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mutter/src/tabpopup.c
Elijah Newren 0201fcfc6c Stick an emacs comment directive at the beginning of all the code files so 
2006-10-01  Elijah Newren  <newren gmail com>

	* src/*.[ch]: Stick an emacs comment directive at the beginning of
	all the code files so that people using emacs will be more likely
	to get coding style correct in their patches.  We still need a
	similar vi directive.  #358866
2006-10-01 22:30:10 +00:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Metacity popup window thing showing windows you can tab to */
/*
* Copyright (C) 2001 Havoc Pennington
* Copyright (C) 2002 Red Hat, Inc.
* Copyright (C) 2005 Elijah Newren
*
* 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 <config.h>
#include "util.h"
#include "core.h"
#include "tabpopup.h"
#include "workspace.h" /* FIXME should not be included in this file */
#include "draw-workspace.h"
#include "frame.h"
#include <gtk/gtk.h>
#include <math.h>
#define OUTSIDE_SELECT_RECT 2
#define INSIDE_SELECT_RECT 2
typedef struct _TabEntry TabEntry;
struct _TabEntry
{
MetaTabEntryKey key;
char *title;
GdkPixbuf *icon, *dimmed_icon;
GtkWidget *widget;
GdkRectangle rect;
GdkRectangle inner_rect;
guint blank : 1;
};
struct _MetaTabPopup
{
GtkWidget *window;
GtkWidget *label;
GList *current;
GList *entries;
TabEntry *current_selected_entry;
GtkWidget *outline_window;
gboolean outline;
};
static GtkWidget* selectable_image_new (GdkPixbuf *pixbuf);
static void select_image (GtkWidget *widget);
static void unselect_image (GtkWidget *widget);
static GtkWidget* selectable_workspace_new (MetaWorkspace *workspace);
static void select_workspace (GtkWidget *widget);
static void unselect_workspace (GtkWidget *widget);
static gboolean
outline_window_expose (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
MetaTabPopup *popup;
TabEntry *te;
popup = data;
if (!popup->outline || popup->current_selected_entry == NULL)
return FALSE;
te = popup->current_selected_entry;
gdk_draw_rectangle (widget->window,
widget->style->white_gc,
FALSE,
0, 0,
te->rect.width - 1,
te->rect.height - 1);
gdk_draw_rectangle (widget->window,
widget->style->white_gc,
FALSE,
te->inner_rect.x - 1, te->inner_rect.y - 1,
te->inner_rect.width + 1,
te->inner_rect.height + 1);
return FALSE;
}
static GdkPixbuf*
dimm_icon (GdkPixbuf *pixbuf)
{
int x, y, pixel_stride, row_stride;
guchar *row, *pixels;
int w, h;
GdkPixbuf *dimmed_pixbuf;
if (gdk_pixbuf_get_has_alpha (pixbuf))
{
dimmed_pixbuf = gdk_pixbuf_copy (pixbuf);
}
else
{
dimmed_pixbuf = gdk_pixbuf_add_alpha (pixbuf, FALSE, 0, 0, 0);
}
w = gdk_pixbuf_get_width (dimmed_pixbuf);
h = gdk_pixbuf_get_height (dimmed_pixbuf);
pixel_stride = 4;
row = gdk_pixbuf_get_pixels (dimmed_pixbuf);
row_stride = gdk_pixbuf_get_rowstride (dimmed_pixbuf);
for (y = 0; y < h; y++)
{
pixels = row;
for (x = 0; x < w; x++)
{
pixels[3] /= 2;
pixels += pixel_stride;
}
row += row_stride;
}
return dimmed_pixbuf;
}
static TabEntry*
tab_entry_new (const MetaTabEntry *entry,
gint screen_width,
gboolean outline)
{
TabEntry *te;
/* FIXME: make max title size some random relationship to the
* screen, avg char width of our font would be a better number.
*/
int max_chars_per_title = screen_width / 15;
te = g_new (TabEntry, 1);
te->key = entry->key;
te->title = NULL;
if (entry->title)
{
gchar *tmp;
if (entry->hidden)
{
tmp = g_markup_printf_escaped ("[%s]", entry->title);
}
else
{
tmp = g_markup_printf_escaped ("%s", entry->title);
}
if (entry->demands_attention)
{
/* Escape the whole line of text then markup the text and
* copy it back into the original buffer.
