moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 504 insertions, 0 deletions

diff --git a/plugins/mouse/gsd-locate-pointer.c b/plugins/mouse/gsd-locate-pointer.c
new file mode 100644
index 0000000..acb2445
--- /dev/null
+++ b/plugins/mouse/gsd-locate-pointer.c
@@ -0,0 +1,504 @@
+/* gsd-locate-pointer.c
+ *
+ * Copyright (C) 2008 Carlos Garnacho  <[email protected]>
+ *
+ * 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.
+ */
+
+#include <gtk/gtk.h>
+#include "gsd-timeline.h"
+#include "gsd-locate-pointer.h"
+
+#include <gdk/gdkkeysyms.h>
+#include <gdk/gdkx.h>
+#include <X11/keysym.h>
+
+#define ANIMATION_LENGTH 750
+#define WINDOW_SIZE 101
+#define N_CIRCLES 4
+
+/* All circles are supposed to be moving when progress
+ * reaches 0.5, and each of them are supposed to long
+ * for half of the progress, hence the need of 0.5 to
+ * get the circles interval, and the multiplication
+ * by 2 to know a circle progress */
+#define CIRCLES_PROGRESS_INTERVAL (0.5 / N_CIRCLES)
+#define CIRCLE_PROGRESS(p) (MIN (1., ((gdouble) (p) * 2.)))
+
+typedef struct GsdLocatePointerData GsdLocatePointerData;
+
+struct GsdLocatePointerData
+{
+  GsdTimeline *timeline;
+  GtkWidget *widget;
+  GdkWindow *window;
+
+  gdouble progress;
+};
+
+static GsdLocatePointerData *data = NULL;
+
+static void
+locate_pointer_paint (GsdLocatePointerData *data,
+		      cairo_t              *cr,
+		      gboolean              composite)
+{
+  GdkColor color;
+  gdouble progress, circle_progress;
+  gint width, height, i;
+  GtkStyle *style;
+
+  progress = data->progress;
+
+	#if GTK_CHECK_VERSION(3, 0, 0)
+		width = gdk_window_get_width(GDK_WINDOW(data->window));
+		height = gdk_window_get_height(GDK_WINDOW(data->window));
+	#else
+		gdk_drawable_get_size(data->window, &width, &height);
+	#endif
+
+  style = gtk_widget_get_style (data->widget);
+  color = style->bg[GTK_STATE_SELECTED];
+
+  cairo_set_source_rgba (cr, 1., 1., 1., 0.);
+  cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+  cairo_paint (cr);
+
+  for (i = 0; i <= N_CIRCLES; i++)
+    {
+      if (progress < 0.)
+	break;
+
+      circle_progress = MIN (1., (progress * 2));
+      progress -= CIRCLES_PROGRESS_INTERVAL;
+
+      if (circle_progress >= 1.)
+	continue;
+
+      if (composite)
+	{
+	  cairo_set_source_rgba (cr,
+				 color.red / 65535.,
+				 color.green / 65535.,
+				 color.blue / 65535.,
+				 1 - circle_progress);
+	  cairo_arc (cr,
+		     width / 2,
+		     height / 2,
+		     circle_progress * width / 2,
+		     0, 2 * G_PI);
+
+	  cairo_fill (cr);
+	  cairo_stroke (cr);
+	}
+      else
+	{
+	  cairo_set_source_rgb (cr, 0., 0., 0.);
+	  cairo_set_line_width (cr, 3.);
+	  cairo_arc (cr,
+		     width / 2,
+		     height / 2,
+		     circle_progress * width / 2,
+		     0, 2 * G_PI);
+	  cairo_stroke (cr);
+
+	  cairo_set_source_rgb (cr, 1., 1., 1.);
+	  cairo_set_line_width (cr, 1.);
+	  cairo_arc (cr,
+		     width / 2,
+		     height / 2,
+		     circle_progress * width / 2,
+		     0, 2 * G_PI);
+	  cairo_stroke (cr);
+	}
+    }
+}
+
+static gboolean
+locate_pointer_expose (GtkWidget      *widget,
+		       GdkEventExpose *event,
+		       gpointer        user_data)
+{
+  GsdLocatePointerData *data = (GsdLocatePointerData *) user_data;
+  cairo_t *cr;
+
+  if (event->window != data->window)
+    return FALSE;
+
+  cr = gdk_cairo_create (data->window);
+  locate_pointer_paint (data, cr, gtk_widget_is_composited (data->widget));
+  cairo_destroy (cr);
+
+  return TRUE;
+}
