From 2c28725722867c594f34767afcad12865433ee2a Mon Sep 17 00:00:00 2001 From: Cheng Zhao Date: Wed, 15 Jan 2014 15:15:45 +0000 Subject: [PATCH] gtk: Support frameless window. --- atom.gyp | 2 + browser/native_window_gtk.cc | 149 ++++++++++++++- browser/native_window_gtk.h | 29 ++- browser/ui/gtk/gtk_window_util.cc | 295 ++++++++++++++++++++++++++++++ browser/ui/gtk/gtk_window_util.h | 74 ++++++++ 5 files changed, 542 insertions(+), 7 deletions(-) create mode 100644 browser/ui/gtk/gtk_window_util.cc create mode 100644 browser/ui/gtk/gtk_window_util.h diff --git a/atom.gyp b/atom.gyp index 05bcdd10b9b2..9cd9f29677b7 100644 --- a/atom.gyp +++ b/atom.gyp @@ -123,6 +123,8 @@ 'browser/ui/message_box_win.cc', 'browser/ui/nsalert_synchronous_sheet_mac.h', 'browser/ui/nsalert_synchronous_sheet_mac.mm', + 'browser/ui/gtk/gtk_window_util.cc', + 'browser/ui/gtk/gtk_window_util.h', 'browser/ui/win/menu_2.cc', 'browser/ui/win/menu_2.h', 'browser/ui/win/native_menu_win.cc', diff --git a/browser/native_window_gtk.cc b/browser/native_window_gtk.cc index f749e19d095e..711b8b9bc32c 100644 --- a/browser/native_window_gtk.cc +++ b/browser/native_window_gtk.cc @@ -5,10 +5,13 @@ #include "browser/native_window_gtk.h" #include "base/values.h" +#include "browser/ui/gtk/gtk_window_util.h" +#include "common/draggable_region.h" #include "common/options_switches.h" #include "content/public/browser/web_contents.h" #include "content/public/browser/web_contents_view.h" #include "content/public/common/renderer_preferences.h" +#include "ui/base/x/x11_util.h" #include "ui/gfx/gtk_util.h" #include "ui/gfx/rect.h" #include "ui/gfx/skia_utils_gtk.h" @@ -28,7 +31,7 @@ NativeWindowGtk::NativeWindowGtk(content::WebContents* web_contents, base::DictionaryValue* options) : NativeWindow(web_contents, options), window_(GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL))), - fullscreen_(false), + state_(GDK_WINDOW_STATE_WITHDRAWN), is_always_on_top_(false) { gtk_container_add(GTK_CONTAINER(window_), GetWebContents()->GetView()->GetNativeView()); @@ -38,17 +41,30 @@ NativeWindowGtk::NativeWindowGtk(content::WebContents* web_contents, options->GetInteger(switches::kHeight, &height); gtk_window_set_default_size(window_, width, height); - if (!has_frame_) - gtk_window_set_decorated(window_, false); - if (!icon_.IsEmpty()) gtk_window_set_icon(window_, icon_.ToGdkPixbuf()); + // In some (older) versions of compiz, raising top-level windows when they + // are partially off-screen causes them to get snapped back on screen, not + // always even on the current virtual desktop. If we are running under + // compiz, suppress such raises, as they are not necessary in compiz anyway. + if (ui::GuessWindowManager() == ui::WM_COMPIZ) + suppress_window_raise_ = true; + g_signal_connect(window_, "delete-event", G_CALLBACK(OnWindowDeleteEventThunk), this); g_signal_connect(window_, "focus-out-event", G_CALLBACK(OnFocusOutThunk), this); + if (!has_frame_) { + gtk_window_set_decorated(window_, false); + + g_signal_connect(window_, "motion-notify-event", + G_CALLBACK(OnMouseMoveEventThunk), this); + g_signal_connect(window_, "button-press-event", + G_CALLBACK(OnButtonPressThunk), this); + } + SetWebKitColorStyle(); } @@ -111,7 +127,6 @@ void NativeWindowGtk::Restore() { } void NativeWindowGtk::SetFullscreen(bool fullscreen) { - fullscreen_ = fullscreen; if (fullscreen) gtk_window_fullscreen(window_); else @@ -119,7 +134,7 @@ void NativeWindowGtk::SetFullscreen(bool fullscreen) { } bool