*/
gchar *markup, *escaped;
escaped = g_markup_escape_text (tmp, -1);
markup = g_strdup_printf ("<b>%s</b>", escaped);
g_free (escaped);
g_free (tmp);
tmp = markup;
}
te->title = meta_g_utf8_strndup (tmp, max_chars_per_title);
g_free (tmp);
}
te->widget = NULL;
te->icon = entry->icon;
te->blank = entry->blank;
te->dimmed_icon = NULL;
if (te->icon)
{
g_object_ref (G_OBJECT (te->icon));
if (entry->hidden)
te->dimmed_icon = dimm_icon (entry->icon);
}
if (outline)
{
te->rect.x = entry->rect.x;
te->rect.y = entry->rect.y;
te->rect.width = entry->rect.width;
te->rect.height = entry->rect.height;
te->inner_rect.x = entry->inner_rect.x;
te->inner_rect.y = entry->inner_rect.y;
te->inner_rect.width = entry->inner_rect.width;
te->inner_rect.height = entry->inner_rect.height;
}
return te;
}
MetaTabPopup*
meta_ui_tab_popup_new (const MetaTabEntry *entries,
int screen_number,
int entry_count,
int width,
gboolean outline)
{
MetaTabPopup *popup;
int i, left, right, top, bottom;
int height;
GtkWidget *table;
GtkWidget *vbox;
GtkWidget *align;
GList *tmp;
GtkWidget *frame;
int max_label_width; /* the actual max width of the labels we create */
AtkObject *obj;
GdkScreen *screen;
int screen_width;
popup = g_new (MetaTabPopup, 1);
popup->outline_window = gtk_window_new (GTK_WINDOW_POPUP);
screen = gdk_display_get_screen (gdk_display_get_default (),
screen_number);
gtk_window_set_screen (GTK_WINDOW (popup->outline_window),
screen);
gtk_widget_set_app_paintable (popup->outline_window, TRUE);
gtk_widget_realize (popup->outline_window);
g_signal_connect (G_OBJECT (popup->outline_window), "expose_event",
G_CALLBACK (outline_window_expose), popup);
popup->window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_screen (GTK_WINDOW (popup->window),
screen);
gtk_window_set_position (GTK_WINDOW (popup->window),
GTK_WIN_POS_CENTER_ALWAYS);
/* enable resizing, to get never-shrink behavior */
gtk_window_set_resizable (GTK_WINDOW (popup->window),
TRUE);
popup->current = NULL;
popup->entries = NULL;
popup->current_selected_entry = NULL;
popup->outline = outline;
screen_width = gdk_screen_get_width (screen);
for (i = 0; i < entry_count; ++i)
{
TabEntry* new_entry = tab_entry_new (&entries[i], screen_width, outline);
popup->entries = g_list_prepend (popup->entries, new_entry);
}
popup->entries = g_list_reverse (popup->entries);
g_assert (width > 0);
height = i / width;
if (i % width)
height += 1;
table = gtk_table_new (height, width, FALSE);
vbox = gtk_vbox_new (FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_set_border_width (GTK_CONTAINER (table), 1);
gtk_container_add (GTK_CONTAINER (popup->window),
frame);
gtk_container_add (GTK_CONTAINER (frame),
vbox);
align = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (vbox), align, TRUE, TRUE, 0);
gtk_container_add (GTK_CONTAINER (align),
table);
popup->label = gtk_label_new ("");
/* Set the accessible role of the label to a status bar so it
* will emit name changed events that can be used by screen
* readers.
*/
obj = gtk_widget_get_accessible (popup->label);
atk_object_set_role (obj, ATK_ROLE_STATUSBAR);
gtk_misc_set_padding (GTK_MISC (popup->label), 3, 3);
gtk_box_pack_end (GTK_BOX (vbox), popup->label, FALSE, FALSE, 0);
max_label_width = 0;
top = 0;
bottom = 1;
tmp = popup->entries;
while (tmp && top < height)
{
left = 0;
right = 1;
while (tmp && left < width)
{
GtkWidget *image;
GtkRequisition req;
TabEntry *te;
te = tmp->data;
if (te->blank)
{
/* just stick a widget here to avoid special cases */
image = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
}
else if (outline)
{
if (te->dimmed_icon)
{
image = selectable_image_new (te->dimmed_icon);
}
else
{
image = selectable_image_new (te->icon);
}
gtk_misc_set_padding (GTK_MISC (image),
INSIDE_SELECT_RECT + OUTSIDE_SELECT_RECT + 1,
INSIDE_SELECT_RECT + OUTSIDE_SELECT_RECT + 1);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.5);
}
else
{
image = selectable_workspace_new ((MetaWorkspace *) te->key);
