cef/libcef/renderer/dom_node_impl.cc

486 lines
12 KiB
C++

// Copyright (c) 2012 The Chromium Embedded Framework 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 "libcef/renderer/dom_node_impl.h"
#include "libcef/common/tracker.h"
#include "libcef/renderer/browser_impl.h"
#include "libcef/renderer/dom_document_impl.h"
#include "libcef/renderer/dom_event_impl.h"
#include "libcef/renderer/thread_util.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDOMEvent.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDOMEventListener.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/WebFormControlElement.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputElement.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSelectElement.h"
using WebKit::WebDocument;
using WebKit::WebDOMEvent;
using WebKit::WebDOMEventListener;
using WebKit::WebElement;
using WebKit::WebFrame;
using WebKit::WebFormControlElement;
using WebKit::WebInputElement;
using WebKit::WebNode;
using WebKit::WebSelectElement;
using WebKit::WebString;
namespace {
// Wrapper implementation for WebDOMEventListener.
class CefDOMEventListenerWrapper : public WebDOMEventListener,
public CefTrackNode {
public:
CefDOMEventListenerWrapper(CefBrowserImpl* browser, WebFrame* frame,
CefRefPtr<CefDOMEventListener> listener)
: browser_(browser),
frame_(frame),
listener_(listener) {
// Cause this object to be deleted immediately before the frame is closed.
browser->AddFrameObject(frame->identifier(), this);
}
virtual ~CefDOMEventListenerWrapper() {
CEF_REQUIRE_RT();
}
virtual void handleEvent(const WebDOMEvent& event) {
CefRefPtr<CefDOMDocumentImpl> documentImpl;
CefRefPtr<CefDOMEventImpl> eventImpl;
if (!event.isNull()) {
// Create CefDOMDocumentImpl and CefDOMEventImpl objects that are valid
// only for the scope of this method.
const WebDocument& document = frame_->document();
if (!document.isNull()) {
documentImpl = new CefDOMDocumentImpl(browser_, frame_);
eventImpl = new CefDOMEventImpl(documentImpl, event);
}
}
listener_->HandleEvent(eventImpl.get());
if (eventImpl.get())
eventImpl->Detach();
if (documentImpl.get())
documentImpl->Detach();
}
protected:
CefBrowserImpl* browser_;
WebFrame* frame_;
CefRefPtr<CefDOMEventListener> listener_;
};
} // namespace
CefDOMNodeImpl::CefDOMNodeImpl(CefRefPtr<CefDOMDocumentImpl> document,
const WebKit::WebNode& node)
: document_(document),
node_(node) {
}
CefDOMNodeImpl::~CefDOMNodeImpl() {
CEF_REQUIRE_RT();
if (document_.get() && !node_.isNull()) {
// Remove the node from the document.
document_->RemoveNode(node_);
}
}
CefDOMNodeImpl::Type CefDOMNodeImpl::GetType() {
if (!VerifyContext())
return DOM_NODE_TYPE_UNSUPPORTED;
switch (node_.nodeType()) {
case WebNode::ElementNode:
return DOM_NODE_TYPE_ELEMENT;
case WebNode::AttributeNode:
return DOM_NODE_TYPE_ATTRIBUTE;
case WebNode::TextNode:
return DOM_NODE_TYPE_TEXT;
case WebNode::CDataSectionNode:
return DOM_NODE_TYPE_CDATA_SECTION;
case WebNode::EntityReferenceNode:
return DOM_NODE_TYPE_ENTITY_REFERENCE;
case WebNode::EntityNode:
return DOM_NODE_TYPE_ENTITY;
case WebNode::ProcessingInstructionsNode:
return DOM_NODE_TYPE_PROCESSING_INSTRUCTIONS;
case WebNode::CommentNode:
return DOM_NODE_TYPE_COMMENT;
case WebNode::DocumentNode:
return DOM_NODE_TYPE_DOCUMENT;
case WebNode::DocumentTypeNode:
return DOM_NODE_TYPE_DOCUMENT_TYPE;
case WebNode::DocumentFragmentNode:
return DOM_NODE_TYPE_DOCUMENT_FRAGMENT;
case WebNode::NotationNode:
return DOM_NODE_TYPE_NOTATION;
case WebNode::XPathNamespaceNode:
return DOM_NODE_TYPE_XPATH_NAMESPACE;
default:
return DOM_NODE_TYPE_UNSUPPORTED;
}
}
bool CefDOMNodeImpl::IsText() {
if (!VerifyContext())
return false;
return node_.isTextNode();
}
bool CefDOMNodeImpl::IsElement() {
if (!VerifyContext())
return false;
return node_.isElementNode();
}
// Logic copied from RenderViewImpl::IsEditableNode.
