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

1 files changed, 573 insertions, 0 deletions

diff --git a/plugins/common/gsd-osd-window.c b/plugins/common/gsd-osd-window.c
new file mode 100644
index 0000000..03ca316
--- /dev/null
+++ b/plugins/common/gsd-osd-window.c
@@ -0,0 +1,573 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * On-screen-display (OSD) window for mate-settings-daemon's plugins
+ *
+ * Copyright (C) 2006-2007 William Jon McCann <[email protected]> 
+ * Copyright (C) 2009 Novell, Inc
+ *
+ * Authors:
+ *   William Jon McCann <[email protected]>
+ *   Federico Mena-Quintero <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2, 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 Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser 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 "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include "gsd-osd-window.h"
+
+#define DIALOG_TIMEOUT 2000     /* dialog timeout in ms */
+#define DIALOG_FADE_TIMEOUT 1500 /* timeout before fade starts */
+#define FADE_TIMEOUT 10        /* timeout in ms between each frame of the fade */
+
+#define BG_ALPHA 0.75
+
+#define GSD_OSD_WINDOW_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSD_TYPE_OSD_WINDOW, GsdOsdWindowPrivate))
+
+struct GsdOsdWindowPrivate
+{
+        guint                    is_composited : 1;
+        guint                    hide_timeout_id;
+        guint                    fade_timeout_id;
+        double                   fade_out_alpha;
+};
+
+enum {
+        EXPOSE_WHEN_COMPOSITED,
+        LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (GsdOsdWindow, gsd_osd_window, GTK_TYPE_WINDOW)
+
+static gboolean
+fade_timeout (GsdOsdWindow *window)
+{
+        if (window->priv->fade_out_alpha <= 0.0) {
+                gtk_widget_hide (GTK_WIDGET (window));
+
+                /* Reset it for the next time */
+                window->priv->fade_out_alpha = 1.0;
+                window->priv->fade_timeout_id = 0;
+
+                return FALSE;
+        } else {
+                GdkRectangle rect;
+                GtkWidget *win = GTK_WIDGET (window);
+                GtkAllocation allocation;
+
+                window->priv->fade_out_alpha -= 0.10;
+
+                rect.x = 0;
+                rect.y = 0;
+                gtk_widget_get_allocation (win, &allocation);
+                rect.width = allocation.width;
+                rect.height = allocation.height;
+
+                gtk_widget_realize (win);
+                gdk_window_invalidate_rect (gtk_widget_get_window (win), &rect, FALSE);
+        }
+
+        return TRUE;
+}
+
+static gboolean
+hide_timeout (GsdOsdWindow *window)
+{
+        if (window->priv->is_composited) {
+                window->priv->hide_timeout_id = 0;
+                window->priv->fade_timeout_id = g_timeout_add (FADE_TIMEOUT,
+                                                               (GSourceFunc) fade_timeout,
+                                                               window);
+        } else {
+                gtk_widget_hide (GTK_WIDGET (window));
+        }
+
+        return FALSE;
+}
+
+static void
+remove_hide_timeout (GsdOsdWindow *window)
+{
+        if (window->priv->hide_timeout_id != 0) {
+                g_source_remove (window->priv->hide_timeout_id);
+                window->priv->hide_timeout_id = 0;
+        }
+
+        if (window->priv->fade_timeout_id != 0) {
+                g_source_remove (window->priv->fade_timeout_id);
+                window->priv->fade_timeout_id = 0;
+                window->priv->fade_out_alpha = 1.0;
+        }
+}
+
+static void
+add_hide_timeout (GsdOsdWindow *window)
+{
+        int timeout;
+
+        if (window->priv->is_composited) {
+                timeout = DIALOG_FADE_TIMEOUT;
+        } else {
+                timeout = DIALOG_TIMEOUT;
+        }
+        window->priv->hide_timeout_id = g_timeout_add (timeout,
+                                                       (GSourceFunc) hide_timeout,
+                                                       window);
+}
+
+void
+gsd_osd_window_draw_rounded_rectangle (cairo_t* cr,
+                                       gdouble  aspect,
+                                       gdouble  x,
+                                       gdouble  y,
+                                       gdouble  corner_radius,
+                                       gdouble  width,
+                                       gdouble  height)
+{
+        gdouble radius = corner_radius / aspect;
+
+        cairo_move_to (cr, x + radius, y);
+
+        cairo_line_to (cr,
+                       x + width - radius,
+                       y);
+        cairo_arc (cr,
+                   x + width - radius,
+                   y + radius,
+                   radius,
