diff options
Diffstat (limited to 'base/gfx')
| -rw-r--r-- | base/gfx/gtk_native_view_id_manager.cc | 141 | ||||
| -rw-r--r-- | base/gfx/gtk_native_view_id_manager.h | 91 | ||||
| -rw-r--r-- | base/gfx/native_widget_types.h | 31 | ||||
| -rw-r--r-- | base/gfx/native_widget_types_gtk.cc | 16 |
4 files changed, 269 insertions, 10 deletions
diff --git a/base/gfx/gtk_native_view_id_manager.cc b/base/gfx/gtk_native_view_id_manager.cc new file mode 100644 index 0000000..848e1eb --- /dev/null +++ b/base/gfx/gtk_native_view_id_manager.cc @@ -0,0 +1,141 @@ +// Copyright (c) 2009 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 "base/gfx/gtk_native_view_id_manager.h" + +#include "base/gfx/rect.h" +#include "base/logging.h" +#include "base/rand_util.h" + +#include <gtk/gtk.h> +#include <gdk/gdkx.h> + +// ----------------------------------------------------------------------------- +// Bounce functions for GTK to callback into a C++ object... + +static void OnRealize(gfx::NativeView widget, void* arg) { + GtkNativeViewManager* manager = reinterpret_cast<GtkNativeViewManager*>(arg); + manager->OnRealize(widget); +} + +static void OnUnrealize(gfx::NativeView widget, void *arg) { + GtkNativeViewManager* manager = reinterpret_cast<GtkNativeViewManager*>(arg); + manager->OnUnrealize(widget); +} + +static void OnDestroy(GtkObject* obj, void* arg) { + GtkNativeViewManager* manager = reinterpret_cast<GtkNativeViewManager*>(arg); + manager->OnDestroy(reinterpret_cast<GtkWidget*>(obj)); +} + +// ----------------------------------------------------------------------------- + + +// ----------------------------------------------------------------------------- +// Public functions... + +GtkNativeViewManager::GtkNativeViewManager() { +} + +gfx::NativeViewId GtkNativeViewManager::GetIdForWidget(gfx::NativeView widget) { + AutoLock locked(lock_); + + std::map<gfx::NativeView, gfx::NativeViewId>::const_iterator i = + native_view_to_id_.find(widget); + + if (i != native_view_to_id_.end()) + return i->second; + + gfx::NativeViewId new_id = + static_cast<gfx::NativeViewId>(base::RandUint64()); + while (id_to_info_.find(new_id) != id_to_info_.end()) + new_id = static_cast<gfx::NativeViewId>(base::RandUint64()); + + NativeViewInfo info; + if (GTK_WIDGET_REALIZED(widget)) { + GdkWindow *gdk_window = widget->window; + CHECK(gdk_window); + info.x_window_id = GDK_WINDOW_XID(gdk_window); + } + + native_view_to_id_[widget] = new_id; + id_to_info_[new_id] = info; + + g_signal_connect(widget, "realize", G_CALLBACK(::OnRealize), this); + g_signal_connect(widget, "unrealize", G_CALLBACK(::OnUnrealize), this); + g_signal_connect(widget, "destroy", G_CALLBACK(::OnDestroy), this); + + return new_id; +} + +bool GtkNativeViewManager::GetXIDForId(XID* output, gfx::NativeViewId id) { + AutoLock locked(lock_); + + std::map<gfx::NativeViewId, NativeViewInfo>::const_iterator i = + id_to_info_.find(id); + + if (i == id_to_info_.end()) + return false; + + *output = i->second.x_window_id; + return true; +} + +// ----------------------------------------------------------------------------- + + +// ----------------------------------------------------------------------------- +// Private functions... + +gfx::NativeViewId GtkNativeViewManager::GetWidgetId(gfx::NativeView widget) { + lock_.AssertAcquired(); + + std::map<gfx::NativeView, gfx::NativeViewId>::const_iterator i = + native_view_to_id_.find(widget); + + CHECK(i != native_view_to_id_.end()); + return i->second; +} + +void GtkNativeViewManager::OnRealize(gfx::NativeView widget) { + AutoLock locked(lock_); + + const gfx::NativeViewId id = GetWidgetId(widget); + std::map<gfx::NativeViewId, NativeViewInfo>::iterator