386 lines
11 KiB
C
386 lines
11 KiB
C
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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#include <stdio.h>
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#include <stdlib.h>
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#include "shell-xfixes-cursor.h"
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#include <clutter/x11/clutter-x11.h>
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#include <X11/extensions/Xfixes.h>
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/**
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* SECTION:ShellXFixesCursor
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* short_description: Capture/manipulate system mouse cursor.
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*
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* The #ShellXFixesCursor object uses the XFixes extension to show/hide the
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* the system mouse pointer, to grab its image as it changes, and emit a
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* notification when its image changes.
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*/
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struct _ShellXFixesCursorClass
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{
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GObjectClass parent_class;
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};
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struct _ShellXFixesCursor {
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GObject parent;
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ClutterStage *stage;
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gboolean have_xfixes;
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int xfixes_event_base;
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gboolean is_showing;
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CoglHandle *cursor_sprite;
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int cursor_hot_x;
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int cursor_hot_y;
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};
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static void xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor);
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static void xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor);
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static void xfixes_cursor_set_stage (ShellXFixesCursor *xfixes_cursor,
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ClutterStage *stage);
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static void xfixes_cursor_reset_image (ShellXFixesCursor *xfixes_cursor);
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enum {
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PROP_0,
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PROP_STAGE,
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};
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G_DEFINE_TYPE(ShellXFixesCursor, shell_xfixes_cursor, G_TYPE_OBJECT);
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enum {
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CURSOR_CHANGED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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static void
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shell_xfixes_cursor_init (ShellXFixesCursor *xfixes_cursor)
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{
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// (JS) Best (?) that can be assumed since XFixes doesn't provide a way of
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// detecting if the system mouse cursor is showing or not.
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xfixes_cursor->is_showing = TRUE;
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}
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static void
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shell_xfixes_cursor_finalize (GObject *object)
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{
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ShellXFixesCursor *xfixes_cursor = SHELL_XFIXES_CURSOR (object);
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// Make sure the system cursor is showing before leaving the stage.
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xfixes_cursor_show (xfixes_cursor);
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xfixes_cursor_set_stage (xfixes_cursor, NULL);
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if (xfixes_cursor->cursor_sprite != NULL)
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cogl_handle_unref (xfixes_cursor->cursor_sprite);
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G_OBJECT_CLASS (shell_xfixes_cursor_parent_class)->finalize (object);
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}
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static void
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xfixes_cursor_on_stage_destroy (ClutterActor *actor,
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ShellXFixesCursor *xfixes_cursor)
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{
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xfixes_cursor_set_stage (xfixes_cursor, NULL);
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}
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static ClutterX11FilterReturn
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xfixes_cursor_event_filter (XEvent *xev,
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ClutterEvent *cev,
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gpointer data)
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{
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ShellXFixesCursor *xfixes_cursor = data;
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if (xev->xany.window != clutter_x11_get_stage_window (xfixes_cursor->stage))
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return CLUTTER_X11_FILTER_CONTINUE;
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if (xev->xany.type == xfixes_cursor->xfixes_event_base + XFixesCursorNotify)
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{
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XFixesCursorNotifyEvent *notify_event = (XFixesCursorNotifyEvent *)xev;
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if (notify_event->subtype == XFixesDisplayCursorNotify)
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xfixes_cursor_reset_image (xfixes_cursor);
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}
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return CLUTTER_X11_FILTER_CONTINUE;
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}
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static void
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xfixes_cursor_set_stage (ShellXFixesCursor *xfixes_cursor,
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ClutterStage *stage)
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{
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if (xfixes_cursor->stage == stage)
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return;
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if (xfixes_cursor->stage)
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{
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g_signal_handlers_disconnect_by_func (xfixes_cursor->stage,
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(void *)xfixes_cursor_on_stage_destroy,
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xfixes_cursor);
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clutter_x11_remove_filter (xfixes_cursor_event_filter, xfixes_cursor);
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}
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xfixes_cursor->stage = stage;
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if (xfixes_cursor->stage)
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{
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int error_base;
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xfixes_cursor->stage = stage;
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g_signal_connect (xfixes_cursor->stage, "destroy",
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G_CALLBACK (xfixes_cursor_on_stage_destroy), xfixes_cursor);
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clutter_x11_add_filter (xfixes_cursor_event_filter, xfixes_cursor);
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xfixes_cursor->have_xfixes = XFixesQueryExtension (clutter_x11_get_default_display (),
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&xfixes_cursor->xfixes_event_base,
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&error_base);
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if (xfixes_cursor->have_xfixes)
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XFixesSelectCursorInput (clutter_x11_get_default_display (),
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clutter_x11_get_stage_window (stage),
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XFixesDisplayCursorNotifyMask);
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xfixes_cursor_reset_image (xfixes_cursor);
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}
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}
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static void
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xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor)
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{
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int minor, major;
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Display *xdisplay;
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Window xwindow;
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if (xfixes_cursor->is_showing == TRUE)
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return;
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if (!xfixes_cursor->have_xfixes || !xfixes_cursor->stage)
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return;
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xdisplay = clutter_x11_get_default_display ();
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xwindow = clutter_x11_get_stage_window (xfixes_cursor->stage);
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XFixesQueryVersion (xdisplay, &major, &minor);
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if (major >= 4)
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{
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XFixesShowCursor (xdisplay, xwindow);
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xfixes_cursor->is_showing = TRUE;
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}
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}
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static void
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xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor)
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{
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int minor, major;
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Display *xdisplay;
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Window xwindow;
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if (xfixes_cursor->is_showing == FALSE)
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return;
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if (!xfixes_cursor->have_xfixes || !xfixes_cursor->stage)
