1 files changed, 601 insertions, 0 deletions
diff --git a/src/ui/preview-widget.c b/src/ui/preview-widget.c
new file mode 100644
index 00000000..8fcd2517
--- /dev/null
+++ b/src/ui/preview-widget.c
@@ -0,0 +1,601 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/* Marco theme preview widget */
+
+/* 
+ * Copyright (C) 2002 Havoc Pennington
+ * 
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#define _XOPEN_SOURCE 600 /* for the maths routines over floats */
+
+#include <math.h>
+#include <gtk/gtk.h>
+#include "preview-widget.h"
+
+static void meta_preview_class_init (MetaPreviewClass *klass);
+static void meta_preview_init (MetaPreview *preview);
+static void meta_preview_size_request (GtkWidget *widget,
+ GtkRequisition *req);
+static void meta_preview_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation);
+static gboolean meta_preview_expose (GtkWidget *widget,
+ GdkEventExpose *event);
+static void meta_preview_finalize (GObject *object);
+
+static GtkWidgetClass *parent_class;
+
+GType
+meta_preview_get_type (void)
+{
+ static GType preview_type = 0;
+
+ if (!preview_type)
+ {
+ static const GtkTypeInfo preview_info =
+ {
+ "MetaPreview",
+ sizeof (MetaPreview),
+ sizeof (MetaPreviewClass),
+ (GtkClassInitFunc) meta_preview_class_init,
+ (GtkObjectInitFunc) meta_preview_init,
+ /* reserved_1 */ NULL,
+ /* reserved_2 */ NULL,
+ (GtkClassInitFunc) NULL,
+ };
+
+ preview_type = gtk_type_unique (GTK_TYPE_BIN, &preview_info);
+ }
+
+ return preview_type;
+}
+
+static void
+meta_preview_class_init (MetaPreviewClass *class)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+ GtkWidgetClass *widget_class;
+
+ widget_class = (GtkWidgetClass*) class;
+ parent_class = g_type_class_peek (GTK_TYPE_BIN);
+
+ gobject_class->finalize = meta_preview_finalize;
+
+ widget_class->expose_event = meta_preview_expose;
+ widget_class->size_request = meta_preview_size_request;
+ widget_class->size_allocate = meta_preview_size_allocate;
+}
+
+static void
+meta_preview_init (MetaPreview *preview)
+{
+ int i;
+ 
+ gtk_widget_set_has_window (GTK_WIDGET (preview), FALSE);
+
+ i = 0;
+ while (i < MAX_BUTTONS_PER_CORNER)
+ {
+ preview->button_layout.left_buttons[i] = META_BUTTON_FUNCTION_LAST;
+ preview->button_layout.right_buttons[i] = META_BUTTON_FUNCTION_LAST;
+ ++i;
+ }
+ 
+ preview->button_layout.left_buttons[0] = META_BUTTON_FUNCTION_MENU;
+
+ preview->button_layout.right_buttons[0] = META_BUTTON_FUNCTION_MINIMIZE;
+ preview->button_layout.right_buttons[1] = META_BUTTON_FUNCTION_MAXIMIZE;
+ preview->button_layout.right_buttons[2] = META_BUTTON_FUNCTION_CLOSE;
+ 
+ preview->type = META_FRAME_TYPE_NORMAL;
+ preview->flags =
+ META_FRAME_ALLOWS_DELETE |
+ META_FRAME_ALLOWS_MENU |
+ META_FRAME_ALLOWS_MINIMIZE |
+ META_FRAME_ALLOWS_MAXIMIZE |
+ META_FRAME_ALLOWS_VERTICAL_RESIZE |
+ META_FRAME_ALLOWS_HORIZONTAL_RESIZE |
+ META_FRAME_HAS_FOCUS |
+ META_FRAME_ALLOWS_SHADE |
+ META_FRAME_ALLOWS_MOVE;
+ 
+ preview->left_width = -1;
+ preview->right_width = -1;
+ preview->top_height = -1;
+ preview->bottom_height = -1;
+}
+
+GtkWidget*
+meta_preview_new (void)
+{
+ MetaPreview *preview;
+ 
+ preview = gtk_type_new (META_TYPE_PREVIEW);
+ 
+ return GTK_WIDGET (preview);
+}
+
+static void
+meta_preview_finalize (GObject *object)
+{
+ MetaPreview *preview;
+
+ preview = META_PREVIEW (object);
+
+ g_free (preview->title);
+ preview->title = NULL;
+ 