NativeWindowGtk::IsFullscreen() { - return fullscreen_; + return state_ & GDK_WINDOW_STATE_FULLSCREEN; } void NativeWindowGtk::SetSize(const gfx::Size& size) { @@ -238,6 +253,27 @@ gfx::NativeWindow NativeWindowGtk::GetNativeWindow() { void NativeWindowGtk::UpdateDraggableRegions( const std::vector& regions) { + // Draggable region is not supported for non-frameless window. + if (has_frame_) + return; + + SkRegion draggable_region; + + // By default, the whole window is non-draggable. We need to explicitly + // include those draggable regions. + for (std::vector::const_iterator iter = + regions.begin(); + iter != regions.end(); ++iter) { + const DraggableRegion& region = *iter; + draggable_region.op( + region.bounds.x(), + region.bounds.y(), + region.bounds.right(), + region.bounds.bottom(), + region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op); + } + + draggable_region_ = draggable_region; } void NativeWindowGtk::SetWebKitColorStyle() { @@ -269,6 +305,20 @@ void NativeWindowGtk::SetWebKitColorStyle() { 0; } +bool NativeWindowGtk::IsMaximized() const { + return state_ & GDK_WINDOW_STATE_MAXIMIZED; +} + +bool NativeWindowGtk::GetWindowEdge(int x, int y, GdkWindowEdge* edge) { + if (has_frame_) + return false; + + if (IsMaximized() || IsFullscreen()) + return false; + + return gtk_window_util::GetWindowEdge(GetSize(), 0, x, y, edge); +} + gboolean NativeWindowGtk::OnWindowDeleteEvent(GtkWidget* widget, GdkEvent* event) { Close(); @@ -280,6 +330,93 @@ gboolean NativeWindowGtk::OnFocusOut(GtkWidget* window, GdkEventFocus*) { return FALSE; } +gboolean NativeWindowGtk::OnWindowState(GtkWidget* window, + GdkEventWindowState* event) { + state_ = event->new_window_state; + return FALSE; +} + +gboolean NativeWindowGtk::OnMouseMoveEvent(GtkWidget* widget, + GdkEventMotion* event) { + if (!IsResizable()) + return FALSE; + + int win_x, win_y; + GdkWindow* gdk_window = gtk_widget_get_window(GTK_WIDGET(window_)); + gdk_window_get_origin(gdk_window, &win_x, &win_y); + gfx::Point point(static_cast(event->x_root - win_x), + static_cast(event->y_root - win_y)); + + // Update the cursor if we're on the custom frame border. + GdkWindowEdge edge; + bool has_hit_edge = GetWindowEdge(point.x(), point.y(), &edge); + GdkCursorType new_cursor = GDK_LAST_CURSOR; + if (has_hit_edge) + new_cursor = gtk_window_util::GdkWindowEdgeToGdkCursorType(edge); + + GdkCursorType last_cursor = GDK_LAST_CURSOR; + if (frame_cursor_) + last_cursor = frame_cursor_->type; + + if (last_cursor != new_cursor) { + frame_cursor_ = has_hit_edge ? gfx::GetCursor(new_cursor) : NULL; + gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(window_)), + frame_cursor_); + } + return FALSE; +} + +gboolean NativeWindowGtk::OnButtonPress(GtkWidget* widget, + GdkEventButton* event) { + // Make the button press coordinate relative to the browser window. + int win_x, win_y; + GdkWindow* gdk_window = gtk_widget_get_window(GTK_WIDGET(window_)); + gdk_window_get_origin(gdk_window, &win_x, &win_y); + + bool resizable = IsResizable(); + GdkWindowEdge edge; + gfx::Point point(static_cast(event->x_root - win_x), + static_cast(event->y_root - win_y)); + bool has_hit_edge = resizable && GetWindowEdge(point.x(), point.y(), &edge); + bool has_hit_titlebar = !draggable_region_.isEmpty() && + draggable_region_.contains(event->x, event->y); + + if (event->button == 1) { + if (GDK_BUTTON_PRESS == event->type) { + // Raise the window after a click on either the titlebar or