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// Copyright (c) 2011 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 "chrome/browser/speech/speech_input_extension_notification.h"
#include "base/lazy_instance.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/status_icons/status_icon.h"
#include "chrome/browser/status_icons/status_tray.h"
#include "chrome/common/extensions/extension.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas_skia.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/skbitmap_operations.h"
namespace {
// Number of volume steps used when rendering the VU meter icon.
const int kVolumeSteps = 6;
// A lazily initialized singleton to hold all the images used by the
// notification icon and safely destroy them on exit.
class NotificationTrayImages {
public:
SkBitmap* mic_full() { return mic_full_; }
SkBitmap* mic_empty() { return mic_empty_; }
SkBitmap* balloon_icon() { return balloon_icon_; }
private:
// Private constructor to enforce singleton.
friend struct base::DefaultLazyInstanceTraits<NotificationTrayImages>;
NotificationTrayImages();
// These bitmaps are owned by ResourceBundle and need not be destroyed.
SkBitmap* mic_full_; // Tray mic image with full volume.
SkBitmap* mic_empty_; // Tray mic image with zero volume.
SkBitmap* balloon_icon_; // High resolution mic for the notification balloon.
};
NotificationTrayImages::NotificationTrayImages() {
mic_empty_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
IDR_SPEECH_INPUT_TRAY_MIC_EMPTY);
mic_full_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
IDR_SPEECH_INPUT_TRAY_MIC_FULL);
balloon_icon_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
IDR_SPEECH_INPUT_TRAY_BALLOON_ICON);
}
base::LazyInstance<NotificationTrayImages> g_images = LAZY_INSTANCE_INITIALIZER;
} // namespace
SpeechInputExtensionNotification::SpeechInputExtensionNotification(
Profile* profile)
: profile_(profile),
tray_icon_(NULL) {
mic_image_.reset(new SkBitmap());
mic_image_->setConfig(SkBitmap::kARGB_8888_Config,
g_images.Get().mic_empty()->width(),
g_images.Get().mic_empty()->height());
mic_image_->allocPixels();
buffer_image_.reset(new SkBitmap());
buffer_image_->setConfig(SkBitmap::kARGB_8888_Config,
g_images.Get().mic_empty()->width(),
g_images.Get().mic_empty()->height());
buffer_image_->allocPixels();
}
SpeechInputExtensionNotification::~SpeechInputExtensionNotification() {
Hide();
}
void SpeechInputExtensionNotification::DrawVolume(
SkCanvas* canvas,
const SkBitmap& bitmap,
float volume) {
buffer_image_->eraseARGB(0, 0, 0, 0);
int width = mic_image_->width();
int height = mic_image_->height();
SkCanvas buffer_canvas(*buffer_image_);
SkScalar clip_top =
(((1.0f - volume) * (height * (kVolumeSteps + 1))) - height) /
kVolumeSteps;
buffer_canvas.clipRect(SkRect::MakeLTRB(0, clip_top,
SkIntToScalar(width), SkIntToScalar(height)));
buffer_canvas.drawBitmap(bitmap, 0, 0);
canvas->drawBitmap(*buffer_image_.get(), 0, 0);
}
void SpeechInputExtensionNotification::SetVUMeterVolume(float volume) {
if (!tray_icon_)
return;
mic_image_->eraseARGB(0, 0, 0, 0);
SkCanvas canvas(*mic_image_);
// Draw the empty volume image first and the current volume image on top.
canvas.drawBitmap(*g_images.Get().mic_empty(), 0, 0);
DrawVolume(&canvas, *g_images.Get().mic_full(), volume);
tray_icon_->SetImage(*mic_image_.get());
}
void SpeechInputExtensionNotification::Show(const Extension* extension,
bool show_balloon) {
if (StatusTray* status_tray = g_browser_process->status_tray()) {
DCHECK(!tray_icon_);
tray_icon_ = status_tray->CreateStatusIcon();
DCHECK(tray_icon_);
VLOG(1) << "Tray icon added.";
SetVUMeterVolume(0.0f);
tray_icon_->SetToolTip(l10n_util::GetStringFUTF16(
IDS_SPEECH_INPUT_TRAY_TOOLTIP,
UTF8ToUTF16(extension->name()),
l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
} else {
VLOG(1) << "This platform doesn't support notification icons.";
return;
}
if (show_balloon)
ShowNotificationBalloon(extension);
}
void SpeechInputExtensionNotification::Hide() {
if (!tray_icon_)
return;
if (StatusTray* status_tray = g_browser_process->status_tray()) {
status_tray->RemoveStatusIcon(tray_icon_);
tray_icon_ = NULL;
VLOG(1) << "Tray icon removed.";
}
}
void SpeechInputExtensionNotification::ShowNotificationBalloon(
const Extension* extension) {
string16 title = l10n_util::GetStringUTF16(
IDS_SPEECH_INPUT_TRAY_BALLOON_TITLE);
string16 message = l10n_util::GetStringFUTF16(
IDS_SPEECH_INPUT_TRAY_BALLOON_BODY,
UTF8ToUTF16(extension->name()),
l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
tray_icon_->DisplayBalloon(*g_images.Get().balloon_icon(), title, message);
}
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