+                   -90.0f * G_PI / 180.0f,
+                   0.0f * G_PI / 180.0f);
+        cairo_line_to (cr,
+                       x + width,
+                       y + height - radius);
+        cairo_arc (cr,
+                   x + width - radius,
+                   y + height - radius,
+                   radius,
+                   0.0f * G_PI / 180.0f,
+                   90.0f * G_PI / 180.0f);
+        cairo_line_to (cr,
+                       x + radius,
+                       y + height);
+        cairo_arc (cr,
+                   x + radius,
+                   y + height - radius,
+                   radius,
+                   90.0f * G_PI / 180.0f,
+                   180.0f * G_PI / 180.0f);
+        cairo_line_to (cr,
+                       x,
+                       y + radius);
+        cairo_arc (cr,
+                   x + radius,
+                   y + radius,
+                   radius,
+                   180.0f * G_PI / 180.0f,
+                   270.0f * G_PI / 180.0f);
+        cairo_close_path (cr);
+}
+
+void
+gsd_osd_window_color_reverse (const GdkColor *a,
+                              GdkColor       *b)
+{
+        gdouble red;
+        gdouble green;
+        gdouble blue;
+        gdouble h;
+        gdouble s;
+        gdouble v;
+
+        red = (gdouble) a->red / 65535.0;
+        green = (gdouble) a->green / 65535.0;
+        blue = (gdouble) a->blue / 65535.0;
+
+        gtk_rgb_to_hsv (red, green, blue, &h, &s, &v);
+
+        v = 0.5 + (0.5 - v);
+        if (v > 1.0)
+                v = 1.0;
+        else if (v < 0.0)
+                v = 0.0;
+
+        gtk_hsv_to_rgb (h, s, v, &red, &green, &blue);
+
+        b->red = red * 65535.0;
+        b->green = green * 65535.0;
+        b->blue = blue * 65535.0;
+}
+
+/* This is our expose-event handler when the window is in a compositing manager.
+ * We draw everything by hand, using Cairo, so that we can have a nice
+ * transparent/rounded look.
+ */
+static void
+expose_when_composited (GtkWidget *widget, GdkEventExpose *event)
+{
+	GsdOsdWindow    *window;
+        cairo_t         *context;
+        cairo_t         *cr;
+        cairo_surface_t *surface;
+        int              width;
+        int              height;
+        GtkStyle        *style;
+        GdkColor         color;
+        double           r, g, b;
+
+	window = GSD_OSD_WINDOW (widget);
+
+        context = gdk_cairo_create (gtk_widget_get_window (widget));
+
+        style = gtk_widget_get_style (widget);
+        cairo_set_operator (context, CAIRO_OPERATOR_SOURCE);
+        gtk_window_get_size (GTK_WINDOW (widget), &width, &height);
+
+        surface = cairo_surface_create_similar (cairo_get_target (context),
+                                                CAIRO_CONTENT_COLOR_ALPHA,
+                                                width,
+                                                height);
+
+        if (cairo_surface_status (surface) != CAIRO_STATUS_SUCCESS) {
+                goto done;
+        }
+
+        cr = cairo_create (surface);
+        if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
+                goto done;
+        }
+        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0);
+        cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+        cairo_paint (cr);
+
+        /* draw a box */
+        gsd_osd_window_draw_rounded_rectangle (cr, 1.0, 0.5, 0.5, height / 10, width-1, height-1);
+        gsd_osd_window_color_reverse (&style->bg[GTK_STATE_NORMAL], &color);
+        r = (float)color.red / 65535.0;
+        g = (float)color.green / 65535.0;
+        b = (float)color.blue / 65535.0;
+        cairo_set_source_rgba (cr, r, g, b, BG_ALPHA);
+        cairo_fill_preserve (cr);
+
+        gsd_osd_window_color_reverse (&style->text_aa[GTK_STATE_NORMAL], &color);
+        r = (float)color.red / 65535.0;
+        g = (float)color.green / 65535.0;
+        b = (float)color.blue / 65535.0;
+        cairo_set_source_rgba (cr, r, g, b, BG_ALPHA / 2);
+        cairo_set_line_width (cr, 1);
+        cairo_stroke (cr);
+
+        g_signal_emit (window, signals[EXPOSE_WHEN_COMPOSITED], 0, cr);
+
+        cairo_destroy (cr);
+
+        /* Make sure we have a transparent background */
+        cairo_rectangle (context, 0, 0, width, height);
+        cairo_set_source_rgba (context, 0.0, 0.0, 0.0, 0.0);
+        cairo_fill (context);
+
+        cairo_set_source_surface (context, surface, 0, 0);
+        cairo_paint_with_alpha (context, window->priv->fade_out_alpha);
+
+ done:
+        if (surface != NULL) {
+                cairo_surface_destroy (surface);
+        }
+        cairo_destroy (context);
+}
+
+/* This is our expose-event handler when the window is *not* in a compositing manager.
