382 lines
11 KiB
C
382 lines
11 KiB
C
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#include <unistd.h>
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#include <string.h>
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#include <metacity-private/util.h>
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#include <metacity-private/theme.h>
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#include <metacity-private/theme-parser.h>
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#include <metacity-private/preview-widget.h>
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/* We have to #undef this as metacity #defines these. */
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#undef _
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#undef N_
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#include <libgnomeui/gnome-icon-theme.h>
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#include <config.h>
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#include "theme-thumbnail.h"
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#include "capplet-util.h"
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/* Protocol */
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/* Our protocol is pretty simple. The parent process will write three strings
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* (separated by a '\000') They are the widget theme, the wm theme, and the icon
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* theme. Then, it will wait for the child to write back the data. It expects
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* 100x100x3 bytes of information. After that, the child is ready for the next
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* theme to render.
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*/
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enum
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{
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READY_FOR_THEME,
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READING_CONTROL_THEME_NAME,
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READING_WM_THEME_NAME,
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READING_ICON_THEME_NAME,
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WRITING_PIXBUF_DATA
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};
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typedef struct
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{
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gint status;
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GByteArray *control_theme_name;
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GByteArray *wm_theme_name;
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GByteArray *icon_theme_name;
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} ThemeThumbnailData;
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int pipe_to_factory_fd[2];
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int pipe_from_factory_fd[2];
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static void
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fake_expose_widget (GtkWidget *widget,
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GdkPixmap *pixmap)
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{
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GdkWindow *tmp_window;
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GdkEventExpose event;
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event.type = GDK_EXPOSE;
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event.window = pixmap;
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event.send_event = FALSE;
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event.area = widget->allocation;
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event.region = NULL;
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event.count = 0;
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tmp_window = widget->window;
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widget->window = pixmap;
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gtk_widget_send_expose (widget, (GdkEvent *) &event);
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widget->window = tmp_window;
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}
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static void
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hbox_foreach (GtkWidget *widget,
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gpointer data)
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{
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gtk_widget_realize (widget);
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gtk_widget_map (widget);
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gtk_widget_ensure_style (widget);
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fake_expose_widget (widget, (GdkPixmap *) data);
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}
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static void
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create_image (ThemeThumbnailData *theme_thumbnail_data,
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GdkPixbuf *pixbuf)
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{
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GtkWidget *window;
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GtkWidget *preview;
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GtkWidget *align;
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GtkWidget *stock_button;
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GtkRequisition requisition;
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GtkAllocation allocation;
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GdkPixmap *pixmap;
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GdkVisual *visual;
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MetaFrameFlags flags;
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MetaTheme *theme = NULL;
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GtkSettings *settings;
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GnomeIconTheme *icon_theme;
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GdkPixbuf *folder_icon;
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char *folder_icon_name;
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settings = gtk_settings_get_default ();
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g_object_set (G_OBJECT (settings),
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"gtk-theme-name", (char *) theme_thumbnail_data->control_theme_name->data,
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NULL);
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theme = meta_theme_load ((char *) theme_thumbnail_data->wm_theme_name->data, NULL);
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flags = META_FRAME_ALLOWS_DELETE |
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META_FRAME_ALLOWS_MENU |
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META_FRAME_ALLOWS_MINIMIZE |
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META_FRAME_ALLOWS_MAXIMIZE |
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META_FRAME_ALLOWS_VERTICAL_RESIZE |
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META_FRAME_ALLOWS_HORIZONTAL_RESIZE |
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META_FRAME_HAS_FOCUS |
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META_FRAME_ALLOWS_SHADE |
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META_FRAME_ALLOWS_MOVE;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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preview = meta_preview_new ();
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gtk_container_add (GTK_CONTAINER (window), preview);
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gtk_widget_realize (window);
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gtk_widget_realize (preview);
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align = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
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gtk_container_add (GTK_CONTAINER (preview), align);
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gtk_container_set_border_width (GTK_CONTAINER (align), 5);
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stock_button = gtk_button_new_from_stock (GTK_STOCK_OPEN);
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gtk_container_add (GTK_CONTAINER (align), stock_button);
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gtk_widget_show_all (preview);
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gtk_widget_realize (align);