}
te->widget = image;
gtk_table_attach (GTK_TABLE (table),
te->widget,
left, right, top, bottom,
0, 0,
0, 0);
/* Efficiency rules! */
gtk_label_set_markup (GTK_LABEL (popup->label),
te->title);
gtk_widget_size_request (popup->label, &req);
max_label_width = MAX (max_label_width, req.width);
tmp = tmp->next;
++left;
++right;
}
++top;
++bottom;
}
/* remove all the temporary text */
gtk_label_set_text (GTK_LABEL (popup->label), "");
max_label_width += 20; /* add random padding */
gtk_window_set_default_size (GTK_WINDOW (popup->window),
max_label_width,
-1);
return popup;
}
static void
free_tab_entry (gpointer data, gpointer user_data)
{
TabEntry *te;
te = data;
g_free (te->title);
if (te->icon)
g_object_unref (G_OBJECT (te->icon));
if (te->dimmed_icon)
g_object_unref (G_OBJECT (te->dimmed_icon));
g_free (te);
}
void
meta_ui_tab_popup_free (MetaTabPopup *popup)
{
meta_verbose ("Destroying tab popup window\n");
gtk_widget_destroy (popup->outline_window);
gtk_widget_destroy (popup->window);
g_list_foreach (popup->entries, free_tab_entry, NULL);
g_list_free (popup->entries);
g_free (popup);
}
void
meta_ui_tab_popup_set_showing (MetaTabPopup *popup,
gboolean showing)
{
if (showing)
{
gtk_widget_show_all (popup->window);
}
else
{
if (GTK_WIDGET_VISIBLE (popup->window))
{
meta_verbose ("Hiding tab popup window\n");
gtk_widget_hide (popup->window);
meta_core_increment_event_serial (gdk_display);
}
}
}
static void
display_entry (MetaTabPopup *popup,
TabEntry *te)
{
GdkRectangle rect;
GdkRegion *region;
GdkRegion *inner_region;
if (popup->current_selected_entry)
{
if (popup->outline)
unselect_image (popup->current_selected_entry->widget);
else
unselect_workspace (popup->current_selected_entry->widget);
}
gtk_label_set_markup (GTK_LABEL (popup->label), te->title);
if (popup->outline)
select_image (te->widget);
else
select_workspace (te->widget);
if (popup->outline)
{
/* Do stuff behind gtk's back */
gdk_window_hide (popup->outline_window->window);
meta_core_increment_event_serial (gdk_display);
rect = te->rect;
rect.x = 0;
rect.y = 0;
gdk_window_move_resize (popup->outline_window->window,
te->rect.x, te->rect.y,
te->rect.width, te->rect.height);
gdk_window_set_background (popup->outline_window->window,
&popup->outline_window->style->black);
region = gdk_region_rectangle (&rect);
inner_region = gdk_region_rectangle (&te->inner_rect);
gdk_region_subtract (region, inner_region);
gdk_region_destroy (inner_region);
gdk_window_shape_combine_region (popup->outline_window->window,
region,
0, 0);
gdk_region_destroy (region);
/* This should piss off gtk a bit, but we don't want to raise
* above the tab popup. So, instead of calling gtk_widget_show,
* we manually set the window as mapped and then manually map it
* with gdk functions.
*/
GTK_WIDGET_SET_FLAGS (popup->outline_window, GTK_MAPPED);
gdk_window_show_unraised (popup->outline_window->window);
}
/* Must be before we handle an expose for the outline window */
popup->current_selected_entry = te;
}
void
meta_ui_tab_popup_forward (MetaTabPopup *popup)
{
if (popup->current != NULL)
popup->current = popup->current->next;
if (popup->current == NULL)
popup->current = popup->entries;
if (popup->current != NULL)
{
TabEntry *te;
te = popup->current->data;
display_entry (popup, te);
}
}
void
meta_ui_tab_popup_backward (MetaTabPopup *popup)
{
if (popup->current != NULL)
popup->current = popup->current->prev;
if (popup->current == NULL)
popup->current = g_list_last (popup->entries);
if (popup->current != NULL)
{
TabEntry *te;
te = popup->current->data;
display_entry (popup, te);
}
}
MetaTabEntryKey
meta_ui_tab_popup_get_selected (MetaTabPopup *popup)
{
if (popup->current)
{
TabEntry *te;
te = popup->current->data;
return te->key;
}
else
return (MetaTabEntryKey)None;
}
void
meta_ui_tab_popup_select (MetaTabPopup *popup,
MetaTabEntryKey key)
{
GList *tmp;
/* Note, "key" may not be in the list of entries; other code assumes
* it's OK to pass in a key that isn't.