+
+static void
+update_shape (GsdLocatePointerData *data)
+{
+  cairo_t *cr;
+  GdkBitmap *mask;
+
+  mask = gdk_pixmap_new (data->window, WINDOW_SIZE, WINDOW_SIZE, 1);
+  cr = gdk_cairo_create (mask);
+  locate_pointer_paint (data, cr, FALSE);
+  gdk_window_shape_combine_mask (data->window, mask, 0, 0);
+  g_object_unref (mask);
+  cairo_destroy (cr);
+}
+
+static void
+timeline_frame_cb (GsdTimeline *timeline,
+		   gdouble      progress,
+		   gpointer     user_data)
+{
+  GsdLocatePointerData *data = (GsdLocatePointerData *) user_data;
+  GdkScreen *screen;
+  gint cursor_x, cursor_y;
+
+  if (gtk_widget_is_composited (data->widget))
+    {
+      gdk_window_invalidate_rect (data->window, NULL, FALSE);
+      data->progress = progress;
+    }
+  else if (progress >= data->progress + CIRCLES_PROGRESS_INTERVAL)
+    {
+      /* only invalidate window each circle interval */
+      update_shape (data);
+      gdk_window_invalidate_rect (data->window, NULL, FALSE);
+      data->progress += CIRCLES_PROGRESS_INTERVAL;
+    }
+
+  screen = gdk_drawable_get_screen (data->window);
+  gdk_window_get_pointer (gdk_screen_get_root_window (screen),
+			  &cursor_x, &cursor_y, NULL);
+  gdk_window_move (data->window,
+                   cursor_x - WINDOW_SIZE / 2,
+                   cursor_y - WINDOW_SIZE / 2);
+}
+
+static void
+set_transparent_shape (GdkWindow *window)
+{
+  GdkBitmap *mask;
+  cairo_t *cr;
+
+  mask = gdk_pixmap_new (data->window, WINDOW_SIZE, WINDOW_SIZE, 1);
+  cr = gdk_cairo_create (mask);
+
+  cairo_set_source_rgba (cr, 1., 1., 1., 0.);
+  cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+  cairo_paint (cr);
+
+  gdk_window_shape_combine_mask (data->window, mask, 0, 0);
+  g_object_unref (mask);
+  cairo_destroy (cr);
+}
+
+static void
+unset_transparent_shape (GdkWindow *window)
+{
+  gdk_window_shape_combine_mask (data->window, NULL, 0, 0);
+}
+
+static void
+composited_changed (GtkWidget            *widget,
+                    GsdLocatePointerData *data)
+{
+  if (!gtk_widget_is_composited (widget))
+    set_transparent_shape (data->window);
+  else
+    unset_transparent_shape (data->window);
+}
+
+static void
+timeline_finished_cb (GsdTimeline *timeline,
+		      gpointer     user_data)
+{
+  GsdLocatePointerData *data = (GsdLocatePointerData *) user_data;
+
+  /* set transparent shape and hide window */
+  if (!gtk_widget_is_composited (data->widget))
+    set_transparent_shape (data->window);
+
+  gdk_window_hide (data->window);
+}
+
+static void
+create_window (GsdLocatePointerData *data,
+	       GdkScreen            *screen)
+{
+  GdkColormap *colormap;
+  GdkVisual *visual;
+  GdkWindowAttr attributes;
+
+  colormap = gdk_screen_get_rgba_colormap (screen);
+  visual = gdk_screen_get_rgba_visual (screen);
+
+  if (!colormap)
+    {
+      colormap = gdk_screen_get_rgb_colormap (screen);
+      visual = gdk_screen_get_rgb_visual (screen);
+    }
+
+  attributes.window_type = GDK_WINDOW_TEMP;
+  attributes.wclass = GDK_INPUT_OUTPUT;
+  attributes.visual = visual;
+  attributes.colormap = colormap;
+  attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK;
+  attributes.width = 1;
+  attributes.height = 1;
+
+  data->window = gdk_window_new (gdk_screen_get_root_window (screen),
+				 &attributes,
+				 GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP);
+
+  gdk_window_set_user_data (data->window, data->widget);
+}
+
+static GsdLocatePointerData *
+gsd_locate_pointer_data_new (GdkScreen *screen)
+{