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gtk_widget_realize (stock_button);
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gtk_widget_realize (GTK_BIN (stock_button)->child);
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gtk_widget_map (stock_button);
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gtk_widget_map (GTK_BIN (stock_button)->child);
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meta_preview_set_frame_flags (META_PREVIEW (preview), flags);
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meta_preview_set_theme (META_PREVIEW (preview), theme);
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meta_preview_set_title (META_PREVIEW (preview), "");
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gtk_window_set_default_size (GTK_WINDOW (window), 100, 100);
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gtk_widget_size_request (window, &requisition);
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allocation.x = 0;
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allocation.y = 0;
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allocation.width = 100;
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allocation.height = 100;
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gtk_widget_size_allocate (window, &allocation);
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gtk_widget_size_request (window, &requisition);
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/* Create a pixmap */
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visual = gtk_widget_get_visual (window);
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pixmap = gdk_pixmap_new (NULL, 100, 100, gdk_visual_get_best_depth());
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gdk_drawable_set_colormap (GDK_DRAWABLE (pixmap), gtk_widget_get_colormap (window));
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/* Draw the window */
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gtk_widget_ensure_style (window);
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g_assert (window->style);
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g_assert (window->style->font_desc);
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fake_expose_widget (window, pixmap);
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fake_expose_widget (preview, pixmap);
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fake_expose_widget (stock_button, pixmap);
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gtk_container_foreach (GTK_CONTAINER (GTK_BIN (GTK_BIN (stock_button)->child)->child),
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hbox_foreach,
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pixmap);
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fake_expose_widget (GTK_BIN (stock_button)->child, pixmap);
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gdk_pixbuf_get_from_drawable (pixbuf, pixmap, NULL, 0, 0, 0, 0, 100, 100);
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/* Handle the icon theme */
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icon_theme = gnome_icon_theme_new ();
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gnome_icon_theme_set_custom_theme (icon_theme, (char *) theme_thumbnail_data->icon_theme_name->data);
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folder_icon_name = gnome_icon_theme_lookup_icon (icon_theme, "folder", 48, NULL, NULL);
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if (folder_icon_name != NULL)
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{
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folder_icon = gdk_pixbuf_new_from_file (folder_icon_name, NULL);
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g_free (folder_icon_name);
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}
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else
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{
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folder_icon = NULL;
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}
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/* render the icon to the thumbnail */
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if (folder_icon)
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{
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gdk_pixbuf_composite (folder_icon,
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pixbuf,
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align->allocation.x + align->allocation.width - gdk_pixbuf_get_width (folder_icon) - 5,
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align->allocation.y + align->allocation.height - gdk_pixbuf_get_height (folder_icon) - 5,
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gdk_pixbuf_get_width (folder_icon),
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gdk_pixbuf_get_height (folder_icon),
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align->allocation.x + align->allocation.width - gdk_pixbuf_get_width (folder_icon) - 5,
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align->allocation.y + align->allocation.height - gdk_pixbuf_get_height (folder_icon) - 5,
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1.0, 1.0, GDK_INTERP_BILINEAR, 255);
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g_object_unref (folder_icon);
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}
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}
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static void
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handle_bytes (const gchar *buffer,
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gint bytes_read,
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ThemeThumbnailData *theme_thumbnail_data)
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{
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const gchar *ptr;
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ptr = buffer;
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while (bytes_read > 0)
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{
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char *nil;
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switch (theme_thumbnail_data->status)
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{
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case READY_FOR_THEME:
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case READING_CONTROL_THEME_NAME:
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theme_thumbnail_data->status = READING_CONTROL_THEME_NAME;
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nil = memchr (ptr, '\000', bytes_read);
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if (nil == NULL)
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{
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g_byte_array_append (theme_thumbnail_data->control_theme_name, ptr, bytes_read);
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bytes_read = 0;
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}
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else
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{
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g_byte_array_append (theme_thumbnail_data->control_theme_name, ptr, nil - ptr + 1);
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bytes_read -= (nil - ptr + 1);
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ptr = nil + 1;
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theme_thumbnail_data->status = READING_WM_THEME_NAME;
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}
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break;
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case READING_WM_THEME_NAME:
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nil = memchr (ptr, '\000', bytes_read);
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if (nil == NULL)
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{
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g_byte_array_append (theme_thumbnail_data->wm_theme_name, ptr, bytes_read);
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bytes_read = 0;
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}
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else
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{
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g_byte_array_append (theme_thumbnail_data->wm_theme_name, ptr, nil - ptr + 1);
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bytes_read -= (nil - ptr + 1);
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ptr = nil + 1;
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theme_thumbnail_data->status = READING_ICON_THEME_NAME;