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+ensure_info (MetaPreview *preview)
+{
+ GtkWidget *widget;
+
+ widget = GTK_WIDGET (preview);
+ 
+ if (preview->layout == NULL)
+ {
+ PangoFontDescription *font_desc;
+ double scale;
+ PangoAttrList *attrs;
+ PangoAttribute *attr;
+
+ if (preview->theme) 
+ scale = meta_theme_get_title_scale (preview->theme,
+ preview->type,
+ preview->flags);
+ else
+ scale = 1.0;
+ 
+ preview->layout = gtk_widget_create_pango_layout (widget,
+ preview->title);
+ 
+ font_desc = meta_gtk_widget_get_font_desc (widget, scale, NULL);
+ 
+ preview->text_height =
+ meta_pango_font_desc_get_text_height (font_desc,
+ gtk_widget_get_pango_context (widget));
+ 
+ attrs = pango_attr_list_new ();
+ 
+ attr = pango_attr_size_new (pango_font_description_get_size (font_desc));
+ attr->start_index = 0;
+ attr->end_index = G_MAXINT;
+ 
+ pango_attr_list_insert (attrs, attr);
+ 
+ pango_layout_set_attributes (preview->layout, attrs);
+ 
+ pango_attr_list_unref (attrs); 
+ 
+ pango_font_description_free (font_desc);
+ }
+
+ if (preview->top_height < 0)
+ {
+ if (preview->theme)
+ {
+ meta_theme_get_frame_borders (preview->theme,
+ preview->type,
+ preview->text_height,
+ preview->flags,
+ &preview->top_height,
+ &preview->bottom_height,
+ &preview->left_width,
+ &preview->right_width);
+ }
+ else
+ {
+ preview->top_height = 0;
+ preview->bottom_height = 0;
+ preview->left_width = 0;
+ preview->right_width = 0;
+ }
+ }
+}
+
+static gboolean
+meta_preview_expose (GtkWidget *widget,
+ GdkEventExpose *event)
+{
+ MetaPreview *preview;
+ GtkAllocation allocation;
+ int border_width;
+ int client_width;
+ int client_height;
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST] =
+ {
+ META_BUTTON_STATE_NORMAL,
+ META_BUTTON_STATE_NORMAL,
+ META_BUTTON_STATE_NORMAL,
+ META_BUTTON_STATE_NORMAL
+ };
+ 
+ g_return_val_if_fail (META_IS_PREVIEW (widget), FALSE);
+ g_return_val_if_fail (event != NULL, FALSE);
+
+ preview = META_PREVIEW (widget);
+
+ ensure_info (preview);
+
+ border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+ 
+ gtk_widget_get_allocation (widget, &allocation);
+ client_width = allocation.width - preview->left_width - preview->right_width - border_width * 2;
+ client_height = allocation.height - preview->top_height - preview->bottom_height - border_width * 2;
+
+ if (client_width < 0)
+ client_width = 1;
+ if (client_height < 0)
+ client_height = 1; 
+ 
+ if (preview->theme)
+ {
+ border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+ 
+ meta_theme_draw_frame (preview->theme,
+ widget,
+ gtk_widget_get_window (widget),
+ &event->area,
+ allocation.x + border_width,
+ allocation.y + border_width,
+ preview->type,
+ preview->flags,
+ client_width, client_height,
+ preview->layout,
+ preview->text_height,
+ &preview->button_layout,
+ button_states,
+ meta_preview_get_mini_icon (),
+ meta_preview_get_icon ());
+ }
+
+ /* draw child */
+ return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
+}
+
+static void
+meta_preview_size_request (GtkWidget *widget,
+ GtkRequisition *req)
+{
+ MetaPreview *preview;
+ GtkWidget *child;
+ guint border_width;
+
+ preview = META_PREVIEW (widget);
+
+ ensure_info (preview);
+
+ req->width = preview->left_width + preview->right_width;
+ req->height = preview->top_height + preview->bottom_height;
+ 
+ child = gtk_bin_get_child (GTK_BIN (preview));
+ if (child &&
+ gtk_widget_get_visible (child))
+ {
+ GtkRequisition child_requisition;