*/
tmp = popup->entries;
while (tmp != NULL)
{
TabEntry *te;
te = tmp->data;
if (te->key == key)
{
popup->current = tmp;
display_entry (popup, te);
return;
}
tmp = tmp->next;
}
}
#define META_TYPE_SELECT_IMAGE (meta_select_image_get_type ())
#define META_SELECT_IMAGE(obj) (GTK_CHECK_CAST ((obj), META_TYPE_SELECT_IMAGE, MetaSelectImage))
typedef struct _MetaSelectImage MetaSelectImage;
typedef struct _MetaSelectImageClass MetaSelectImageClass;
struct _MetaSelectImage
{
GtkImage parent_instance;
guint selected : 1;
};
struct _MetaSelectImageClass
{
GtkImageClass parent_class;
};
static GType meta_select_image_get_type (void) G_GNUC_CONST;
static GtkWidget*
selectable_image_new (GdkPixbuf *pixbuf)
{
GtkWidget *w;
w = g_object_new (meta_select_image_get_type (), NULL);
gtk_image_set_from_pixbuf (GTK_IMAGE (w), pixbuf);
return w;
}
static void
select_image (GtkWidget *widget)
{
META_SELECT_IMAGE (widget)->selected = TRUE;
gtk_widget_queue_draw (widget);
}
static void
unselect_image (GtkWidget *widget)
{
META_SELECT_IMAGE (widget)->selected = FALSE;
gtk_widget_queue_draw (widget);
}
static void meta_select_image_class_init (MetaSelectImageClass *klass);
static gboolean meta_select_image_expose_event (GtkWidget *widget,
GdkEventExpose *event);
static GtkImageClass *parent_class;
GType
meta_select_image_get_type (void)
{
static GtkType image_type = 0;
if (!image_type)
{
static const GTypeInfo image_info =
{
sizeof (MetaSelectImageClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) meta_select_image_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (MetaSelectImage),
16, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
image_type = g_type_register_static (GTK_TYPE_IMAGE, "MetaSelectImage", &image_info, 0);
}
return image_type;
}
static void
meta_select_image_class_init (MetaSelectImageClass *klass)
{
GtkWidgetClass *widget_class;
parent_class = gtk_type_class (gtk_image_get_type ());
widget_class = GTK_WIDGET_CLASS (klass);
widget_class->expose_event = meta_select_image_expose_event;
}
static gboolean
meta_select_image_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
if (META_SELECT_IMAGE (widget)->selected)
{
int x, y, w, h;
GtkMisc *misc;
misc = GTK_MISC (widget);
x = (widget->allocation.x * (1.0 - misc->xalign) +
(widget->allocation.x + widget->allocation.width
- (widget->requisition.width - misc->xpad * 2)) *
misc->xalign) + 0.5;
y = (widget->allocation.y * (1.0 - misc->yalign) +
(widget->allocation.y + widget->allocation.height
- (widget->requisition.height - misc->ypad * 2)) *
misc->yalign) + 0.5;
x -= INSIDE_SELECT_RECT + 1;
y -= INSIDE_SELECT_RECT + 1;
w = widget->requisition.width - OUTSIDE_SELECT_RECT * 2 - 1;
h = widget->requisition.height - OUTSIDE_SELECT_RECT * 2 - 1;
gdk_draw_rectangle (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
FALSE,
x, y, w, h);
gdk_draw_rectangle (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
FALSE,
x - 1, y - 1, w + 2, h + 2);
#if 0
gdk_draw_rectangle (widget->window,
widget->style->bg_gc[GTK_STATE_SELECTED],
TRUE,
x, y, w, h);
#endif
#if 0
gtk_paint_focus (widget->style, widget->window,
&event->area, widget, "meta-tab-image",
x, y, w, h);
#endif
}
return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
}
#define META_TYPE_SELECT_WORKSPACE (meta_select_workspace_get_type ())
#define META_SELECT_WORKSPACE(obj) (GTK_CHECK_CAST ((obj), META_TYPE_SELECT_WORKSPACE, MetaSelectWorkspace))
typedef struct _MetaSelectWorkspace MetaSelectWorkspace;
typedef struct _MetaSelectWorkspaceClass MetaSelectWorkspaceClass;
struct _MetaSelectWorkspace
{
GtkDrawingArea parent_instance;
MetaWorkspace *workspace;
guint selected : 1;
};
struct _MetaSelectWorkspaceClass
{
GtkDrawingAreaClass parent_class;
};
static GType meta_select_workspace_get_type (void) G_GNUC_CONST;
#define SELECT_OUTLINE_WIDTH 2
#define MINI_WORKSPACE_WIDTH 48
static GtkWidget*
selectable_workspace_new (MetaWorkspace *workspace)
{
GtkWidget *widget;
double screen_aspect;