+  GsdLocatePointerData *data;
+
+  data = g_new0 (GsdLocatePointerData, 1);
+
+  /* this widget will never be shown, it's
+   * mainly used to get signals/events from
+   */
+  data->widget = gtk_window_new (GTK_WINDOW_POPUP);
+  gtk_widget_realize (data->widget);
+
+  g_signal_connect (G_OBJECT (data->widget), "expose_event",
+                    G_CALLBACK (locate_pointer_expose),
+                    data);
+
+  data->timeline = gsd_timeline_new (ANIMATION_LENGTH);
+  g_signal_connect (data->timeline, "frame",
+		    G_CALLBACK (timeline_frame_cb), data);
+  g_signal_connect (data->timeline, "finished",
+		    G_CALLBACK (timeline_finished_cb), data);
+
+  create_window (data, screen);
+
+  return data;
+}
+
+static void
+move_locate_pointer_window (GsdLocatePointerData *data,
+			    GdkScreen            *screen)
+{
+  gint cursor_x, cursor_y;
+  GdkBitmap *mask;
+  GdkColor col;
+  GdkGC *gc;
+
+  gdk_window_get_pointer (gdk_screen_get_root_window (screen), &cursor_x, &cursor_y, NULL);
+
+  gdk_window_move_resize (data->window,
+                          cursor_x - WINDOW_SIZE / 2,
+                          cursor_y - WINDOW_SIZE / 2,
+                          WINDOW_SIZE, WINDOW_SIZE);
+
+  col.pixel = 0;
+  mask = gdk_pixmap_new (data->window, WINDOW_SIZE, WINDOW_SIZE, 1);
+
+  gc = gdk_gc_new (mask);
+  gdk_gc_set_foreground (gc, &col);
+  gdk_draw_rectangle (mask, gc, TRUE, 0, 0, WINDOW_SIZE, WINDOW_SIZE);
+
+  /* allow events to happen through the window */
+  gdk_window_input_shape_combine_mask (data->window, mask, 0, 0);
+
+  g_object_unref (mask);
+  g_object_unref (gc);
+}
+
+void
+gsd_locate_pointer (GdkScreen *screen)
+{
+  if (!data)
+    data = gsd_locate_pointer_data_new (screen);
+
+  gsd_timeline_pause (data->timeline);
+  gsd_timeline_rewind (data->timeline);
+
+  /* Create again the window if it is not for the current screen */
+  if (gdk_screen_get_number (screen) != gdk_screen_get_number (gdk_drawable_get_screen (data->window)))
+    {
+      gdk_window_set_user_data (data->window, NULL);
+      gdk_window_destroy (data->window);
+
+      create_window (data, screen);
+    }
+
+  data->progress = 0.;
+
+  g_signal_connect (data->widget, "composited-changed",
+                    G_CALLBACK (composited_changed), data);
+
+  move_locate_pointer_window (data, screen);
+  composited_changed (data->widget, data);
+  gdk_window_show (data->window);
+
+  gsd_timeline_start (data->timeline);
+}
+
+
+#define KEYBOARD_GROUP_SHIFT 13
+#define KEYBOARD_GROUP_MASK ((1 << 13) | (1 << 14))
+
+/* Owen magic */
+static GdkFilterReturn
+filter (GdkXEvent *xevent,
+        GdkEvent  *event,
+        gpointer   data)
+{
+  XEvent *xev = (XEvent *) xevent;
+  guint keyval;
+  gint group;
+
+  GdkScreen *screen = (GdkScreen *)data;
+
+  if (xev->type == KeyPress || xev->type == KeyRelease)
+    {
+      /* get the keysym */
+      group = (xev->xkey.state & KEYBOARD_GROUP_MASK) >> KEYBOARD_GROUP_SHIFT;
+      gdk_keymap_translate_keyboard_state (gdk_keymap_get_default (),
+                                           xev->xkey.keycode,
+                                           xev->xkey.state,
+                                           group,
+                                           &keyval,
+                                           NULL, NULL, NULL);
+      if (keyval == GDK_Control_L || keyval == GDK_Control_R)
+        {
+          if (xev->type == KeyPress)
+            {
+              XAllowEvents (xev->xkey.display,