bool CefDOMNodeImpl::IsEditable() {
if (!VerifyContext())
return false;
if (node_.isContentEditable())
return true;
if (node_.isElementNode()) {
const WebElement& element = node_.toConst<WebElement>();
if (element.isTextFormControlElement())
return true;
// Also return true if it has an ARIA role of 'textbox'.
for (unsigned i = 0; i < element.attributeCount(); ++i) {
if (LowerCaseEqualsASCII(element.attributeLocalName(i), "role")) {
if (LowerCaseEqualsASCII(element.attributeValue(i), "textbox"))
return true;
break;
}
}
}
return false;
}
bool CefDOMNodeImpl::IsFormControlElement() {
if (!VerifyContext())
return false;
if (node_.isElementNode()) {
const WebElement& element = node_.toConst<WebElement>();
return element.isFormControlElement();
}
return false;
}
CefString CefDOMNodeImpl::GetFormControlElementType() {
CefString str;
if (!VerifyContext())
return str;
if (node_.isElementNode()) {
const WebElement& element = node_.toConst<WebElement>();
if (element.isFormControlElement()) {
// Retrieve the type from the form control element.
const WebFormControlElement& formElement =
node_.toConst<WebFormControlElement>();
const string16& form_control_type = formElement.formControlType();
str = form_control_type;
}
}
return str;
}
bool CefDOMNodeImpl::IsSame(CefRefPtr<CefDOMNode> that) {
if (!VerifyContext())
return false;
CefDOMNodeImpl* impl = static_cast<CefDOMNodeImpl*>(that.get());
if (!impl || !impl->VerifyContext())
return false;
return node_.equals(impl->node_);
}
CefString CefDOMNodeImpl::GetName() {
CefString str;
if (!VerifyContext())
return str;
const WebString& name = node_.nodeName();
if (!name.isNull())
str = name;
return str;
}
CefString CefDOMNodeImpl::GetValue() {
CefString str;
if (!VerifyContext())
return str;
if (node_.isElementNode()) {
const WebElement& element = node_.toConst<WebElement>();
if (element.isFormControlElement()) {
// Retrieve the value from the form control element.
const WebFormControlElement& formElement =
node_.toConst<WebFormControlElement>();
string16 value;
const string16& form_control_type = formElement.formControlType();
if (form_control_type == ASCIIToUTF16("text")) {
const WebInputElement& input_element =
formElement.toConst<WebInputElement>();
value = input_element.value();
} else if (form_control_type == ASCIIToUTF16("select-one")) {
const WebSelectElement& select_element =
formElement.toConst<WebSelectElement>();
value = select_element.value();
}
TrimWhitespace(value, TRIM_LEADING, &value);
str = value;
}
}
if (str.empty()) {
const WebString& value = node_.nodeValue();
if (!value.isNull())
str = value;
}
return str;
}
bool CefDOMNodeImpl::SetValue(const CefString& value) {
if (!VerifyContext())
return false;
if (node_.isElementNode())
return false;
return node_.setNodeValue(string16(value));
}
CefString CefDOMNodeImpl::GetAsMarkup() {
CefString str;
if (!VerifyContext())
return str;
const WebString& markup = node_.createMarkup();
if (!markup.isNull())
str = markup;
return str;
}
CefRefPtr<CefDOMDocument> CefDOMNodeImpl::GetDocument() {
if (!VerifyContext())
return NULL;
return document_.get();
}
CefRefPtr<CefDOMNode> CefDOMNodeImpl::GetParent() {
if (!VerifyContext())
return NULL;
return document_->GetOrCreateNode(node_.parentNode());
}
CefRefPtr<CefDOMNode> CefDOMNodeImpl::GetPreviousSibling() {
if (!VerifyContext())
return NULL;
return document_->GetOrCreateNode(node_.previousSibling());
}
