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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 "ash/content/keyboard_overlay/keyboard_overlay_delegate.h"
#include <algorithm>
#include "ash/shell.h"
#include "base/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/gfx/screen.h"
#include "ui/views/controls/webview/web_dialog_view.h"
#include "ui/views/widget/widget.h"
using content::WebContents;
using content::WebUIMessageHandler;
namespace {
const int kBaseWidth = 1252;
const int kBaseHeight = 516;
const int kHorizontalMargin = 28;
// A message handler for detecting the timing when the web contents is painted.
class PaintMessageHandler : public WebUIMessageHandler,
public base::SupportsWeakPtr<PaintMessageHandler> {
public:
explicit PaintMessageHandler(views::Widget* widget) : widget_(widget) {}
~PaintMessageHandler() override {}
// WebUIMessageHandler implementation.
void RegisterMessages() override;
private:
void DidPaint(const base::ListValue* args);
views::Widget* widget_;
DISALLOW_COPY_AND_ASSIGN(PaintMessageHandler);
};
void PaintMessageHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
"didPaint", base::Bind(&PaintMessageHandler::DidPaint, AsWeakPtr()));
}
void PaintMessageHandler::DidPaint(const base::ListValue* args) {
// Show the widget after the web content has been painted.
widget_->Show();
}
} // namespace
namespace ash {
KeyboardOverlayDelegate::KeyboardOverlayDelegate(const base::string16& title,
const GURL& url)
: title_(title), url_(url), widget_(NULL) {}
KeyboardOverlayDelegate::~KeyboardOverlayDelegate() {}
views::Widget* KeyboardOverlayDelegate::Show(views::WebDialogView* view) {
widget_ = new views::Widget;
views::Widget::InitParams params(
views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
params.context = Shell::GetPrimaryRootWindow();
params.delegate = view;
widget_->Init(params);
// Show the widget at the bottom of the work area.
gfx::Size size;
GetDialogSize(&size);
const gfx::Rect& rect =
Shell::GetScreen()
->GetDisplayNearestWindow(widget_->GetNativeView())
.work_area();
gfx::Rect bounds(rect.x() + (rect.width() - size.width()) / 2,
rect.bottom() - size.height(), size.width(), size.height());
widget_->SetBounds(bounds);
// The widget will be shown when the web contents gets ready to display.
return widget_;
}
ui::ModalType KeyboardOverlayDelegate::GetDialogModalType() const {
return ui::MODAL_TYPE_SYSTEM;
}
base::string16 KeyboardOverlayDelegate::GetDialogTitle() const {
return title_;
}
GURL KeyboardOverlayDelegate::GetDialogContentURL() const {
return url_;
}
void KeyboardOverlayDelegate::GetWebUIMessageHandlers(
std::vector<WebUIMessageHandler*>* handlers) const {
handlers->push_back(new PaintMessageHandler(widget_));
}
void KeyboardOverlayDelegate::GetDialogSize(gfx::Size* size) const {
using std::min;
DCHECK(widget_);
gfx::Rect rect = ash::Shell::GetScreen()
->GetDisplayNearestWindow(widget_->GetNativeView())
.work_area();
const int width = min(kBaseWidth, rect.width() - kHorizontalMargin);
const int height = width * kBaseHeight / kBaseWidth;
size->SetSize(width, height);
}
std::string KeyboardOverlayDelegate::GetDialogArgs() const {
return "[]";
}
void KeyboardOverlayDelegate::OnDialogClosed(const std::string& json_retval) {
delete this;
return;
}
void KeyboardOverlayDelegate::OnCloseContents(WebContents* source,
bool* out_close_dialog) {}
bool KeyboardOverlayDelegate::ShouldShowDialogTitle() const {
return false;
}
bool KeyboardOverlayDelegate::HandleContextMenu(
const content::ContextMenuParams& params) {
return true;
}
} // namespace ash
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