+                            SyncKeyboard,
+                            xev->xkey.time);
+            }
+          else
+            {
+              XAllowEvents (xev->xkey.display,
+                            AsyncKeyboard,
+                            xev->xkey.time);
+              gsd_locate_pointer (screen);
+            }
+        }
+      else
+        {
+          XAllowEvents (xev->xkey.display,
+                        ReplayKeyboard,
+                        xev->xkey.time);
+          XUngrabKeyboard (gdk_x11_get_default_xdisplay (),
+                           xev->xkey.time);
+        }
+    }
+
+  return GDK_FILTER_CONTINUE;
+}
+
+static void
+set_locate_pointer (void)
+{
+  GdkKeymapKey *keys;
+  GdkDisplay *display;
+  int n_screens;
+  int n_keys;
+  gboolean has_entries;
+  static const guint keyvals[] = { GDK_Control_L, GDK_Control_R };
+  unsigned j;
+
+  display = gdk_display_get_default ();
+  n_screens = gdk_display_get_n_screens (display);
+
+  for (j = 0 ; j < G_N_ELEMENTS (keyvals) ; j++)
+    {
+      has_entries = gdk_keymap_get_entries_for_keyval (gdk_keymap_get_default (),
+                                                       keyvals[j],
+                                                       &keys,
+                                                       &n_keys);
+      if (has_entries)
+        {
+          gint i, j;
+          for (i = 0; i < n_keys; i++)
+            {
+              for (j=0; j< n_screens; j++)
+                {
+                  GdkScreen *screen;
+                  Window xroot;
+
+                  screen = gdk_display_get_screen (display, j);
+                  xroot = gdk_x11_drawable_get_xid (gdk_screen_get_root_window (screen));
+
+                  XGrabKey (GDK_DISPLAY_XDISPLAY (display),
+                            keys[i].keycode,
+                            0,
+                            xroot,
+                            False,
+                            GrabModeAsync,
+                            GrabModeSync);
+                  XGrabKey (GDK_DISPLAY_XDISPLAY (display),
+                            keys[i].keycode,
+                            LockMask,
+                            xroot,
+                            False,
+                            GrabModeAsync,
+                            GrabModeSync);
+                  XGrabKey (GDK_DISPLAY_XDISPLAY (display),
+                            keys[i].keycode,
+                            Mod2Mask,
+                            xroot,
+                            False,
+                            GrabModeAsync,
+                            GrabModeSync);
+                  XGrabKey (GDK_DISPLAY_XDISPLAY (display),
+                            keys[i].keycode,
+                            Mod4Mask,
+                            xroot,
+                            False,
+                            GrabModeAsync,
+                            GrabModeSync);
+                }
+            }
+
+          g_free (keys);
+
+          for (i = 0; i < n_screens; i++)
+            {
+              GdkScreen *screen;
+
+              screen = gdk_display_get_screen (display, i);
+              gdk_window_add_filter (gdk_screen_get_root_window (screen),
+                                     filter,
+                                     screen);
+            }
+        }
+    }
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  gtk_init (&argc, &argv);
+
+  set_locate_pointer ();
+
+  gtk_main ();
+
+  return 0;
+}
+