monitor_width, &monitor_height);
+
+ strut->allocated_strut_size = strut->strut_size;
+ strut->allocated_strut_start = strut->strut_start;
+ strut->allocated_strut_end = strut->strut_end;
+
+ geometry = strut->geometry;
+
+ moved_down = FALSE;
+ skip = 0;
+ while ((overlap = panel_struts_intersect (allocated, &geometry, skip)))
+ skip = panel_struts_allocation_overlapped (
+ strut, overlap, &geometry, &moved_down, skip);
+
+ if (strut->orientation & PANEL_VERTICAL_MASK) {
+ if (geometry.y < monitor_y) {
+ geometry.height = geometry.y + geometry.height - monitor_y;
+ geometry.y = monitor_y;
+ }
+ 
+ if (geometry.y + geometry.height > monitor_y + monitor_height)
+ geometry.height = monitor_y + monitor_height - geometry.y;
+ }
+
+ if (strut->allocated_geometry.x != geometry.x ||
+ strut->allocated_geometry.y != geometry.y ||
+ strut->allocated_geometry.width != geometry.width ||
+ strut->allocated_geometry.height != geometry.height) {
+ strut->allocated_geometry = geometry;
+
+ if (strut->toplevel == toplevel)
+ toplevel_changed = TRUE;
+ else
+ gtk_widget_queue_resize (GTK_WIDGET (strut->toplevel));
+ }
+
+ allocated = g_slist_append (allocated, strut);
+ }
+
+ g_slist_free (allocated);
+
+ return toplevel_changed;
+}
+
+void
+panel_struts_set_window_hint (PanelToplevel *toplevel)
+{
+ GtkWidget *widget;
+ PanelStrut *strut;
+ int strut_size;
+ int monitor_x, monitor_y, monitor_width, monitor_height;
+ int screen_width, screen_height;
+ int leftmost, rightmost, topmost, bottommost;
+
+ widget = GTK_WIDGET (toplevel);
+
+ if (!gtk_widget_get_realized (widget))
+ return;
+
+ if (!(strut = panel_struts_find_strut (toplevel))) {
+ panel_struts_unset_window_hint (toplevel);
+ return;
+ }
+
+ strut_size = strut->allocated_strut_size;
+
+ screen_width = gdk_screen_get_width (strut->screen);
+ screen_height = gdk_screen_get_height (strut->screen);
+
+ panel_struts_get_monitor_geometry (strut->screen,
+ strut->monitor,
+ &monitor_x,
+ &monitor_y,
+ &monitor_width,
+ &monitor_height);
+
+ panel_multiscreen_is_at_visible_extreme (strut->screen,
+ strut->monitor,
+ &leftmost,
+ &rightmost,
+ &topmost,
+ &bottommost);
+
+ switch (strut->orientation) {
+ case PANEL_ORIENTATION_TOP:
+ if (monitor_y > 0)
+ strut_size += monitor_y;
+ if (!topmost) strut_size = 0;
+ break;
+ case PANEL_ORIENTATION_BOTTOM:
+ if (monitor_y + monitor_height < screen_height)
+ strut_size += screen_height - (monitor_y + monitor_height);
+ if (!bottommost) strut_size = 0;
+ break;
+ case PANEL_ORIENTATION_LEFT:
+ if (leftmost && monitor_x > 0)
+ strut_size += monitor_x;
+ if (!leftmost) strut_size = 0;
+ break;
+ case PANEL_ORIENTATION_RIGHT:
+ if (monitor_x + monitor_width < screen_width)
+ strut_size += screen_width - (monitor_x + monitor_width);
+ if (!rightmost) strut_size = 0;
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ panel_xutils_set_strut (gtk_widget_get_window (widget),
+ strut->orientation,
+ strut_size,
+ strut->allocated_strut_start,
+ strut->allocated_strut_end);
+}
+
+void
+panel_struts_unset_window_hint (PanelToplevel *toplevel)
+{
+ if (!gtk_widget_get_realized (GTK_WIDGET (toplevel)))
+ return;
+
+ panel_xutils_set_strut (gtk_widget_get_window (GTK_WIDGET (toplevel)), 0, 0, 0, 0);
+}
+
+static inline int
+orientation_to_order (PanelOrientation orientation)
+{
+ switch (orientation) {
+ case PANEL_ORIENTATION_TOP:
+ return 1;
+ case PANEL_ORIENTATION_BOTTOM:
+ return 2;
+ case PANEL_ORIENTATION_LEFT:
+ return 3;
+ case PANEL_ORIENTATION_RIGHT:
+ return 4;
+ default:
+ g_assert_not_reached ();
+ return -1;
+ }
+}
+
+static inline int
+get_toplevel_depth (PanelToplevel *toplevel)
+{
+ int depth = 0;
+
+ while ((toplevel = panel_toplevel_get_attach_toplevel (toplevel)))
+ depth++;
+
+ return depth;
+}
+
+/* Sort in order of
+ * 1) screen
+ * 2) monitor
+ * 3) depth (for drawers)
+ * 4) top, bottom, left, right
+ * 5) strut_start ascending
+ * 6) strut_end descending
+ */
+static int
+panel_struts_compare (const PanelStrut *s1,
+ const PanelStrut *s2)
+{
+ int s1_depth;
+ int s2_depth;
