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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "kjs_proxy.h"
#include "Chrome.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "GCController.h"
#include "JSDocument.h"
#include "JSDOMWindow.h"
#include "Page.h"
#include "Settings.h"
#include "kjs_events.h"
#include "kjs_window.h"
#if ENABLE(SVG)
#include "JSSVGLazyEventListener.h"
#endif
using namespace KJS;
using namespace WebCore::EventNames;
namespace WebCore {
KJSProxy::KJSProxy(Frame* frame)
: m_frame(frame)
, m_handlerLineno(0)
, m_processingTimerCallback(0)
, m_processingInlineCode(0)
{
}
KJSProxy::~KJSProxy()
{
if (m_globalObject) {
m_globalObject = 0;
// It's likely that releasing the global object has created a lot of garbage.
gcController().garbageCollectSoon();
}
}
JSValue* KJSProxy::evaluate(const String& filename, int baseLine, const String& str)
{
// evaluate code. Returns the JS return value or 0
// if there was none, an error occured or the type couldn't be converted.
initScriptIfNeeded();
// inlineCode is true for <a href="javascript:doSomething()">
// and false for <script>doSomething()</script>. Check if it has the
// expected value in all cases.
// See smart window.open policy for where this is used.
ExecState* exec = m_globalObject->globalExec();
m_processingInlineCode = filename.isNull();
JSLock lock;
// Evaluating the JavaScript could cause the frame to be deallocated
// so we start the keep alive timer here.
m_frame->keepAlive();
JSValue* thisNode = Window::retrieve(m_frame);
m_globalObject->startTimeoutCheck();
Completion comp = Interpreter::evaluate(exec, filename, baseLine, reinterpret_cast<const KJS::UChar*>(str.characters()), str.length(), thisNode);
m_globalObject->stopTimeoutCheck();
if (comp.complType() == Normal || comp.complType() == ReturnValue) {
m_processingInlineCode = false;
return comp.value();
}
if (comp.complType() == Throw) {
UString errorMessage = comp.value()->toString(exec);
int lineNumber = comp.value()->toObject(exec)->get(exec, "line")->toInt32(exec);
UString sourceURL = comp.value()->toObject(exec)->get(exec, "sourceURL")->toString(exec);
if (Page* page = m_frame->page())
page->chrome()->addMessageToConsole(JSMessageSource, ErrorMessageLevel, errorMessage, lineNumber, sourceURL);
}
m_processingInlineCode = false;
return 0;
}
void KJSProxy::clear()
{
// clear resources allocated by the global object, and make it ready to be used by another page
// We have to keep it, so that the Window object for the frame remains the same.
// (we used to delete and re-create it, previously)
if (m_globalObject)
m_globalObject->clear();
}
EventListener* KJSProxy::createHTMLEventHandler(const String& functionName, const String& code, Node* node)
{
initScriptIfNeeded();
JSLock lock;
return new JSLazyEventListener(functionName, code, Window::retrieveWindow(m_frame), node, m_handlerLineno);
}
#if ENABLE(SVG)
EventListener* KJSProxy::createSVGEventHandler(const String& functionName, const String& code, Node* node)
{
initScriptIfNeeded();
JSLock lock;
return new JSSVGLazyEventListener(functionName, code, Window::retrieveWindow(m_frame), node, m_handlerLineno);
}
#endif
void KJSProxy::finishedWithEvent(Event* event)
{
// This is called when the DOM implementation has finished with a particular event. This
// is the case in sitations where an event has been created just for temporary usage,
// e.g. an image load or mouse move. Once the event has been dispatched, it is forgotten
// by the DOM implementation and so does not need to be cached still by the interpreter
ScriptInterpreter::forgetDOMObject(event);
}
void KJSProxy::initScript()
{
if (m_globalObject)
return;
JSLock lock;
m_globalObject = new JSDOMWindow(m_frame->domWindow());
m_frame->loader()->dispatchWindowObjectAvailable();
}
void KJSProxy::clearDocumentWrapper()
{
if (!m_globalObject)
return;
JSLock lock;
m_globalObject->removeDirect("document");
}
bool KJSProxy::processingUserGesture() const
{
if (!m_globalObject)
return false;
if (Event* event = m_globalObject->currentEvent()) {
const AtomicString& type = event->type();
if ( // mouse events
type == clickEvent || type == mousedownEvent ||
type == mouseupEvent || type == dblclickEvent ||
// keyboard events
type == keydownEvent || type == keypressEvent ||
type == keyupEvent ||
// other accepted events
type == selectEvent || type == changeEvent ||
type == focusEvent || type == blurEvent ||
type == submitEvent)
return true;
} else { // no event
if (m_processingInlineCode && !m_processingTimerCallback) {
// This is the <a href="javascript:window.open('...')> case -> we let it through
return true;
}
// This is the <script>window.open(...)</script> case or a timer callback -> block it
}
return false;
}
bool KJSProxy::isEnabled()
{
Settings* settings = m_frame->settings();
return (settings && settings->isJavaScriptEnabled());
}
} // namespace WebCore
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