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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 "content/renderer/favicon_helper.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/message_loop.h"
#include "content/common/icon_messages.h"
#include "content/public/renderer/render_view.h"
#include "net/base/data_url.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebURLRequest.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebVector.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/base/ui_base_switches.h"
#include "ui/gfx/favicon_size.h"
#include "ui/gfx/size.h"
#include "ui/gfx/skbitmap_operations.h"
#include "webkit/glue/image_decoder.h"
#include "webkit/glue/multi_resolution_image_resource_fetcher.h"
#include "webkit/glue/webkit_glue.h"
using WebKit::WebFrame;
using WebKit::WebIconURL;
using WebKit::WebVector;
using WebKit::WebURL;
using WebKit::WebURLRequest;
using webkit_glue::MultiResolutionImageResourceFetcher;
namespace content {
namespace {
bool TouchEnabled() {
// Based on the definition of chrome::kEnableTouchIcon.
#if defined(OS_ANDROID)
return true;
#else
return false;
#endif
}
} // namespace
static FaviconURL::IconType ToFaviconType(WebIconURL::Type type) {
switch (type) {
case WebIconURL::TypeFavicon:
return FaviconURL::FAVICON;
case WebIconURL::TypeTouch:
return FaviconURL::TOUCH_ICON;
case WebIconURL::TypeTouchPrecomposed:
return FaviconURL::TOUCH_PRECOMPOSED_ICON;
case WebIconURL::TypeInvalid:
return FaviconURL::INVALID_ICON;
}
return FaviconURL::INVALID_ICON;
}
FaviconHelper::FaviconHelper(RenderView* render_view)
: RenderViewObserver(render_view),
icon_types_changed_(WebIconURL::TypeInvalid),
ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
}
void FaviconHelper::DidChangeIcon(WebKit::WebFrame* frame,
WebKit::WebIconURL::Type icon_type) {
if (frame->parent())
return;
if (!TouchEnabled() && icon_type != WebIconURL::TypeFavicon)
return;
DCHECK(!render_view()->GetWebView() ||
frame == render_view()->GetWebView()->mainFrame());
weak_ptr_factory_.InvalidateWeakPtrs();
icon_types_changed_ =
static_cast<WebKit::WebIconURL::Type>(icon_types_changed_ | icon_type);
MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(&FaviconHelper::ProcessDidChangeIcon,
weak_ptr_factory_.GetWeakPtr()));
}
FaviconHelper::~FaviconHelper() {
}
void FaviconHelper::ProcessDidChangeIcon() {
WebKit::WebIconURL::Type icon_types = icon_types_changed_;
icon_types_changed_ = WebIconURL::TypeInvalid;
WebKit::WebView* web_view = render_view()->GetWebView();
if (!web_view) {
return;
}
WebFrame* frame = web_view->mainFrame();
if (!frame) {
return;
}
WebVector<WebIconURL> icon_urls = frame->iconURLs(icon_types);
std::vector<FaviconURL> urls;
for (size_t i = 0; i < icon_urls.size(); i++) {
urls.push_back(FaviconURL(icon_urls[i].iconURL(),
ToFaviconType(icon_urls[i].iconType())));
}
SendUpdateFaviconURL(routing_id(), render_view()->GetPageId(), urls);
}
void FaviconHelper::OnDownloadFavicon(int id,
const GURL& image_url,
bool is_favicon,
int image_size) {
std::vector<SkBitmap> result_images;
if (image_url.SchemeIs("data")) {
SkBitmap data_image = ImageFromDataUrl(image_url);
if (!data_image.empty())
result_images.push_back(data_image);
} else {
if (DownloadFavicon(id, image_url, is_favicon, image_size)) {
// Will complete asynchronously via FaviconHelper::DidDownloadFavicon
return;
}
}
Send(new IconHostMsg_DidDownloadFavicon(routing_id(),
id,
image_url,
image_size,
result_images));
}
bool FaviconHelper::DownloadFavicon(int id,
const GURL& image_url,
bool is_favicon,
int image_size) {
// Make sure webview was not shut down.
if (!render_view()->GetWebView())
return false;
// Create an image resource fetcher and assign it with a call back object.
image_fetchers_.push_back(new MultiResolutionImageResourceFetcher(
image_url,
render_view()->GetWebView()->mainFrame(),
id,
is_favicon ? WebURLRequest::TargetIsFavicon :
WebURLRequest::TargetIsImage,
base::Bind(&FaviconHelper::DidDownloadFavicon,
base::Unretained(this), image_size)));
return true;
}
void FaviconHelper::DidDownloadFavicon(
int requested_size,
MultiResolutionImageResourceFetcher* fetcher,
const std::vector<SkBitmap>& images) {
// Notify requester of image download status.
Send(new IconHostMsg_DidDownloadFavicon(routing_id(),
fetcher->id(),
fetcher->image_url(),
requested_size,
images));
// Remove the image fetcher from our pending list. We're in the callback from
// MultiResolutionImageResourceFetcher, best to delay deletion.
ImageResourceFetcherList::iterator iter =
std::find(image_fetchers_.begin(), image_fetchers_.end(), fetcher);
if (iter != image_fetchers_.end()) {
image_fetchers_.weak_erase(iter);
MessageLoop::current()->DeleteSoon(FROM_HERE, fetcher);
}
}
SkBitmap FaviconHelper::ImageFromDataUrl(const GURL& url) const {
std::string mime_type, char_set, data;
if (net::DataURL::Parse(url, &mime_type, &char_set, &data) && !data.empty()) {
// Decode the favicon using WebKit's image decoder.
webkit_glue::ImageDecoder decoder(
gfx::Size(gfx::kFaviconSize, gfx::kFaviconSize));
const unsigned char* src_data =
reinterpret_cast<const unsigned char*>(&data[0]);
return decoder.Decode(src_data, data.size());
}
return SkBitmap();
}
void FaviconHelper::SendUpdateFaviconURL(int32 routing_id,
int32 page_id,
const std::vector<FaviconURL>& urls) {
if (!urls.empty())
Send(new IconHostMsg_UpdateFaviconURL(routing_id, page_id, urls));
}
bool FaviconHelper::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(FaviconHelper, message)
IPC_MESSAGE_HANDLER(IconMsg_DownloadFavicon, OnDownloadFavicon)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void FaviconHelper::DidStopLoading() {
int icon_types = WebIconURL::TypeFavicon;
if (TouchEnabled())
icon_types |= WebIconURL::TypeTouchPrecomposed | WebIconURL::TypeTouch;
WebVector<WebIconURL> icon_urls =
render_view()->GetWebView()->mainFrame()->iconURLs(icon_types);
std::vector<FaviconURL> urls;
for (size_t i = 0; i < icon_urls.size(); i++) {
WebURL url = icon_urls[i].iconURL();
if (!url.isEmpty())
urls.push_back(FaviconURL(url, ToFaviconType(icon_urls[i].iconType())));
}
SendUpdateFaviconURL(routing_id(), render_view()->GetPageId(), urls);
}
} // namespace content
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