// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/gtk/gtk_window_util.h"
#include <dlfcn.h>
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "ui/base/base_window.h"
using content::RenderWidgetHost;
using content::WebContents;
namespace gtk_window_util {
const int kFrameBorderThickness = 4;
const int kResizeAreaCornerSize = 16;
// Keep track of the last click time and the last click position so we can
// filter out extra GDK_BUTTON_PRESS events when a double click happens.
static guint32 last_click_time;
static int last_click_x;
static int last_click_y;
// Performs Cut/Copy/Paste operation on the |window|.
// If the current render view is focused, then just call the specified |method|
// against the current render view host, otherwise emit the specified |signal|
// against the focused widget.
// TODO(suzhe): This approach does not work for plugins.
void DoCutCopyPaste(GtkWindow* window,
WebContents* web_contents,
void (RenderWidgetHost::*method)(),
const char* signal) {
GtkWidget* widget = gtk_window_get_focus(window);
if (widget == NULL)
return; // Do nothing if no focused widget.
if (web_contents &&
widget == web_contents->GetView()->GetContentNativeView()) {
(web_contents->GetRenderViewHost()->*method)();
} else {
guint id;
if ((id = g_signal_lookup(signal, G_OBJECT_TYPE(widget))) != 0)
g_signal_emit(widget, id, 0);
}
}
void DoCut(GtkWindow* window, WebContents* web_contents) {
DoCutCopyPaste(window, web_contents,
&RenderWidgetHost::Cut, "cut-clipboard");
}
void DoCopy(GtkWindow* window, WebContents* web_contents) {
DoCutCopyPaste(window, web_contents,
&RenderWidgetHost::Copy, "copy-clipboard");
}
void DoPaste(GtkWindow* window, WebContents* web_contents) {
DoCutCopyPaste(window, web_contents,
&RenderWidgetHost::Paste, "paste-clipboard");
}
// Ubuntu patches their version of GTK+ so that there is always a
// gripper in the bottom right corner of the window. We dynamically
// look up this symbol because it's a non-standard Ubuntu extension to
// GTK+. We always need to disable this feature since we can't
// communicate this to WebKit easily.
typedef void (*gtk_window_set_has_resize_grip_func)(GtkWindow*, gboolean);
gtk_window_set_has_resize_grip_func gtk_window_set_has_resize_grip_sym;
void DisableResizeGrip(GtkWindow* window) {
static bool resize_grip_looked_up = false;
if (!resize_grip_looked_up) {
resize_grip_looked_up = true;
gtk_window_set_has_resize_grip_sym =
reinterpret_cast<gtk_window_set_has_resize_grip_func>(
dlsym(NULL, "gtk_window_set_has_resize_grip"));
}
if (gtk_window_set_has_resize_grip_sym)
gtk_window_set_has_resize_grip_sym(window, FALSE);
}
GdkCursorType GdkWindowEdgeToGdkCursorType(GdkWindowEdge edge) {
switch (edge) {
case GDK_WINDOW_EDGE_NORTH_WEST:
return GDK_TOP_LEFT_CORNER;
case GDK_WINDOW_EDGE_NORTH:
return GDK_TOP_SIDE;
case GDK_WINDOW_EDGE_NORTH_EAST:
return GDK_TOP_RIGHT_CORNER;
case GDK_WINDOW_EDGE_WEST:
return GDK_LEFT_SIDE;
case GDK_WINDOW_EDGE_EAST:
return GDK_RIGHT_SIDE;
case GDK_WINDOW_EDGE_SOUTH_WEST:
return GDK_BOTTOM_LEFT_CORNER;
case GDK_WINDOW_EDGE_SOUTH:
return GDK_BOTTOM_SIDE;
case GDK_WINDOW_EDGE_SOUTH_EAST:
return GDK_BOTTOM_RIGHT_CORNER;
default:
NOTREACHED();
}
return GDK_LAST_CURSOR;
}
bool BoundsMatchMonitorSize(GtkWindow* window, gfx::Rect bounds) {
// A screen can be composed of multiple monitors.
