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https://bitbucket.org/chromiumembedded/cef
synced 2025-06-05 21:39:12 +02:00
Expose XML parsing support (issue #28).
git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@119 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
This commit is contained in:
Marshall Greenblatt
488
libcef_dll/wrapper/cef_xml_object.cc
Normal file
488
libcef_dll/wrapper/cef_xml_object.cc
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@ -0,0 +1,488 @@
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// Copyright (c) 2010 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include "include/cef_wrapper.h"
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#include "base/logging.h"
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namespace {
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class CefXmlObjectLoader
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{
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public:
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CefXmlObjectLoader(CefRefPtr<CefXmlObject> root_object)
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: root_object_(root_object)
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{
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}
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bool Load(CefRefPtr<CefStreamReader> stream,
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CefXmlReader::EncodingType encodingType,
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const std::wstring& URI)
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{
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CefRefPtr<CefXmlReader> reader(
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CefXmlReader::Create(stream, encodingType, URI));
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if (!reader.get())
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return false;
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bool ret = reader->MoveToNextElement();
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if (ret) {
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CefRefPtr<CefXmlObject> cur_object(root_object_), new_object;
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CefXmlObject::ObjectVector queue;
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int cur_depth, value_depth = -1;
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CefXmlReader::NodeType cur_type;
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std::wstringstream cur_value;
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bool last_has_ns = false;
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queue.push_back(root_object_);
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do {
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cur_depth = reader->GetDepth();
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if (value_depth >= 0 && cur_depth > value_depth) {
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// The current node has already been parsed as part of a value.
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continue;
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}
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cur_type = reader->GetType();
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if (cur_type == XML_NODE_ELEMENT_START) {
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if (cur_depth == value_depth) {
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// Add to the current value.
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cur_value << reader->GetOuterXml();
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continue;
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} else if(last_has_ns && reader->GetPrefix().empty()) {
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if (!cur_object->HasChildren()) {
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// Start a new value because the last element has a namespace and
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// this element does not.
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value_depth = cur_depth;
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cur_value << reader->GetOuterXml();
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} else {
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// Value following a child element is not allowed.
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std::wstringstream ss;
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ss << L"Value following child element, line " <<
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reader->GetLineNumber();
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load_error_ = ss.str();
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ret = false;
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break;
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}
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} else {
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// Start a new element.
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new_object = new CefXmlObject(reader->GetQualifiedName());
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cur_object->AddChild(new_object);
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last_has_ns = !reader->GetPrefix().empty();
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if (!reader->IsEmptyElement()) {
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// The new element potentially has a value and/or children, so
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// set the current object and add the object to the queue.
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cur_object = new_object;
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queue.push_back(cur_object);
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}
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if (reader->HasAttributes() && reader->MoveToFirstAttribute()) {
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// Read all object attributes.
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do {
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new_object->SetAttributeValue(reader->GetQualifiedName(),
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reader->GetValue());
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} while(reader->MoveToNextAttribute());
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reader->MoveToCarryingElement();
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}
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}
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} else if(cur_type == XML_NODE_ELEMENT_END) {
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if (cur_depth == value_depth) {
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// Ending an element that is already in the value.
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continue;
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} else if (cur_depth < value_depth) {
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// Done with parsing the value portion of the current element.
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cur_object->SetValue(cur_value.str());
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cur_value.str(L"");
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value_depth = -1;
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}
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// Pop the current element from the queue.
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queue.pop_back();
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if (queue.empty() ||
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cur_object->GetName() != reader->GetQualifiedName()) {
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// Open tag without close tag or close tag without open tag should
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// never occur (the parser catches this error).
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NOTREACHED();
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std::wstringstream ss;
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ss << L"Mismatched end tag for " << cur_object->GetName() <<
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L", line " << reader->GetLineNumber();
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load_error_ = ss.str();
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ret = false;
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break;
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}
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// Set the current object to the previous object in the queue.
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cur_object = queue.back().get();
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} else if(cur_type == XML_NODE_TEXT || cur_type == XML_NODE_CDATA ||
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cur_type == XML_NODE_ENTITY_REFERENCE) {
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if (cur_depth == value_depth) {
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// Add to the current value.
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cur_value << reader->GetValue();
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} else if (!cur_object->HasChildren()) {
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// Start a new value.