+ * We just draw a rectangular frame by hand.  We do this with hardcoded drawing code,
+ * instead of GtkFrame, to avoid changing the window's internal widget hierarchy:  in
+ * either case (composited or non-composited), callers can assume that this works
+ * identically to a GtkWindow without any intermediate widgetry.
+ */
+static void
+expose_when_not_composited (GtkWidget *widget, GdkEventExpose *event)
+{
+	GsdOsdWindow *window;
+	GtkAllocation allocation;
+
+	window = GSD_OSD_WINDOW (widget);
+
+	gtk_widget_get_allocation (widget, &allocation);
+
+	gtk_paint_shadow (gtk_widget_get_style (widget),
+			  gtk_widget_get_window (widget),
+			  gtk_widget_get_state (widget),
+			  GTK_SHADOW_OUT,
+			  &event->area,
+			  widget,
+			  NULL, /* NULL detail -> themes should use the GsdOsdWindow widget name, probably */
+			  0,
+			  0,
+			  allocation.width,
+			  allocation.height);
+}
+
+static gboolean
+gsd_osd_window_expose_event (GtkWidget          *widget,
+			     GdkEventExpose     *event)
+{
+	GsdOsdWindow *window;
+	GtkWidget *child;
+
+	window = GSD_OSD_WINDOW (widget);
+
+	if (window->priv->is_composited)
+		expose_when_composited (widget, event);
+	else
+		expose_when_not_composited (widget, event);
+
+	child = gtk_bin_get_child (GTK_BIN (window));
+	if (child)
+		gtk_container_propagate_expose (GTK_CONTAINER (window), child, event);
+
+        return FALSE;
+}
+
+static void
+gsd_osd_window_real_show (GtkWidget *widget)
+{
+        GsdOsdWindow *window;
+
+        if (GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->show) {
+                GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->show (widget);
+        }
+
+        window = GSD_OSD_WINDOW (widget);
+        remove_hide_timeout (window);
+        add_hide_timeout (window);
+}
+
+static void
+gsd_osd_window_real_hide (GtkWidget *widget)
+{
+        GsdOsdWindow *window;
+
+        if (GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->hide) {
+                GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->hide (widget);
+        }
+
+        window = GSD_OSD_WINDOW (widget);
+        remove_hide_timeout (window);
+}
+
+static void
+gsd_osd_window_real_realize (GtkWidget *widget)
+{
+        GdkColormap *colormap;
+        GtkAllocation allocation;
+        GdkBitmap *mask;
+        cairo_t *cr;
+
+        colormap = gdk_screen_get_rgba_colormap (gtk_widget_get_screen (widget));
+
+        if (colormap != NULL) {
+                gtk_widget_set_colormap (widget, colormap);
+        }
+
+        if (GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->realize) {
+                GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->realize (widget);
+        }
+
+        gtk_widget_get_allocation (widget, &allocation);
+        mask = gdk_pixmap_new (gtk_widget_get_window (widget),
+                               allocation.width,
+                               allocation.height,
+                               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);
+
+        /* make the whole window ignore events */
+        gdk_window_input_shape_combine_mask (gtk_widget_get_window (widget), mask, 0, 0);
+        g_object_unref (mask);
+        cairo_destroy (cr);
+}
+
+static void
+gsd_osd_window_style_set (GtkWidget *widget,
+                          GtkStyle  *previous_style)
+{
+        GtkStyle *style;
+
+        GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->style_set (widget, previous_style);
+
+        /* We set our border width to 12 (per the MATE standard), plus the
+         * thickness of the frame that we draw in our expose handler.  This will
+         * make our child be 12 pixels away from the frame.