i = + id_to_info_.find(id); + + CHECK(i != id_to_info_.end()); + CHECK(widget->window); + + i->second.x_window_id = GDK_WINDOW_XID(widget->window); +} + +void GtkNativeViewManager::OnUnrealize(gfx::NativeView widget) { + AutoLock locked(lock_); + + const gfx::NativeViewId id = GetWidgetId(widget); + std::map<gfx::NativeViewId, NativeViewInfo>::iterator i = + id_to_info_.find(id); + + CHECK(i != id_to_info_.end()); + + i->second.x_window_id = 0; +} + +void GtkNativeViewManager::OnDestroy(gfx::NativeView widget) { + AutoLock locked(lock_); + + std::map<gfx::NativeView, gfx::NativeViewId>::iterator i = + native_view_to_id_.find(widget); + CHECK(i != native_view_to_id_.end()); + + std::map<gfx::NativeViewId, NativeViewInfo>::iterator j = + id_to_info_.find(i->second); + CHECK(j != id_to_info_.end()); + + native_view_to_id_.erase(i); + id_to_info_.erase(j); +} + +// ----------------------------------------------------------------------------- diff --git a/base/gfx/gtk_native_view_id_manager.h b/base/gfx/gtk_native_view_id_manager.h new file mode 100644 index 0000000..5b34baa --- /dev/null +++ b/base/gfx/gtk_native_view_id_manager.h @@ -0,0 +1,91 @@ +// Copyright (c) 2009 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 BASE_GFX_GTK_NATIVE_VIEW_ID_MANAGER_H_ +#define BASE_GFX_GTK_NATIVE_VIEW_ID_MANAGER_H_ + +#include <map> + +#include "base/singleton.h" +#include "base/gfx/native_widget_types.h" + +typedef unsigned long XID; + +// NativeViewIds are the opaque values which the renderer holds as a reference +// to a window. These ids are often used in sync calls from the renderer and +// one cannot terminate sync calls on the UI thread as that can lead to +// deadlocks. +// +// Because of this, we have the BACKGROUND_X11 thread for these calls and this +// thread has a separate X connection in order to answer them. But one cannot +// use GTK on multiple threads, so the BACKGROUND_X11 thread deals only in Xlib +// calls and, thus, XIDs. +// +// So we could make NativeViewIds be the X id of the window. However, at the +// time when we need to tell the renderer about its NativeViewId, an XID isn't +// availible and it goes very much against the grain of the code to make it so. +// Also, we worry that GTK might choose to change the underlying X window id +// when, say, the widget is hidden or repacked. Finally, if we used XIDs then a +// compromised renderer could start asking questions about any X windows on the +// system. +// +// Thus, we have this object. It produces random NativeViewIds from GtkWidget +// pointers and observes the various signals from the widget for when an X +// window is created, destroyed etc. Thus it provides a thread safe mapping +// from NativeViewIds to the current XID for that widget. +// +// You get a reference to the global instance with: +// Singleton<GtkNativeViewManager>() +class GtkNativeViewManager { + public: + // Must be called from the UI thread: + // + // Return a NativeViewId for the given widget and attach to the various + // signals emitted by that widget. The NativeViewId is pseudo-randomly + // allocated so that a compromised renderer trying to guess values will fail + // with high probability. The NativeViewId will not be reused for the + // lifetime of the GtkWidget. + gfx::NativeViewId GetIdForWidget(gfx::NativeView widget); + + // May be called from any thread: + // + // xid: (output) the resulting X window ID, or 0 + // id: a value previously returned from GetIdForWidget + // returns: true if |id| is a valid id, false otherwise. + // + // If the widget referenced by |id| does not current have an X window id, + // |*xid| is set to 0. + bool