cef/libcef/browser/menu_creator.cc

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// Copyright (c) 2012 The Chromium Embedded Framework 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 "libcef/browser/menu_creator.h"
#include "libcef/browser/browser_host_impl.h"
#include "libcef/browser/context_menu_params_impl.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/common/content_client.h"
#include "grit/cef_strings.h"
#if defined(OS_WIN)
#include "libcef/browser/menu_creator_runner_win.h"
#elif defined(OS_MACOSX)
#include "libcef/browser/menu_creator_runner_mac.h"
#elif defined(TOOLKIT_GTK)
#include "libcef/browser/menu_creator_runner_gtk.h"
#endif
namespace {
CefString GetLabel(int message_id) {
string16 label = content::GetContentClient()->GetLocalizedString(message_id);
DCHECK(!label.empty());
return label;
}
} // namespace
CefMenuCreator::CefMenuCreator(CefBrowserHostImpl* browser)
: browser_(browser) {
model_ = new CefMenuModelImpl(this);
}
CefMenuCreator::~CefMenuCreator() {
// The model may outlive the delegate if the context menu is visible when the
// application is closed.
model_->set_delegate(NULL);
}
bool CefMenuCreator::IsShowingContextMenu() {
content::WebContents* web_contents = browser_->GetWebContents();
if (!web_contents)
return false;
content::RenderWidgetHostView* view = web_contents->GetRenderWidgetHostView();
return (view && view->IsShowingContextMenu());
}
bool CefMenuCreator::CreateContextMenu(
const content::ContextMenuParams& params) {
if (!CreateRunner())
return true;
// The renderer may send the "show context menu" message multiple times, one
// for each right click mouse event it receives. Normally, this doesn't happen
// because mouse events are not forwarded once the context menu is showing.
// However, there's a race - the context menu may not yet be showing when
// the second mouse event arrives. In this case, |HandleContextMenu()| will
// get called multiple times - if so, don't create another context menu.
// TODO(asvitkine): Fix the renderer so that it doesn't do this.
if (IsShowingContextMenu())
return true;
params_ = params;
model_->Clear();
// Create the default menu model.
CreateDefaultModel();
// Give the client a chance to modify the model.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefContextMenuHandler> handler =
client->GetContextMenuHandler();
if (handler.get()) {
CefRefPtr<CefFrame> frame;
if (params_.frame_id > 0)
frame = browser_->GetFrame(params_.frame_id);
if (!frame.get())
frame = browser_->GetMainFrame();
CefRefPtr<CefContextMenuParamsImpl> paramsPtr(
new CefContextMenuParamsImpl(&params_));
handler->OnBeforeContextMenu(browser_, frame, paramsPtr.get(),
model_.get());
// Do not keep references to the parameters in the callback.
paramsPtr->Detach(NULL);
DCHECK_EQ(paramsPtr->GetRefCt(), 1);
DCHECK(model_->VerifyRefCount());
// Menu is empty so notify the client and return.
if (model_->GetCount() == 0) {
MenuClosed(model_);
return true;
}
}
}
return runner_->RunContextMenu(this);
}
bool CefMenuCreator::CreateRunner() {
if (!runner_.get()) {
// Create the menu runner.
#if defined(OS_WIN)
runner_.reset(new CefMenuCreatorRunnerWin);
#elif defined(OS_MACOSX)
runner_.reset(new CefMenuCreatorRunnerMac);
#elif defined(TOOLKIT_GTK)
runner_.reset(new CefMenuCreatorRunnerGtk);
#else
// Need an implementation.
NOTREACHED();
#endif
}
return (runner_.get() != NULL);
}
void CefMenuCreator::ExecuteCommand(CefRefPtr<CefMenuModelImpl> source,
int command_id,
cef_event_flags_t event_flags) {
// Give the client a chance to handle the command.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefContextMenuHandler> handler =
client->GetContextMenuHandler();
if (handler.get()) {
CefRefPtr<CefFrame> frame;
if (params_.frame_id > 0)
frame = browser_->GetFrame(params_.frame_id);
if (!frame.get())
frame = browser_->GetMainFrame();
CefRefPtr<CefContextMenuParamsImpl> paramsPtr(
new CefContextMenuParamsImpl(&params_));
bool handled = handler->OnContextMenuCommand(browser_, frame,
paramsPtr.get(), command_id, event_flags);
// Do not keep references to the parameters in the callback.
paramsPtr->Detach(NULL);
DCHECK_EQ(paramsPtr->GetRefCt(), 1);
if (handled)
return;
}
}
// Execute the default command handling.