GdkScreen* screen = gtk_window_get_screen(window);
GdkRectangle monitor_size;
if (gtk_widget_get_realized(GTK_WIDGET(window))) {
// |window| has been realized.
gint monitor_num = gdk_screen_get_monitor_at_window(screen,
gtk_widget_get_window(GTK_WIDGET(window)));
gdk_screen_get_monitor_geometry(screen, monitor_num, &monitor_size);
return bounds.size() == gfx::Size(monitor_size.width, monitor_size.height);
}
// Make sure the window doesn't match any monitor size. We compare against
// all monitors because we don't know which monitor the window is going to
// open on before window realized.
gint num_monitors = gdk_screen_get_n_monitors(screen);
for (gint i = 0; i < num_monitors; ++i) {
GdkRectangle monitor_size;
gdk_screen_get_monitor_geometry(screen, i, &monitor_size);
if (bounds.size() == gfx::Size(monitor_size.width, monitor_size.height))
return true;
}
return false;
}
bool HandleTitleBarLeftMousePress(
GtkWindow* window,
const gfx::Rect& bounds,
GdkEventButton* event) {
// We want to start a move when the user single clicks, but not start a
// move when the user double clicks. However, a double click sends the
// following GDK events: GDK_BUTTON_PRESS, GDK_BUTTON_RELEASE,
// GDK_BUTTON_PRESS, GDK_2BUTTON_PRESS, GDK_BUTTON_RELEASE. If we
// start a gtk_window_begin_move_drag on the second GDK_BUTTON_PRESS,
// the call to gtk_window_maximize fails. To work around this, we
// keep track of the last click and if it's going to be a double click,
// we don't call gtk_window_begin_move_drag.
DCHECK(event->type == GDK_BUTTON_PRESS);
DCHECK(event->button == 1);
static GtkSettings* settings = gtk_settings_get_default();
gint double_click_time = 250;
gint double_click_distance = 5;
g_object_get(G_OBJECT(settings),
"gtk-double-click-time", &double_click_time,
"gtk-double-click-distance", &double_click_distance,
NULL);
guint32 click_time = event->time - last_click_time;
int click_move_x = abs(event->x - last_click_x);
int click_move_y = abs(event->y - last_click_y);
last_click_time = event->time;
last_click_x = static_cast<int>(event->x);
last_click_y = static_cast<int>(event->y);
if (click_time > static_cast<guint32>(double_click_time) ||
click_move_x > double_click_distance ||
click_move_y > double_click_distance) {
// Ignore drag requests if the window is the size of the screen.
// We do this to avoid triggering fullscreen mode in metacity
// (without the --no-force-fullscreen flag) and in compiz (with
// Legacy Fullscreen Mode enabled).
if (!BoundsMatchMonitorSize(window, bounds)) {
gtk_window_begin_move_drag(window, event->button,
static_cast<gint>(event->x_root),
static_cast<gint>(event->y_root),
event->time);
}
return TRUE;
}
return FALSE;
}
void UnMaximize(GtkWindow* window,
const gfx::Rect& bounds,
const gfx::Rect& restored_bounds) {
gtk_window_unmaximize(window);
// It can happen that you end up with a window whose restore size is the same
// as the size of the screen, so unmaximizing it merely remaximizes it due to
// the same WM feature that SetWindowSize() works around. We try to detect
// this and resize the window to work around the issue.
if (bounds.size() == restored_bounds.size())
gtk_window_resize(window, bounds.width(), bounds.height() - 1);
}
void SetWindowCustomClass(GtkWindow* window, const std::string& wmclass) {
gtk_window_set_wmclass(window,
wmclass.c_str(),
gdk_get_program_class());
// Set WM_WINDOW_ROLE for session management purposes.