+
+ gtk_widget_size_request (child, &child_requisition);
+
+ req->width += child_requisition.width;
+ req->height += child_requisition.height;
+ }
+ else
+ {
+#define NO_CHILD_WIDTH 80
+#define NO_CHILD_HEIGHT 20
+ req->width += NO_CHILD_WIDTH;
+ req->height += NO_CHILD_HEIGHT;
+ }
+
+ border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+ req->width += border_width * 2;
+ req->height += border_width * 2;
+}
+
+static void
+meta_preview_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ MetaPreview *preview;
+ int border_width;
+ GtkAllocation child_allocation;
+ GtkWidget *child;
+ 
+ preview = META_PREVIEW (widget);
+
+ ensure_info (preview);
+ 
+ widget->allocation = *allocation;
+
+ border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+ 
+ child = gtk_bin_get_child (GTK_BIN (widget));
+ if (child &&
+ gtk_widget_get_visible (child))
+ {
+ child_allocation.x = widget->allocation.x + border_width + preview->left_width;
+ child_allocation.y = widget->allocation.y + border_width + preview->top_height;
+ 
+ child_allocation.width = MAX (1, widget->allocation.width - border_width * 2 - preview->left_width - preview->right_width);
+ child_allocation.height = MAX (1, widget->allocation.height - border_width * 2 - preview->top_height - preview->bottom_height);
+
+ gtk_widget_size_allocate (gtk_bin_get_child (GTK_BIN (widget)), &child_allocation);
+ }
+}
+
+static void
+clear_cache (MetaPreview *preview)
+{
+ if (preview->layout)
+ {
+ g_object_unref (G_OBJECT (preview->layout));
+ preview->layout = NULL;
+ }
+
+ preview->left_width = -1;
+ preview->right_width = -1;
+ preview->top_height = -1;
+ preview->bottom_height = -1;
+}
+
+void
+meta_preview_set_theme (MetaPreview *preview,
+ MetaTheme *theme)
+{
+ g_return_if_fail (META_IS_PREVIEW (preview));
+
+ preview->theme = theme;
+ 
+ clear_cache (preview);
+
+ gtk_widget_queue_resize (GTK_WIDGET (preview));
+}
+
+void
+meta_preview_set_title (MetaPreview *preview,
+ const char *title)
+{
+ g_return_if_fail (META_IS_PREVIEW (preview));
+
+ g_free (preview->title);
+ preview->title = g_strdup (title);
+ 
+ clear_cache (preview);
+
+ gtk_widget_queue_resize (GTK_WIDGET (preview));
+}
+
+void
+meta_preview_set_frame_type (MetaPreview *preview,
+ MetaFrameType type)
+{
+ g_return_if_fail (META_IS_PREVIEW (preview));
+
+ preview->type = type;
+
+ clear_cache (preview);
+
+ gtk_widget_queue_resize (GTK_WIDGET (preview));
+}
+
+void
+meta_preview_set_frame_flags (MetaPreview *preview,
+ MetaFrameFlags flags)
+{
+ g_return_if_fail (META_IS_PREVIEW (preview));
+
+ preview->flags = flags;
+
+ clear_cache (preview);
+
+ gtk_widget_queue_resize (GTK_WIDGET (preview));
+}
+
+void
+meta_preview_set_button_layout (MetaPreview *preview,
+ const MetaButtonLayout *button_layout)
+{
+ g_return_if_fail (META_IS_PREVIEW (preview));
+ 
+ preview->button_layout = *button_layout; 
+ 
+ gtk_widget_queue_draw (GTK_WIDGET (preview));
+}
+
+GdkPixbuf*
+meta_preview_get_icon (void)
+{
+ static GdkPixbuf *default_icon = NULL;
+
+ if (default_icon == NULL)
+ {
+ GtkIconTheme *theme;
+ gboolean icon_exists;
+
+ theme = gtk_icon_theme_get_default ();
+
+ icon_exists = gtk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME);
+
+ if (icon_exists)
+ default_icon = gtk_icon_theme_load_icon (theme,
+ META_DEFAULT_ICON_NAME,
+ META_ICON_WIDTH,
+ 0,
+ NULL);
+ else
+ default_icon = gtk_icon_theme_load_icon (theme,
+ "gtk-missing-image",