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}
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break;
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case READING_ICON_THEME_NAME:
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nil = memchr (ptr, '\000', bytes_read);
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if (nil == NULL)
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{
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g_byte_array_append (theme_thumbnail_data->icon_theme_name, ptr, bytes_read);
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bytes_read = 0;
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}
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else
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{
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g_byte_array_append (theme_thumbnail_data->icon_theme_name, ptr, nil - ptr + 1);
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bytes_read -= (nil - ptr + 1);
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ptr = nil + 1;
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theme_thumbnail_data->status = WRITING_PIXBUF_DATA;
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}
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break;
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default:
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g_assert_not_reached ();
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}
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}
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}
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static gboolean
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message_from_capplet (GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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gchar buffer[1024];
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GIOStatus status;
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gint bytes_read;
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GdkPixbuf *pixbuf;
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gint i, rowstride;
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char *pixels;
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ThemeThumbnailData *theme_thumbnail_data;
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theme_thumbnail_data = (ThemeThumbnailData *)data;
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status = g_io_channel_read_chars (source,
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buffer,
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1024,
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&bytes_read,
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NULL);
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switch (status)
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{
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case G_IO_STATUS_NORMAL:
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handle_bytes (buffer, bytes_read, theme_thumbnail_data);
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if (theme_thumbnail_data->status == WRITING_PIXBUF_DATA)
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{
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 100, 100);
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create_image (theme_thumbnail_data, pixbuf);
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rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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pixels = gdk_pixbuf_get_pixels (pixbuf);
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for (i = 0; i < 100; i ++)
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{
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write (pipe_from_factory_fd[1], pixels + (rowstride)*i, 100*4);
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}
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theme_thumbnail_data->status = READY_FOR_THEME;
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g_byte_array_set_size (theme_thumbnail_data->control_theme_name, 0);
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g_byte_array_set_size (theme_thumbnail_data->wm_theme_name, 0);
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g_byte_array_set_size (theme_thumbnail_data->icon_theme_name, 0);
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}
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return TRUE;
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case G_IO_STATUS_AGAIN:
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return TRUE;
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case G_IO_STATUS_EOF:
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case G_IO_STATUS_ERROR:
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break;
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default:
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g_assert_not_reached ();
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}
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return TRUE;
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}
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GdkPixbuf *
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generate_theme_thumbnail (GnomeThemeMetaInfo *meta_theme_info)
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{
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GdkPixbuf *retval = NULL;
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gint i, rowstride;
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char *pixels;
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retval = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 100, 100);
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write (pipe_to_factory_fd[1], meta_theme_info->gtk_theme_name, strlen (meta_theme_info->gtk_theme_name) + 1);
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write (pipe_to_factory_fd[1], meta_theme_info->metacity_theme_name, strlen (meta_theme_info->metacity_theme_name) + 1);
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write (pipe_to_factory_fd[1], meta_theme_info->icon_theme_name, strlen (meta_theme_info->icon_theme_name) + 1);
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rowstride = gdk_pixbuf_get_rowstride (retval);
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pixels = gdk_pixbuf_get_pixels (retval);
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for (i = 0; i < 100; i++)
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{
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read (pipe_from_factory_fd[0], pixels + (rowstride)*i, 100*4);
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}
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return retval;
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}
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void
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setup_theme_thumbnail_factory (int argc, char *argv[])
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{
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gint pid;
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pipe (pipe_to_factory_fd);
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pipe (pipe_from_factory_fd);
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pid = fork ();
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if (pid == 0)
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{
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GIOChannel *channel;
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ThemeThumbnailData data;
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/* Child */
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gtk_init (&argc, &argv);
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close (pipe_to_factory_fd[1]);
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close (pipe_from_factory_fd[0]);
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data.status = READY_FOR_THEME;
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data.control_theme_name = g_byte_array_new ();
|
||
|
|
data.wm_theme_name = g_byte_array_new ();
|
||
|
|
data.icon_theme_name = g_byte_array_new ();
|
||
|
|
|
||
|
|
channel = g_io_channel_unix_new (pipe_to_factory_fd[0]);
|
||
|
|
g_io_channel_set_flags (channel, g_io_channel_get_flags (channel) | G_IO_FLAG_NONBLOCK, NULL);
|
||
|
|
g_io_channel_set_encoding (channel, NULL, NULL);
|
||
|
|
g_io_add_watch (channel, G_IO_IN, message_from_capplet, &data);
|
||
|
|
g_io_channel_unref (channel);
|
||
|
|
|
||
|
|
gtk_main ();
|
||
|
|
_exit (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Parent */
|
||
|
|
close (pipe_to_factory_fd[0]);
|
||
|
|
close (pipe_from_factory_fd[1]);
|
||
|
|
}
|