the border to + // match the behavior of most window managers, unless that behavior has + // been suppressed. + if ((has_hit_titlebar || has_hit_edge) && !suppress_window_raise_) + gdk_window_raise(GTK_WIDGET(widget)->window); + + if (has_hit_edge) { + gtk_window_begin_resize_drag(window_, edge, event->button, + static_cast(event->x_root), + static_cast(event->y_root), + event->time); + return TRUE; + } else if (has_hit_titlebar) { + return gtk_window_util::HandleTitleBarLeftMousePress( + window_, gfx::Rect(GetPosition(), GetSize()), event); + } + } else if (GDK_2BUTTON_PRESS == event->type) { + if (has_hit_titlebar && resizable) { + // Maximize/restore on double click. + if (IsMaximized()) + gtk_window_unmaximize(window_); + else + gtk_window_maximize(window_); + return TRUE; + } + } + } else if (event->button == 2) { + if (has_hit_titlebar || has_hit_edge) + gdk_window_lower(gdk_window); + return TRUE; + } + return FALSE; +} + // static NativeWindow* NativeWindow::Create(content::WebContents* web_contents, base::DictionaryValue* options) { diff --git a/browser/native_window_gtk.h b/browser/native_window_gtk.h index 96ca18edd4e1..6fee4fc66103 100644 --- a/browser/native_window_gtk.h +++ b/browser/native_window_gtk.h @@ -8,6 +8,7 @@ #include #include "browser/native_window.h" +#include "third_party/skia/include/core/SkRegion.h" #include "ui/base/gtk/gtk_signal.h" #include "ui/gfx/size.h" @@ -63,17 +64,43 @@ class NativeWindowGtk : public NativeWindow { // Set WebKit's style from current theme. void SetWebKitColorStyle(); + // Whether window is maximized. + bool IsMaximized() const; + + // If the point (|x|, |y|) is within the resize border area of the window, + // returns true and sets |edge| to the appropriate GdkWindowEdge value. + // Otherwise, returns false. + bool GetWindowEdge(int x, int y, GdkWindowEdge* edge); + CHROMEGTK_CALLBACK_1(NativeWindowGtk, gboolean, OnWindowDeleteEvent, GdkEvent*); CHROMEGTK_CALLBACK_1(NativeWindowGtk, gboolean, OnFocusOut, GdkEventFocus*); + CHROMEGTK_CALLBACK_1(NativeWindowGtk, gboolean, OnWindowState, + GdkEventWindowState*); + CHROMEGTK_CALLBACK_1(NativeWindowGtk, gboolean, OnMouseMoveEvent, + GdkEventMotion*); + CHROMEGTK_CALLBACK_1(NativeWindowGtk, gboolean, OnButtonPress, + GdkEventButton*); GtkWindow* window_; - bool fullscreen_; + GdkWindowState state_; bool is_always_on_top_; gfx::Size minimum_size_; gfx::Size maximum_size_; + // The region is treated as title bar, can be dragged to move + // and double clicked to maximize. + SkRegion draggable_region_; + + // If true, don't call gdk_window_raise() when we get a click in the title + // bar or window border. This is to work around a compiz bug. + bool suppress_window_raise_; + + // The current window cursor. We set it to a resize cursor when over the + // custom frame border. We set it to NULL if we want the default cursor. + GdkCursor* frame_cursor_; + DISALLOW_COPY_AND_ASSIGN(NativeWindowGtk); }; diff --git a/browser/ui/gtk/gtk_window_util.cc b/browser/ui/gtk/gtk_window_util.cc new file mode 100644 index 000000000000..7cd84b9506ce --- /dev/null +++ b/browser/ui/gtk/gtk_window_util.cc @@ -0,0 +1,295 @@ +// 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 "browser/ui/gtk/gtk_window_util.h" + +#include +#include "content/public/browser/render_view_host.h" +#include "content/public/browser/web_contents.h" +#include "content/public/browser/web_contents_view.