+ META_ICON_WIDTH,
+ 0,
+ NULL);
+
+ g_assert (default_icon);
+ }
+ 
+ return default_icon;
+}
+
+GdkPixbuf*
+meta_preview_get_mini_icon (void)
+{
+ static GdkPixbuf *default_icon = NULL;
+
+ if (default_icon == NULL)
+ {
+ GtkIconTheme *theme;
+ gboolean icon_exists;
+
+ theme = gtk_icon_theme_get_default ();
+
+ icon_exists = gtk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME);
+
+ if (icon_exists)
+ default_icon = gtk_icon_theme_load_icon (theme,
+ META_DEFAULT_ICON_NAME,
+ META_MINI_ICON_WIDTH,
+ 0,
+ NULL);
+ else
+ default_icon = gtk_icon_theme_load_icon (theme,
+ "gtk-missing-image",
+ META_MINI_ICON_WIDTH,
+ 0,
+ NULL);
+
+ g_assert (default_icon);
+ }
+ 
+ return default_icon;
+}
+
+GdkRegion *
+meta_preview_get_clip_region (MetaPreview *preview, gint new_window_width, gint new_window_height)
+{
+ GdkRectangle xrect;
+ GdkRegion *corners_xregion, *window_xregion;
+ gint flags;
+ MetaFrameLayout *fgeom;
+ MetaFrameStyle *frame_style;
+
+ g_return_val_if_fail (META_IS_PREVIEW (preview), NULL);
+
+ flags = (META_PREVIEW (preview)->flags);
+
+ window_xregion = gdk_region_new ();
+
+ xrect.x = 0;
+ xrect.y = 0;
+ xrect.width = new_window_width;
+ xrect.height = new_window_height;
+
+ gdk_region_union_with_rect (window_xregion, &xrect);
+
+ if (preview->theme == NULL)
+ return window_xregion;
+
+ /* Otherwise, we do have a theme, so calculate the corners */
+ frame_style = meta_theme_get_frame_style (preview->theme,
+ META_FRAME_TYPE_NORMAL, flags);
+
+ fgeom = frame_style->layout;
+
+ corners_xregion = gdk_region_new ();
+
+ if (fgeom->top_left_corner_rounded_radius != 0)
+ {
+ const int corner = fgeom->top_left_corner_rounded_radius;
+ const float radius = sqrt(corner) + corner;
+ int i;
+
+ for (i=0; i<corner; i++)
+ {
+
+ const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
+ xrect.x = 0;
+ xrect.y = i;
+ xrect.width = width;
+ xrect.height = 1;
+
+ gdk_region_union_with_rect (corners_xregion, &xrect);
+ }
+ }
+
+ if (fgeom->top_right_corner_rounded_radius != 0)
+ {
+ const int corner = fgeom->top_right_corner_rounded_radius;
+ const float radius = sqrt(corner) + corner;
+ int i;
+
+ for (i=0; i<corner; i++)
+ {
+ const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
+ xrect.x = new_window_width - width;
+ xrect.y = i;
+ xrect.width = width;
+ xrect.height = 1;
+
+ gdk_region_union_with_rect (corners_xregion, &xrect);
+ }
+ }
+
+ if (fgeom->bottom_left_corner_rounded_radius != 0)
+ {
+ const int corner = fgeom->bottom_left_corner_rounded_radius;
+ const float radius = sqrt(corner) + corner;
+ int i;
+
+ for (i=0; i<corner; i++)
+ {
+ const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
+ xrect.x = 0;
+ xrect.y = new_window_height - i - 1;
+ xrect.width = width;
+ xrect.height = 1;
+
+ gdk_region_union_with_rect (corners_xregion, &xrect);
+ }
+ }
+
+ if (fgeom->bottom_right_corner_rounded_radius != 0)
+ {
+ const int corner = fgeom->bottom_right_corner_rounded_radius;
+ const float radius = sqrt(corner) + corner;
+ int i;
+
+ for (i=0; i<corner; i++)
+ {
+ const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
+ xrect.x = new_window_width - width;
+ xrect.y = new_window_height - i - 1;
+ xrect.width = width;
+ xrect.height = 1;
+
+ gdk_region_union_with_rect (corners_xregion, &xrect);
+ }
+ }
+
+ gdk_region_subtract (window_xregion, corners_xregion);
+ gdk_region_destroy (corners_xregion);
+
+ return window_xregion;
+}
+
+