widget = g_object_new (meta_select_workspace_get_type (), NULL);
screen_aspect = (double) workspace->screen->rect.height /
(double) workspace->screen->rect.width;
/* account for select rect */
gtk_widget_set_size_request (widget,
MINI_WORKSPACE_WIDTH + SELECT_OUTLINE_WIDTH * 2,
MINI_WORKSPACE_WIDTH * screen_aspect + SELECT_OUTLINE_WIDTH * 2);
META_SELECT_WORKSPACE (widget)->workspace = workspace;
return widget;
}
static void
select_workspace (GtkWidget *widget)
{
META_SELECT_WORKSPACE(widget)->selected = TRUE;
gtk_widget_queue_draw (widget);
}
static void
unselect_workspace (GtkWidget *widget)
{
META_SELECT_WORKSPACE (widget)->selected = FALSE;
gtk_widget_queue_draw (widget);
}
static void meta_select_workspace_class_init (MetaSelectWorkspaceClass *klass);
static gboolean meta_select_workspace_expose_event (GtkWidget *widget,
GdkEventExpose *event);
GType
meta_select_workspace_get_type (void)
{
static GtkType workspace_type = 0;
if (!workspace_type)
{
static const GTypeInfo workspace_info =
{
sizeof (MetaSelectWorkspaceClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) meta_select_workspace_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (MetaSelectWorkspace),
16, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
workspace_type = g_type_register_static (GTK_TYPE_DRAWING_AREA,
"MetaSelectWorkspace",
&workspace_info,
0);
}
return workspace_type;
}
static void
meta_select_workspace_class_init (MetaSelectWorkspaceClass *klass)
{
GtkWidgetClass *widget_class;
widget_class = GTK_WIDGET_CLASS (klass);
widget_class->expose_event = meta_select_workspace_expose_event;
}
/**
* meta_convert_meta_to_wnck() converts a MetaWindow to a
* WnckWindowDisplayInfo window that is used to build a thumbnail of a
* workspace.
**/
static WnckWindowDisplayInfo
meta_convert_meta_to_wnck (MetaWindow *window, MetaScreen *screen)
{
WnckWindowDisplayInfo wnck_window;
wnck_window.icon = window->icon;
wnck_window.mini_icon = window->mini_icon;
wnck_window.is_active = FALSE;
if (window == window->display->expected_focus_window)
wnck_window.is_active = TRUE;
if (window->frame)
{
wnck_window.x = window->frame->rect.x;
wnck_window.y = window->frame->rect.y;
wnck_window.width = window->frame->rect.width;
wnck_window.height = window->frame->rect.height;
}
else
{
wnck_window.x = window->rect.x;
wnck_window.y = window->rect.y;
wnck_window.width = window->rect.width;
wnck_window.height = window->rect.height;
}
return wnck_window;
}
static gboolean
meta_select_workspace_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
MetaWorkspace *workspace;
WnckWindowDisplayInfo *windows;
int i, n_windows;
GList *tmp, *list;
workspace = META_SELECT_WORKSPACE (widget)->workspace;
list = meta_stack_list_windows (workspace->screen->stack, workspace);
n_windows = g_list_length (list);
windows = g_new (WnckWindowDisplayInfo, n_windows);
tmp = list;
i = 0;
while (tmp != NULL)
{
MetaWindow *window;
gboolean ignoreable_sticky;
window = tmp->data;
ignoreable_sticky = window->on_all_workspaces &&
workspace != workspace->screen->active_workspace;
if (window->skip_pager ||
!meta_window_showing_on_its_workspace (window) ||
window->unmaps_pending ||
ignoreable_sticky)
{
--n_windows;
}
else
{
windows[i] = meta_convert_meta_to_wnck (window, workspace->screen);
i++;
}
tmp = tmp->next;
}
g_list_free (list);
wnck_draw_workspace (widget,
widget->window,
SELECT_OUTLINE_WIDTH,
SELECT_OUTLINE_WIDTH,
widget->allocation.width - SELECT_OUTLINE_WIDTH * 2,
widget->allocation.height - SELECT_OUTLINE_WIDTH * 2,
workspace->screen->rect.width,
workspace->screen->rect.height,
NULL,
(workspace->screen->active_workspace == workspace),
windows,
n_windows);
g_free (windows);
if (META_SELECT_WORKSPACE (widget)->selected)
{
i = SELECT_OUTLINE_WIDTH - 1;
while (i >= 0)
{
gdk_draw_rectangle (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
FALSE,
i,
i,
widget->allocation.width - i * 2 - 1,
widget->allocation.height - i * 2 - 1);
--i;
}
}
return TRUE;
}
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