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// Copyright 2014 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 "extensions/renderer/programmatic_script_injector.h"
#include <vector>
#include "base/values.h"
#include "content/public/common/url_constants.h"
#include "content/public/renderer/render_view.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/renderer/injection_host.h"
#include "extensions/renderer/script_context.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebScriptSource.h"
namespace extensions {
ProgrammaticScriptInjector::ProgrammaticScriptInjector(
const ExtensionMsg_ExecuteCode_Params& params,
blink::WebFrame* web_frame)
: params_(new ExtensionMsg_ExecuteCode_Params(params)),
url_(ScriptContext::GetDataSourceURLForFrame(web_frame)),
render_view_(content::RenderView::FromWebView(web_frame->view())),
results_(new base::ListValue()),
finished_(false) {
effective_url_ = ScriptContext::GetEffectiveDocumentURL(
web_frame, url_, params.match_about_blank);
}
ProgrammaticScriptInjector::~ProgrammaticScriptInjector() {
}
UserScript::InjectionType ProgrammaticScriptInjector::script_type()
const {
return UserScript::PROGRAMMATIC_SCRIPT;
}
bool ProgrammaticScriptInjector::ShouldExecuteInChildFrames() const {
return params_->all_frames;
}
bool ProgrammaticScriptInjector::ShouldExecuteInMainWorld() const {
return params_->in_main_world;
}
bool ProgrammaticScriptInjector::IsUserGesture() const {
return params_->user_gesture;
}
bool ProgrammaticScriptInjector::ExpectsResults() const {
return params_->wants_result;
}
bool ProgrammaticScriptInjector::ShouldInjectJs(
UserScript::RunLocation run_location) const {
return GetRunLocation() == run_location && params_->is_javascript;
}
bool ProgrammaticScriptInjector::ShouldInjectCss(
UserScript::RunLocation run_location) const {
return GetRunLocation() == run_location && !params_->is_javascript;
}
PermissionsData::AccessType ProgrammaticScriptInjector::CanExecuteOnFrame(
const InjectionHost* injection_host,
blink::WebFrame* frame,
int tab_id,
const GURL& top_url) const {
// It doesn't make sense to inject a script into a remote frame or a frame
// with a null document.
if (frame->isWebRemoteFrame() || frame->document().isNull())
return PermissionsData::ACCESS_DENIED;
GURL effective_document_url = ScriptContext::GetEffectiveDocumentURL(
frame, frame->document().url(), params_->match_about_blank);
if (params_->is_web_view) {
if (frame->parent()) {
// This is a subframe inside <webview>, so allow it.
return PermissionsData::ACCESS_ALLOWED;
}
return effective_document_url == params_->webview_src
? PermissionsData::ACCESS_ALLOWED
: PermissionsData::ACCESS_DENIED;
}
DCHECK_EQ(injection_host->id().type(), HostID::EXTENSIONS);
return injection_host->CanExecuteOnFrame(
effective_document_url, top_url, tab_id, true /* is_declarative */);
}
std::vector<blink::WebScriptSource> ProgrammaticScriptInjector::GetJsSources(
UserScript::RunLocation run_location) const {
DCHECK_EQ(GetRunLocation(), run_location);
DCHECK(params_->is_javascript);
return std::vector<blink::WebScriptSource>(
1,
blink::WebScriptSource(
blink::WebString::fromUTF8(params_->code), params_->file_url));
}
std::vector<std::string> ProgrammaticScriptInjector::GetCssSources(
UserScript::RunLocation run_location) const {
DCHECK_EQ(GetRunLocation(), run_location);
DCHECK(!params_->is_javascript);
return std::vector<std::string>(1, params_->code);
}
void ProgrammaticScriptInjector::GetRunInfo(
ScriptsRunInfo* scripts_run_info,
UserScript::RunLocation run_location) const {
}
void ProgrammaticScriptInjector::OnInjectionComplete(
scoped_ptr<base::ListValue> execution_results,
UserScript::RunLocation run_location) {
results_ = execution_results.Pass();
Finish(std::string());
}
void ProgrammaticScriptInjector::OnWillNotInject(InjectFailureReason reason) {
std::string error;
switch (reason) {
case NOT_ALLOWED:
if (url_.SchemeIs(url::kAboutScheme)) {
error = ErrorUtils::FormatErrorMessage(
manifest_errors::kCannotAccessAboutUrl, url_.spec(),
effective_url_.GetOrigin().spec());
} else {
error = ErrorUtils::FormatErrorMessage(
manifest_errors::kCannotAccessPage, url_.spec());
}
break;
case EXTENSION_REMOVED: // no special error here.
case WONT_INJECT:
break;
}
Finish(error);
}
UserScript::RunLocation ProgrammaticScriptInjector::GetRunLocation() const {
return static_cast<UserScript::RunLocation>(params_->run_at);
}
void ProgrammaticScriptInjector::Finish(const std::string& error) {
DCHECK(!finished_);
finished_ = true;
render_view_->Send(new ExtensionHostMsg_ExecuteCodeFinished(
render_view_->GetRoutingID(),
params_->request_id,
error,
url_,
*results_));
}
} // namespace extensions
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