+
+ if (s1->screen != s2->screen)
+ return gdk_screen_get_number (s1->screen) -
+ gdk_screen_get_number (s2->screen);
+
+ if (s1->monitor != s2->monitor)
+ return s1->monitor - s2->monitor;
+
+ s1_depth = get_toplevel_depth (s1->toplevel);
+ s2_depth = get_toplevel_depth (s2->toplevel);
+ if (s1_depth != s2_depth)
+ return s2_depth - s1_depth;
+
+ if (s1->orientation != s2->orientation)
+ return orientation_to_order (s1->orientation) -
+ orientation_to_order (s2->orientation);
+
+ if (s1->strut_start != s2->strut_start)
+ return s1->strut_start - s2->strut_start;
+
+ if (s1->strut_end != s2->strut_end)
+ return s2->strut_end - s1->strut_end;
+
+ return 0;
+}
+
+gboolean
+panel_struts_register_strut (PanelToplevel *toplevel,
+ GdkScreen *screen,
+ int monitor,
+ PanelOrientation orientation,
+ int strut_size,
+ int strut_start,
+ int strut_end)
+{
+ PanelStrut *strut;
+ gboolean new_strut = FALSE;
+ int monitor_x, monitor_y, monitor_width, monitor_height;
+
+ if (!(strut = panel_struts_find_strut (toplevel))) {
+ strut = g_new0 (PanelStrut, 1);
+ new_strut = TRUE;
+
+ } else if (strut->toplevel == toplevel &&
+ strut->orientation == orientation &&
+ strut->screen == screen &&
+ strut->monitor == monitor &&
+ strut->strut_size == strut_size &&
+ strut->strut_start == strut_start &&
+ strut->strut_end == strut_end)
+ return FALSE;
+
+ strut->toplevel = toplevel;
+ strut->orientation = orientation;
+ strut->screen = screen;
+ strut->monitor = monitor;
+ strut->strut_size = strut_size;
+ strut->strut_start = strut_start;
+ strut->strut_end = strut_end;
+ 
+ panel_struts_get_monitor_geometry (screen, monitor,
+ &monitor_x, &monitor_y,
+ &monitor_width, &monitor_height);
+
+ switch (strut->orientation) {
+ case PANEL_ORIENTATION_TOP:
+ strut->geometry.x = strut->strut_start;
+ strut->geometry.y = monitor_y;
+ strut->geometry.width = strut->strut_end - strut->strut_start + 1;
+ strut->geometry.height = strut->strut_size;
+ break;
+ case PANEL_ORIENTATION_BOTTOM:
+ strut->geometry.x = strut->strut_start;
+ strut->geometry.y = monitor_y + monitor_height - strut->strut_size;
+ strut->geometry.width = strut->strut_end - strut->strut_start + 1;
+ strut->geometry.height = strut->strut_size;
+ break;
+ case PANEL_ORIENTATION_LEFT:
+ strut->geometry.x = monitor_x;
+ strut->geometry.y = strut->strut_start;
+ strut->geometry.width = strut->strut_size;
+ strut->geometry.height = strut->strut_end - strut->strut_start + 1;
+ break;
+ case PANEL_ORIENTATION_RIGHT:
+ strut->geometry.x = monitor_x + monitor_width - strut->strut_size;
+ strut->geometry.y = strut->strut_start;
+ strut->geometry.width = strut->strut_size;
+ strut->geometry.height = strut->strut_end - strut->strut_start + 1;
+ break;
+ }
+
+ if (new_strut)
+ panel_struts_list = g_slist_append (panel_struts_list, strut);
+
+ panel_struts_list = g_slist_sort (panel_struts_list,
+ (GCompareFunc) panel_struts_compare);
+
+ return panel_struts_allocate_struts (toplevel, screen, monitor);
+}
+
+void
+panel_struts_unregister_strut (PanelToplevel *toplevel)
+{
+ PanelStrut *strut;
+ GdkScreen *screen;
+ int monitor;
+
+ if (!(strut = panel_struts_find_strut (toplevel)))
+ return;
+
+ screen = strut->screen;
+ monitor = strut->monitor;
+
+ panel_struts_list = g_slist_remove (panel_struts_list, strut);
+ g_free (strut);
+
+ panel_struts_allocate_struts (toplevel, screen, monitor);
+}
+
+gboolean
+panel_struts_update_toplevel_geometry (PanelToplevel *toplevel,
+ int *x,
+ int *y,
+ int *width,
+ int *height)
+{
+ PanelStrut *strut;
+
+ g_return_val_if_fail (x != NULL, FALSE);
+ g_return_val_if_fail (y != NULL, FALSE);
+ 
+ if (!(strut = panel_struts_find_strut (toplevel)))
+ return FALSE;
+
+ *x += strut->allocated_geometry.x - strut->geometry.x;
+ *y += strut->allocated_geometry.y - strut->geometry.y;
+
+ if (width != NULL && *width != -1)
+ *width += strut->allocated_geometry.width - strut->geometry.width;
+ if (height != NULL && *height != -1)
+ *height += strut->allocated_geometry.height - strut->geometry.height;
+
+ return TRUE;
+}