// See http://tronche.com/gui/x/icccm/sec-5.html .
gtk_window_set_role(window, wmclass.c_str());
}
void SetWindowSize(GtkWindow* window, const gfx::Size& size) {
gfx::Size new_size = size;
gint current_width = 0;
gint current_height = 0;
gtk_window_get_size(window, ¤t_width, ¤t_height);
GdkRectangle size_with_decorations = {0};
GdkWindow* gdk_window = gtk_widget_get_window(GTK_WIDGET(window));
if (gdk_window) {
gdk_window_get_frame_extents(gdk_window,
&size_with_decorations);
}
if (current_width == size_with_decorations.width &&
current_height == size_with_decorations.height) {
// Make sure the window doesn't match any monitor size. We compare against
// all monitors because we don't know which monitor the window is going to
// open on (the WM decides that).
GdkScreen* screen = gtk_window_get_screen(window);
gint num_monitors = gdk_screen_get_n_monitors(screen);
for (gint i = 0; i < num_monitors; ++i) {
GdkRectangle monitor_size;
gdk_screen_get_monitor_geometry(screen, i, &monitor_size);
if (gfx::Size(monitor_size.width, monitor_size.height) == size) {
gtk_window_resize(window, size.width(), size.height() - 1);
return;
}
}
} else {
// gtk_window_resize is the size of the window not including decorations,
// but we are given the |size| including window decorations.
if (size_with_decorations.width > current_width) {
new_size.set_width(size.width() - size_with_decorations.width +
current_width);
}
if (size_with_decorations.height > current_height) {
new_size.set_height(size.height() - size_with_decorations.height +
current_height);
}
}
gtk_window_resize(window, new_size.width(), new_size.height());
}
void UpdateWindowPosition(ui::BaseWindow* window,
gfx::Rect* bounds,
gfx::Rect* restored_bounds) {
gint x, y;
gtk_window_get_position(window->GetNativeWindow(), &x, &y);
(*bounds).set_origin(gfx::Point(x, y));
if (!window->IsFullscreen() && !window->IsMaximized())
*restored_bounds = *bounds;
}
bool GetWindowEdge(const gfx::Size& window_size,
int top_edge_inset,
int x,
int y,
GdkWindowEdge* edge) {
gfx::Rect middle(window_size);
middle.Inset(kFrameBorderThickness,
kFrameBorderThickness - top_edge_inset,
kFrameBorderThickness,
kFrameBorderThickness);
if (middle.Contains(x, y))
return false;
gfx::Rect north(0, 0, window_size.width(),
kResizeAreaCornerSize - top_edge_inset);
gfx::Rect west(0, 0, kResizeAreaCornerSize, window_size.height());
gfx::Rect south(0, window_size.height() - kResizeAreaCornerSize,
window_size.width(), kResizeAreaCornerSize);
gfx::Rect east(window_size.width() - kResizeAreaCornerSize, 0,
kResizeAreaCornerSize, window_size.height());
if (north.Contains(x, y)) {
if (west.Contains(x, y))
*edge = GDK_WINDOW_EDGE_NORTH_WEST;
else if (east.Contains(x, y))
*edge = GDK_WINDOW_EDGE_NORTH_EAST;
else
*edge = GDK_WINDOW_EDGE_NORTH;
} else if (south.Contains(x, y)) {
if (west.Contains(x, y))
*edge = GDK_WINDOW_EDGE_SOUTH_WEST;
else if (east.Contains(x, y))
*edge = GDK_WINDOW_EDGE_SOUTH_EAST;
else
*edge = GDK_WINDOW_EDGE_SOUTH;
} else {
if (west.Contains(x, y))
*edge = GDK_WINDOW_EDGE_WEST;
else if (east.Contains(x, y))
*edge = GDK_WINDOW_EDGE_EAST;
else
return false; // The cursor must be outside the window.
}
return true;
}
} // namespace gtk_window_util