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-rw-r--r--plugins/mouse/msd-locate-pointer.c504
1 files changed, 504 insertions, 0 deletions
diff --git a/plugins/mouse/msd-locate-pointer.c b/plugins/mouse/msd-locate-pointer.c
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+++ b/plugins/mouse/msd-locate-pointer.c
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+/* msd-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 "msd-timeline.h"
+#include "msd-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 MsdLocatePointerData MsdLocatePointerData;
+
+struct MsdLocatePointerData
+{
+ MsdTimeline *timeline;
+ GtkWidget *widget;
+ GdkWindow *window;
+
+ gdouble progress;
+};
+
+static MsdLocatePointerData *data = NULL;
+
+static void
+locate_pointer_paint (MsdLocatePointerData *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)
+{
+ MsdLocatePointerData *data = (MsdLocatePointerData *) 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 (MsdLocatePointerData *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 (MsdTimeline *timeline,
+ gdouble progress,
+ gpointer user_data)
+{
+ MsdLocatePointerData *data = (MsdLocatePointerData *) 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,
+ MsdLocatePointerData *data)
+{
+ if (!gtk_widget_is_composited (widget))
+ set_transparent_shape (data->window);
+ else
+ unset_transparent_shape (data->window);
+}
+
+static void
+timeline_finished_cb (MsdTimeline *timeline,
+ gpointer user_data)
+{
+ MsdLocatePointerData *data = (MsdLocatePointerData *) 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 (MsdLocatePointerData *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 MsdLocatePointerData *
+msd_locate_pointer_data_new (GdkScreen *screen)
+{
+ MsdLocatePointerData *data;
+
+ data = g_new0 (MsdLocatePointerData, 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 = msd_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 (MsdLocatePointerData *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
+msd_locate_pointer (GdkScreen *screen)
+{
+ if (!data)
+ data = msd_locate_pointer_data_new (screen);
+
+ msd_timeline_pause (data->timeline);
+ msd_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);
+
+ msd_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);
+ msd_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;
+}
+
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