ExecuteDefaultCommand(command_id);
}
void CefMenuCreator::MenuWillShow(CefRefPtr<CefMenuModelImpl> source) {
// May be called for sub-menus as well.
if (source.get() != model_.get())
return;
content::WebContents* web_contents = browser_->GetWebContents();
if (!web_contents)
return;
// Notify the host before showing the context menu.
content::RenderWidgetHostView* view = web_contents->GetRenderWidgetHostView();
if (view)
view->SetShowingContextMenu(true);
}
void CefMenuCreator::MenuClosed(CefRefPtr<CefMenuModelImpl> source) {
// May be called for sub-menus as well.
if (source.get() != model_.get())
return;
// Notify the client.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefContextMenuHandler> handler =
client->GetContextMenuHandler();
if (handler.get()) {
CefRefPtr<CefFrame> frame;
if (params_.frame_id > 0)
frame = browser_->GetFrame(params_.frame_id);
if (!frame.get())
frame = browser_->GetMainFrame();
handler->OnContextMenuDismissed(browser_, frame);
}
}
if (IsShowingContextMenu()) {
// Notify the host after closing the context menu.
content::RenderWidgetHostView* view =
browser_->GetWebContents()->GetRenderWidgetHostView();
if (view)
view->SetShowingContextMenu(false);
content::RenderViewHost* rvh =
browser_->GetWebContents()->GetRenderViewHost();
if (rvh)
rvh->NotifyContextMenuClosed(params_.custom_context);
}
}
void CefMenuCreator::CreateDefaultModel() {
if (params_.is_editable) {
// Editable node.
model_->AddItem(MENU_ID_UNDO, GetLabel(IDS_MENU_UNDO));
model_->AddItem(MENU_ID_REDO, GetLabel(IDS_MENU_REDO));
model_->AddSeparator();
model_->AddItem(MENU_ID_CUT, GetLabel(IDS_MENU_CUT));
model_->AddItem(MENU_ID_COPY, GetLabel(IDS_MENU_COPY));
model_->AddItem(MENU_ID_PASTE, GetLabel(IDS_MENU_PASTE));
model_->AddItem(MENU_ID_DELETE, GetLabel(IDS_MENU_DELETE));
model_->AddSeparator();
model_->AddItem(MENU_ID_SELECT_ALL, GetLabel(IDS_MENU_SELECT_ALL));
if (!(params_.edit_flags & CM_EDITFLAG_CAN_UNDO))
model_->SetEnabled(MENU_ID_UNDO, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_REDO))
model_->SetEnabled(MENU_ID_REDO, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_CUT))
model_->SetEnabled(MENU_ID_CUT, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_COPY))
model_->SetEnabled(MENU_ID_COPY, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_PASTE))
model_->SetEnabled(MENU_ID_PASTE, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_DELETE))
model_->SetEnabled(MENU_ID_DELETE, false);
if (!(params_.edit_flags & CM_EDITFLAG_CAN_SELECT_ALL))
model_->SetEnabled(MENU_ID_SELECT_ALL, false);
} else if (!params_.selection_text.empty()) {
// Something is selected.
model_->AddItem(MENU_ID_COPY, GetLabel(IDS_MENU_COPY));
} else if (!params_.page_url.is_empty() || !params_.frame_url.is_empty()) {
// Page or frame.
model_->AddItem(MENU_ID_BACK, GetLabel(IDS_MENU_BACK));
model_->AddItem(MENU_ID_FORWARD, GetLabel(IDS_MENU_FORWARD));
model_->AddSeparator();
model_->AddItem(MENU_ID_PRINT, GetLabel(IDS_MENU_PRINT));
model_->AddItem(MENU_ID_VIEW_SOURCE, GetLabel(IDS_MENU_VIEW_SOURCE));
if (!browser_->CanGoBack())
model_->SetEnabled(MENU_ID_BACK, false);
if (!browser_->CanGoForward())
model_->SetEnabled(MENU_ID_FORWARD, false);
// TODO(cef): Enable once printing is supported.
model_->SetEnabled(MENU_ID_PRINT, false);
}
}
void CefMenuCreator::ExecuteDefaultCommand(int command_id) {
switch (command_id) {
// Navigation.
case MENU_ID_BACK:
browser_->GoBack();
break;
case MENU_ID_FORWARD:
browser_->GoForward();
break;
case MENU_ID_RELOAD:
browser_->Reload();
break;
case MENU_ID_RELOAD_NOCACHE:
browser_->ReloadIgnoreCache();
break;
case MENU_ID_STOPLOAD:
browser_->StopLoad();
break;
// Editing.
case MENU_ID_UNDO:
browser_->GetFocusedFrame()->Undo();
break;
case MENU_ID_REDO:
browser_->GetFocusedFrame()->Redo();
break;
case MENU_ID_CUT:
browser_->GetFocusedFrame()->Cut();
break;
case MENU_ID_COPY:
browser_->GetFocusedFrame()->Copy();
break;
case MENU_ID_PASTE:
browser_->GetFocusedFrame()->Paste();
break;
case MENU_ID_DELETE:
browser_->GetFocusedFrame()->Delete();
break;
case MENU_ID_SELECT_ALL:
browser_->GetFocusedFrame()->SelectAll();
break;
// Miscellaneous.
case MENU_ID_FIND:
// TODO(cef): Implement.
NOTIMPLEMENTED();
break;
case MENU_ID_PRINT:
// TODO(cef): Implement.
NOTIMPLEMENTED();
break;
case MENU_ID_VIEW_SOURCE:
browser_->GetFocusedFrame()->ViewSource();
break;
default:
break;
}
}