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( + 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(event->x); + last_click_y = static_cast(event->y); + + if (click_time > static_cast(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(event->x_root), + static_cast(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()); +} + +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 diff --git a/browser/ui/gtk/gtk_window_util.h b/browser/ui/gtk/gtk_window_util.h new file mode 100644 index 000000000000..2234f38e2640 --- /dev/null +++ b/browser/ui/gtk/gtk_window_util.h @@ -0,0 +1,74 @@ +// 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. + +#ifndef ATOM_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_ +#define ATOM_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_ + +#include +#include +#include "ui/gfx/rect.h" + +namespace content { +class WebContents; +} + +namespace gtk_window_util { + +// The frame border is only visible in restored mode and is hardcoded to 4 px +// on each side regardless of the system window border size. +extern const int kFrameBorderThickness; +// In the window corners, the resize areas don't actually expand bigger, but +// the 16 px at the end of each edge triggers diagonal resizing. +extern const int kResizeAreaCornerSize; + +// Performs Cut/Copy/Paste operation on the |window|'s |web_contents|. +void DoCut(GtkWindow* window, content::WebContents* web_contents); +void DoCopy(GtkWindow* window, content::WebContents* web_contents); +void DoPaste(GtkWindow* window, content::WebContents* web_contents); + +// Ubuntu patches their version of GTK+ to that there is always a +// gripper in the bottom right corner of the window. We always need to +// disable this feature since we can't communicate this to WebKit easily. +void DisableResizeGrip(GtkWindow* window); + +// Returns the resize cursor corresponding to the window |edge|. +GdkCursorType GdkWindowEdgeToGdkCursorType(GdkWindowEdge edge); + +// Returns |true| if the window bounds match the monitor size. +bool BoundsMatchMonitorSize(GtkWindow* window, gfx::Rect bounds); + +bool HandleTitleBarLeftMousePress(GtkWindow* window, + const gfx::Rect& bounds, + GdkEventButton* event); + +// Request the underlying window to unmaximize. Also tries to work around +// a window manager "feature" that can prevent this in some edge cases. +void UnMaximize(GtkWindow* window, + const gfx::Rect& bounds, + const gfx::Rect& restored_bounds); + +// Set a custom WM_CLASS for a window. +void SetWindowCustomClass(GtkWindow* window, const std::string& wmclass); + +// A helper method for setting the GtkWindow size that should be used in place +// of calling gtk_window_resize directly. This is done to avoid a WM "feature" +// where setting the window size to the monitor size causes the WM to set the +// EWMH for full screen mode. +void SetWindowSize(GtkWindow* window, const gfx::Size& size); + +// If the point (|x|, |y|) is within the resize border area of the window, +// returns true and sets |edge| to the appropriate GdkWindowEdge value. +// Otherwise, returns false. +// |top_edge_inset| specifies how much smaller (in px) than the default edge +// size the top edge should be, used by browser windows to make it easier to +// move the window since a lot of title bar space is taken by the tabs. +bool GetWindowEdge(const gfx::Size& window_size, + int top_edge_inset, + int x, + int y, + GdkWindowEdge* edge); + +} // namespace gtk_window_util + +#endif // ATOM_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_