CefRefPtr<CefDOMNode> CefDOMNodeImpl::GetNextSibling() {
if (!VerifyContext())
return NULL;
return document_->GetOrCreateNode(node_.nextSibling());
}
bool CefDOMNodeImpl::HasChildren() {
if (!VerifyContext())
return false;
return node_.hasChildNodes();
}
CefRefPtr<CefDOMNode> CefDOMNodeImpl::GetFirstChild() {
if (!VerifyContext())
return NULL;
return document_->GetOrCreateNode(node_.firstChild());
}
CefRefPtr<CefDOMNode> CefDOMNodeImpl::GetLastChild() {
if (!VerifyContext())
return NULL;
return document_->GetOrCreateNode(node_.lastChild());
}
void CefDOMNodeImpl::AddEventListener(const CefString& eventType,
CefRefPtr<CefDOMEventListener> listener,
bool useCapture) {
if (!VerifyContext())
return;
node_.addEventListener(string16(eventType),
new CefDOMEventListenerWrapper(document_->GetBrowser(),
document_->GetFrame(), listener),
useCapture);
}
CefString CefDOMNodeImpl::GetElementTagName() {
CefString str;
if (!VerifyContext())
return str;
if (!node_.isElementNode()) {
NOTREACHED();
return str;
}
const WebElement& element = node_.toConst<WebKit::WebElement>();
const WebString& tagname = element.tagName();
if (!tagname.isNull())
str = tagname;
return str;
}
bool CefDOMNodeImpl::HasElementAttributes() {
if (!VerifyContext())
return false;
if (!node_.isElementNode()) {
NOTREACHED();
return false;
}
const WebElement& element = node_.toConst<WebKit::WebElement>();
return (element.attributeCount() > 0);
}
bool CefDOMNodeImpl::HasElementAttribute(const CefString& attrName) {
if (!VerifyContext())
return false;
if (!node_.isElementNode()) {
NOTREACHED();
return false;
}
const WebElement& element = node_.toConst<WebKit::WebElement>();
return element.hasAttribute(string16(attrName));
}
CefString CefDOMNodeImpl::GetElementAttribute(const CefString& attrName) {
CefString str;
if (!VerifyContext())
return str;
if (!node_.isElementNode()) {
NOTREACHED();
return str;
}
const WebElement& element = node_.toConst<WebKit::WebElement>();
const WebString& attr = element.getAttribute(string16(attrName));
if (!attr.isNull())
str = attr;
return str;
}
void CefDOMNodeImpl::GetElementAttributes(AttributeMap& attrMap) {
if (!VerifyContext())
return;
if (!node_.isElementNode()) {
NOTREACHED();
return;
}
const WebElement& element = node_.toConst<WebKit::WebElement>();
unsigned int len = element.attributeCount();
if (len == 0)
return;
for (unsigned int i = 0; i < len; ++i) {
string16 name = element.attributeLocalName(i);
string16 value = element.attributeValue(i);
attrMap.insert(std::make_pair(name, value));
}
}
bool CefDOMNodeImpl::SetElementAttribute(const CefString& attrName,
const CefString& value) {
if (!VerifyContext())
return false;
if (!node_.isElementNode()) {
NOTREACHED();
return false;
}
WebElement element = node_.to<WebKit::WebElement>();
return element.setAttribute(string16(attrName), string16(value));
}
CefString CefDOMNodeImpl::GetElementInnerText() {
CefString str;
if (!VerifyContext())
return str;
if (!node_.isElementNode()) {
NOTREACHED();
return str;
}
WebElement element = node_.to<WebKit::WebElement>();
const WebString& text = element.innerText();
if (!text.isNull())
str = text;
return str;
}
void CefDOMNodeImpl::Detach() {
document_ = NULL;
node_.assign(WebNode());
}
bool CefDOMNodeImpl::VerifyContext() {
if (!document_.get()) {
NOTREACHED();
return false;
}
if (!document_->VerifyContext())
return false;
if (node_.isNull()) {
NOTREACHED();
return false;
}
return true;
}