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// 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 "ui/web_dialogs/web_dialog_ui.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/lazy_instance.h"
#include "base/property_bag.h"
#include "base/values.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "content/public/common/bindings_policy.h"
#include "ui/web_dialogs/web_dialog_delegate.h"
using content::RenderViewHost;
using content::WebUIMessageHandler;
static base::LazyInstance<base::PropertyAccessor<ui::WebDialogDelegate*> >
g_web_dialog_ui_property_accessor = LAZY_INSTANCE_INITIALIZER;
namespace ui {
WebDialogUI::WebDialogUI(content::WebUI* web_ui)
: WebUIController(web_ui) {
}
WebDialogUI::~WebDialogUI() {
// Don't unregister our property. During the teardown of the WebContents,
// this will be deleted, but the WebContents will already be destroyed.
//
// This object is owned indirectly by the WebContents. WebUIs can change, so
// it's scary if this WebUI is changed out and replaced with something else,
// since the property will still point to the old delegate. But the delegate
// is itself the owner of the WebContents for a dialog so will be in scope,
// and the HTML dialogs won't swap WebUIs anyway since they don't navigate.
}
void WebDialogUI::CloseDialog(const base::ListValue* args) {
OnDialogClosed(args);
}
// static
base::PropertyAccessor<WebDialogDelegate*>& WebDialogUI::GetPropertyAccessor() {
return g_web_dialog_ui_property_accessor.Get();
}
////////////////////////////////////////////////////////////////////////////////
// Private:
void WebDialogUI::RenderViewCreated(RenderViewHost* render_view_host) {
// Hook up the javascript function calls, also known as chrome.send("foo")
// calls in the HTML, to the actual C++ functions.
web_ui()->RegisterMessageCallback("DialogClose",
base::Bind(&WebDialogUI::OnDialogClosed, base::Unretained(this)));
// Pass the arguments to the renderer supplied by the delegate.
std::string dialog_args;
std::vector<WebUIMessageHandler*> handlers;
WebDialogDelegate** delegate = GetPropertyAccessor().GetProperty(
web_ui()->GetWebContents()->GetPropertyBag());
if (delegate) {
dialog_args = (*delegate)->GetDialogArgs();
(*delegate)->GetWebUIMessageHandlers(&handlers);
}
if (0 != (web_ui()->GetBindings() & content::BINDINGS_POLICY_WEB_UI))
render_view_host->SetWebUIProperty("dialogArguments", dialog_args);
for (std::vector<WebUIMessageHandler*>::iterator it = handlers.begin();
it != handlers.end(); ++it) {
web_ui()->AddMessageHandler(*it);
}
if (delegate)
(*delegate)->OnDialogShown(web_ui(), render_view_host);
}
void WebDialogUI::OnDialogClosed(const ListValue* args) {
WebDialogDelegate** delegate = GetPropertyAccessor().GetProperty(
web_ui()->GetWebContents()->GetPropertyBag());
if (delegate) {
std::string json_retval;
if (args && !args->empty() && !args->GetString(0, &json_retval))
NOTREACHED() << "Could not read JSON argument";
(*delegate)->OnDialogClosed(json_retval);
}
}
ExternalWebDialogUI::ExternalWebDialogUI(content::WebUI* web_ui)
: WebDialogUI(web_ui) {
// Non-file based UI needs to not have access to the Web UI bindings
// for security reasons. The code hosting the dialog should provide
// dialog specific functionality through other bindings and methods
// that are scoped in duration to the dialogs existence.
web_ui->SetBindings(web_ui->GetBindings() & ~content::BINDINGS_POLICY_WEB_UI);
}
ExternalWebDialogUI::~ExternalWebDialogUI() {
}
} // namespace ui
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