+         */
+
+        style = gtk_widget_get_style (widget);
+        gtk_container_set_border_width (GTK_CONTAINER (widget), 12 + MAX (style->xthickness, style->ythickness));
+}
+
+static void
+gsd_osd_window_size_request (GtkWidget      *widget,
+                             GtkRequisition *requisition)
+{
+        GtkStyle *style;
+
+        GTK_WIDGET_CLASS (gsd_osd_window_parent_class)->size_request (widget, requisition);
+
+        /* See the comment in gsd_osd_window_style_set() for why we add the thickness here */
+
+        style = gtk_widget_get_style (widget);
+
+        requisition->width  += style->xthickness;
+        requisition->height += style->ythickness;
+}
+
+static GObject *
+gsd_osd_window_constructor (GType                  type,
+                            guint                  n_construct_properties,
+                            GObjectConstructParam *construct_params)
+{
+        GObject *object;
+
+        object = G_OBJECT_CLASS (gsd_osd_window_parent_class)->constructor (type, n_construct_properties, construct_params);
+
+        g_object_set (object,
+                      "type", GTK_WINDOW_POPUP,
+                      "type-hint", GDK_WINDOW_TYPE_HINT_NOTIFICATION,
+                      "skip-taskbar-hint", TRUE,
+                      "skip-pager-hint", TRUE,
+                      "focus-on-map", FALSE,
+                      NULL);
+
+        return object;
+}
+
+static void
+gsd_osd_window_class_init (GsdOsdWindowClass *klass)
+{
+        GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+        gobject_class->constructor = gsd_osd_window_constructor;
+
+        widget_class->show = gsd_osd_window_real_show;
+        widget_class->hide = gsd_osd_window_real_hide;
+        widget_class->realize = gsd_osd_window_real_realize;
+        widget_class->style_set = gsd_osd_window_style_set;
+        widget_class->size_request = gsd_osd_window_size_request;
+	widget_class->expose_event = gsd_osd_window_expose_event;
+
+        signals[EXPOSE_WHEN_COMPOSITED] = g_signal_new ("expose-when-composited",
+                                                        G_TYPE_FROM_CLASS (gobject_class),
+                                                        G_SIGNAL_RUN_FIRST,
+                                                        G_STRUCT_OFFSET (GsdOsdWindowClass, expose_when_composited),
+                                                        NULL, NULL,
+                                                        g_cclosure_marshal_VOID__POINTER,
+                                                        G_TYPE_NONE, 1,
+                                                        G_TYPE_POINTER);
+
+        g_type_class_add_private (klass, sizeof (GsdOsdWindowPrivate));
+}
+
+/**
+ * gsd_osd_window_is_composited:
+ * @window: a #GsdOsdWindow
+ *
+ * Return value: whether the window was created on a composited screen.
+ */
+gboolean
+gsd_osd_window_is_composited (GsdOsdWindow *window)
+{
+        return window->priv->is_composited;
+}
+
+/**
+ * gsd_osd_window_is_valid:
+ * @window: a #GsdOsdWindow
+ *
+ * Return value: TRUE if the @window's idea of being composited matches whether
+ * its current screen is actually composited.
+ */
+gboolean
+gsd_osd_window_is_valid (GsdOsdWindow *window)
+{
+        GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (window));
+        return gdk_screen_is_composited (screen) == window->priv->is_composited;
+}
+
+static void
+gsd_osd_window_init (GsdOsdWindow *window)
+{
+        GdkScreen *screen;
+
+        window->priv = GSD_OSD_WINDOW_GET_PRIVATE (window);
+
+        screen = gtk_widget_get_screen (GTK_WIDGET (window));
+
+        window->priv->is_composited = gdk_screen_is_composited (screen);
+
+        if (window->priv->is_composited) {
+                gdouble scalew, scaleh, scale;
+                gint size;
+
+                gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
+                gtk_widget_set_app_paintable (GTK_WIDGET (window), TRUE);
+
+                /* assume 130x130 on a 640x480 display and scale from there */
+                scalew = gdk_screen_get_width (screen) / 640.0;
+                scaleh = gdk_screen_get_height (screen) / 480.0;
+                scale = MIN (scalew, scaleh);
+                size = 130 * MAX (1, scale);
+
+                gtk_window_set_default_size (GTK_WINDOW (window), size, size);
+
+                window->priv->fade_out_alpha = 1.0;
+        } else {
+		gtk_container_set_border_width (GTK_CONTAINER (window), 12);
+        }
+}
+
+GtkWidget *
+gsd_osd_window_new (void)
+{
+        return g_object_new (GSD_TYPE_OSD_WINDOW, NULL);
+}
+
+/**
+ * gsd_osd_window_update_and_hide:
+ * @window: a #GsdOsdWindow
+ *
+ * Queues the @window for immediate drawing, and queues a timer to hide the window.
+ */
+void
+gsd_osd_window_update_and_hide (GsdOsdWindow *window)
+{
+        remove_hide_timeout (window);
+        add_hide_timeout (window);
+
+        if (window->priv->is_composited) {
+                gtk_widget_queue_draw (GTK_WIDGET (window));
+        }
+}