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return;
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xdisplay = clutter_x11_get_default_display ();
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xwindow = clutter_x11_get_stage_window (xfixes_cursor->stage);
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XFixesQueryVersion (xdisplay, &major, &minor);
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if (major >= 4)
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{
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XFixesHideCursor (xdisplay, xwindow);
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xfixes_cursor->is_showing = FALSE;
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}
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}
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static void
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xfixes_cursor_reset_image (ShellXFixesCursor *xfixes_cursor)
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{
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XFixesCursorImage *cursor_image;
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CoglHandle sprite = COGL_INVALID_HANDLE;
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if (!xfixes_cursor->have_xfixes)
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return;
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cursor_image = XFixesGetCursorImage (clutter_x11_get_default_display ());
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sprite = cogl_texture_new_from_data (cursor_image->width,
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cursor_image->height,
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COGL_TEXTURE_NONE,
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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COGL_PIXEL_FORMAT_BGRA_8888_PRE,
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#else
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COGL_PIXEL_FORMAT_ARGB_8888_PRE,
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#endif
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COGL_PIXEL_FORMAT_ANY,
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cursor_image->width * 4, /* stride */
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(const guint8 *) cursor_image->pixels);
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if (sprite != COGL_INVALID_HANDLE)
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{
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if (xfixes_cursor->cursor_sprite != NULL)
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cogl_handle_unref (xfixes_cursor->cursor_sprite);
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xfixes_cursor->cursor_sprite = sprite;
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xfixes_cursor->cursor_hot_x = cursor_image->xhot;
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xfixes_cursor->cursor_hot_y = cursor_image->yhot;
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g_signal_emit (xfixes_cursor, signals[CURSOR_CHANGED], 0);
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}
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}
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static void
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shell_xfixes_cursor_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ShellXFixesCursor *xfixes_cursor = SHELL_XFIXES_CURSOR (object);
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switch (prop_id)
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{
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case PROP_STAGE:
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xfixes_cursor_set_stage (xfixes_cursor, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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shell_xfixes_cursor_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ShellXFixesCursor *xfixes_cursor = SHELL_XFIXES_CURSOR (object);
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switch (prop_id)
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{
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case PROP_STAGE:
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g_value_set_object (value, G_OBJECT (xfixes_cursor->stage));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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shell_xfixes_cursor_class_init (ShellXFixesCursorClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->finalize = shell_xfixes_cursor_finalize;
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signals[CURSOR_CHANGED] = g_signal_new ("cursor-change",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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gobject_class->get_property = shell_xfixes_cursor_get_property;
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gobject_class->set_property = shell_xfixes_cursor_set_property;
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g_object_class_install_property (gobject_class,
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PROP_STAGE,
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g_param_spec_object ("stage",
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"Stage",
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"Stage for mouse cursor",
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CLUTTER_TYPE_STAGE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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}
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/**
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* shell_xfixes_cursor_get_default:
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*
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* Return value: (transfer none): The global #ShellXFixesCursor singleton
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*/
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ShellXFixesCursor *
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shell_xfixes_cursor_get_default ()
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{
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static ShellXFixesCursor *instance = NULL;
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if (instance == NULL)
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instance = g_object_new (SHELL_TYPE_XFIXES_CURSOR,
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"stage", clutter_stage_get_default (),
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NULL);
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return instance;
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}
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/**
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* shell_xfixes_cursor_hide:
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* @xfixes_cursor: the #ShellXFixesCursor
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*
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* Hide the system mouse cursor.
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*/
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void
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shell_xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor)
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{
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g_return_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor));
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xfixes_cursor_hide (xfixes_cursor);
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}
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/**
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* shell_xfixes_cursor_show:
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* @xfixes_cursor: the #ShellXFixesCursor
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*
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* Show the system mouse cursor to show
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*/
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void
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shell_xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor)
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{
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g_return_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor));
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xfixes_cursor_show (xfixes_cursor);
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}
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/**
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* shell_xfixes_cursor_update_texture_image:
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* @xfixes_cursor: the #ShellXFixesCursor
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* @texture: ClutterTexture to update with the current sprite image.
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*/
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void
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shell_xfixes_cursor_update_texture_image (ShellXFixesCursor *xfixes_cursor,
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ClutterTexture *texture)
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{
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CoglHandle *old_sprite;
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g_return_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor));
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if (texture == NULL)
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return;
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old_sprite = clutter_texture_get_cogl_texture (texture);
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if (xfixes_cursor->cursor_sprite == old_sprite)
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return;
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clutter_texture_set_cogl_texture (texture, xfixes_cursor->cursor_sprite);
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}
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/**
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* shell_xfixes_cursor_get_hot_x:
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* @xfixes_cursor: the #ShellXFixesCursor
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*
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* Returns: the current mouse cursor's hot x-coordinate.
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*/
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int
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shell_xfixes_cursor_get_hot_x (ShellXFixesCursor *xfixes_cursor)
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{
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g_return_val_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor), 0);
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return xfixes_cursor->cursor_hot_x;
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}
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/**
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* shell_xfixes_cursor_get_hot_y:
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* @xfixes_cursor: the #ShellXFixesCursor
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*
|
||
|
|
* Returns: the current mouse cursor's hot y-coordinate.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
shell_xfixes_cursor_get_hot_y (ShellXFixesCursor *xfixes_cursor)
|
||
|
|
{
|
||
|
|
g_return_val_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor), 0);
|
||
|
|
|
||
|
|
return xfixes_cursor->cursor_hot_y;
|
||
|
|
}
|