GetXIDForId(XID* xid, gfx::NativeViewId id); + + // These are actually private functions, but need to be called from statics. + void OnRealize(gfx::NativeView widget); + void OnUnrealize(gfx::NativeView widget); + void OnDestroy(gfx::NativeView widget); + + private: + // This object is a singleton: + GtkNativeViewManager(); + friend struct DefaultSingletonTraits<GtkNativeViewManager>; + + struct NativeViewInfo { + NativeViewInfo() + : x_window_id(0) { + } + + XID x_window_id; + }; + + gfx::NativeViewId GetWidgetId(gfx::NativeView id); + + // protects native_view_to_id_ and id_to_info_ + Lock lock_; + // If asked for an id for the same widget twice, we want to return the same + // id. So this records the current mapping. + std::map<gfx::NativeView, gfx::NativeViewId> native_view_to_id_; + std::map<gfx::NativeViewId, NativeViewInfo> id_to_info_; + + DISALLOW_COPY_AND_ASSIGN(GtkNativeViewManager); +}; + +#endif // BASE_GFX_GTK_NATIVE_VIEW_ID_MANAGER_H_ diff --git a/base/gfx/native_widget_types.h b/base/gfx/native_widget_types.h index 32d6012..d43db5c 100644 --- a/base/gfx/native_widget_types.h +++ b/base/gfx/native_widget_types.h @@ -78,23 +78,34 @@ typedef cairo_surface_t* NativeDrawingContext; // See comment at the top of the file for usage. typedef intptr_t NativeViewId; -// Convert a NativeViewId to a NativeView. At the moment, we assume that the -// ids are the same as the NativeViews. This is correct on Windows (where -// NativeView == HWND). -// TODO(port): figure out what ids are going to be and implement this function -// This is only to be called in the browser process. +// Convert a NativeViewId to a NativeView. +// On Windows, these are both HWNDS so it's just a cast. +// On Mac, for now, we pass the NSView pointer into the renderer +// On Linux we use an opaque id +#if defined(OS_WIN) || defined(OS_MACOSX) static inline NativeView NativeViewFromId(NativeViewId id) { return reinterpret_cast<NativeView>(id); } +#elif defined(OS_LINUX) +// A NativeView on Linux is a GtkWidget*. However, we can't go directly from an +// X window ID to a GtkWidget. Thus, functions which handle NativeViewIds from +// the renderer have to use Xlib. This is fine since these functions are +// generally performed on the BACKGROUND_X thread which can't use GTK anyway. + +#define NativeViewFromId(x) NATIVE_VIEW_FROM_ID_NOT_AVAILIBLE_ON_LINUX -// Convert a NativeView to a NativeViewId. At the moment, we assume that the -// ids are the same as the NativeViews. This is correct on Windows (where -// NativeView == HWND). -// TODO(port): figure out what ids are going to be and implement this function -// This is only to be called in the browser process. +#endif // defined(OS_LINUX) + +// Convert a NativeView to a NativeViewId. See the comments above +// NativeViewFromId. +#if defined(OS_WIN) || defined(OS_MACOSX) static inline NativeViewId IdFromNativeView(NativeView view) { return reinterpret_cast<NativeViewId>(view); } +#elif defined(OS_LINUX) +// Not inlined because it involves pulling too many headers. +NativeViewId IdFromNativeView(NativeView view); +#endif // defined(OS_LINUX) } // namespace gfx diff --git a/base/gfx/native_widget_types_gtk.cc b/base/gfx/native_widget_types_gtk.cc new file mode 100644 index 0000000..2deb46c --- /dev/null +++ b/base/gfx/native_widget_types_gtk.cc @@ -0,0 +1,16 @@ +// Copyright (c) 2009 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 "base/gfx/native_widget_types.h" + +#include "base/gfx/gtk_native_view_id_manager.h" +#include "base/logging.h" + +namespace gfx { + +NativeViewId IdFromNativeView(NativeView view) { + return Singleton<GtkNativeViewManager>()->GetIdForWidget(view); +} + +} // namespace gfx |