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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/renderer/plugins/plugin_placeholder.h"
#include "base/string_util.h"
#include "chrome/renderer/plugins/plugin_uma.h"
#include "content/public/renderer/render_view.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebData.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebRegularExpression.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCaseSensitivity.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
using WebKit::WebElement;
using WebKit::WebFrame;
using WebKit::WebMouseEvent;
using WebKit::WebNode;
using WebKit::WebPlugin;
using WebKit::WebPluginContainer;
using WebKit::WebPluginParams;
using WebKit::WebRegularExpression;
using WebKit::WebString;
using webkit::WebPluginInfo;
using webkit::WebViewPlugin;
static const char* const kPluginPlaceholderDataURL =
"chrome://pluginplaceholderdata/";
PluginPlaceholder::PluginPlaceholder(content::RenderView* render_view,
WebFrame* frame,
const WebPluginParams& params,
const std::string& html_data)
: content::RenderViewObserver(render_view),
frame_(frame),
plugin_params_(params),
plugin_(WebViewPlugin::Create(
this, render_view->GetWebkitPreferences(), html_data,
GURL(kPluginPlaceholderDataURL))) {
}
PluginPlaceholder::~PluginPlaceholder() {
}
void PluginPlaceholder::BindWebFrame(WebFrame* frame) {
BindToJavascript(frame, "plugin");
}
void PluginPlaceholder::LoadPluginInternal(const WebPluginInfo& plugin_info) {
CHECK(plugin_);
WebPluginContainer* container = plugin_->container();
WebPlugin* new_plugin =
render_view()->CreatePlugin(frame_, plugin_info, plugin_params_);
if (new_plugin && new_plugin->initialize(container)) {
plugin_->RestoreTitleText();
container->setPlugin(new_plugin);
container->invalidate();
container->reportGeometry();
plugin_->ReplayReceivedData(new_plugin);
plugin_->destroy();
} else {
MissingPluginReporter::GetInstance()->ReportPluginMissing(
plugin_params_.mimeType.utf8(),
plugin_params_.url);
}
}
void PluginPlaceholder::HidePluginInternal() {
WebPluginContainer* container = plugin_->container();
WebElement element = container->element();
element.setAttribute("style", "display: none;");
// If we have a width and height, search for a parent (often <div>) with the
// same dimensions. If we find such a parent, hide that as well.
// This makes much more uncovered page content usable (including clickable)
// as opposed to merely visible.
// TODO(cevans) -- it's a foul heurisitc but we're going to tolerate it for
// now for these reasons:
// 1) Makes the user experience better.
// 2) Foulness is encapsulated within this single function.
// 3) Confidence in no fasle positives.
// 4) Seems to have a good / low false negative rate at this time.
if (element.hasAttribute("width") && element.hasAttribute("height")) {
std::string width_str("width:[\\s]*");
width_str += element.getAttribute("width").utf8().data();
if (EndsWith(width_str, "px", false)) {
width_str = width_str.substr(0, width_str.length() - 2);
}
TrimWhitespace(width_str, TRIM_TRAILING, &width_str);
width_str += "[\\s]*px";
WebRegularExpression width_regex(WebString::fromUTF8(width_str.c_str()),
WebKit::WebTextCaseSensitive);
std::string height_str("height:[\\s]*");
height_str += element.getAttribute("height").utf8().data();
if (EndsWith(height_str, "px", false)) {
height_str = height_str.substr(0, height_str.length() - 2);
}
TrimWhitespace(height_str, TRIM_TRAILING, &height_str);
height_str += "[\\s]*px";
WebRegularExpression height_regex(WebString::fromUTF8(height_str.c_str()),
WebKit::WebTextCaseSensitive);
WebNode parent = element;
while (!parent.parentNode().isNull()) {
parent = parent.parentNode();
if (!parent.isElementNode())
continue;
element = parent.toConst<WebElement>();
if (element.hasAttribute("style")) {
WebString style_str = element.getAttribute("style");
if (width_regex.match(style_str) >= 0 &&
height_regex.match(style_str) >= 0)
element.setAttribute("style", "display: none;");
}
}
}
}
void PluginPlaceholder::WillDestroyPlugin() {
delete this;
}
void PluginPlaceholder::ShowContextMenu(const WebMouseEvent& event) {
}
void PluginPlaceholder::DidFinishLoading() {
}
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