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value_depth = cur_depth;
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cur_value << reader->GetValue();
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} else {
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// Value following a child element is not allowed.
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std::wstringstream ss;
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ss << L"Value following child element, line " <<
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reader->GetLineNumber();
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load_error_ = ss.str();
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ret = false;
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break;
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}
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}
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} while(reader->MoveToNextElement());
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}
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if (reader->HasError()) {
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load_error_ = reader->GetError();
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return false;
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}
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return ret;
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}
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std::wstring GetLoadError() { return load_error_; }
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private:
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std::wstring load_error_;
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CefRefPtr<CefXmlObject> root_object_;
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};
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} // namespace
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CefXmlObject::CefXmlObject(const std::wstring& name)
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: name_(name), parent_(NULL)
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{
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}
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CefXmlObject::~CefXmlObject()
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{
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}
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bool CefXmlObject::Load(CefRefPtr<CefStreamReader> stream,
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CefXmlReader::EncodingType encodingType,
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const std::wstring& URI, std::wstring* loadError)
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{
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AutoLock lock_scope(this);
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Clear();
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CefXmlObjectLoader loader(this);
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if (!loader.Load(stream, encodingType, URI)) {
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if (loadError)
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*loadError = loader.GetLoadError();
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return false;
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}
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return true;
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}
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void CefXmlObject::Set(CefRefPtr<CefXmlObject> object)
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{
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DCHECK(object.get());
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AutoLock lock_scope1(this);
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AutoLock lock_scope2(object);
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Clear();
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name_ = object->GetName();
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Append(object, true);
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}
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void CefXmlObject::Append(CefRefPtr<CefXmlObject> object,
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bool overwriteAttributes)
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{
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DCHECK(object.get());
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AutoLock lock_scope1(this);
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AutoLock lock_scope2(object);
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if (object->HasChildren()) {
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ObjectVector children;
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object->GetChildren(children);
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ObjectVector::const_iterator it = children.begin();
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for (; it != children.end(); ++it)
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AddChild((*it)->Duplicate());
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}
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if (object->HasAttributes()) {
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AttributeMap attributes;
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object->GetAttributes(attributes);
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AttributeMap::const_iterator it = attributes.begin();
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for (; it != attributes.end(); ++it) {
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if (overwriteAttributes || !HasAttribute(it->first))
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SetAttributeValue(it->first, it->second);
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}
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}
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}
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CefRefPtr<CefXmlObject> CefXmlObject::Duplicate()
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{
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CefRefPtr<CefXmlObject> new_obj;
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{
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AutoLock lock_scope(this);
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new_obj = new CefXmlObject(name_);
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new_obj->Append(this, true);
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}
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return new_obj;
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}
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void CefXmlObject::Clear()
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{
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AutoLock lock_scope(this);
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ClearChildren();
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ClearAttributes();
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}
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std::wstring CefXmlObject::GetName()
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{
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std::wstring name;
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{
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AutoLock lock_scope(this);
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name = name_;
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}
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return name;
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}
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bool CefXmlObject::SetName(const std::wstring& name)
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{
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DCHECK(!name.empty());
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if (name.empty())
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return false;
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AutoLock lock_scope(this);
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name_ = name;
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return true;
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}
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bool CefXmlObject::HasParent()
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{
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AutoLock lock_scope(this);
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return (parent_ != NULL);
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}
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CefRefPtr<CefXmlObject> CefXmlObject::GetParent()
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{
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CefRefPtr<CefXmlObject> parent;
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{
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AutoLock lock_scope(this);
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parent = parent_;
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}
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return parent;
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}
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bool CefXmlObject::HasValue()
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{
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AutoLock lock_scope(this);
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return !value_.empty();
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}
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std::wstring CefXmlObject::GetValue()
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{
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std::wstring value;
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{
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AutoLock lock_scope(this);
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value = value_;
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}
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return value;
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}
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bool CefXmlObject::SetValue(const std::wstring& value)
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{
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AutoLock lock_scope(this);
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DCHECK(children_.empty());
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if (!children_.empty())
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return false;
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value_ = value;
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return true;
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}
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bool CefXmlObject::HasAttributes()
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{
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AutoLock lock_scope(this);
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return !attributes_.empty();
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}
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size_t CefXmlObject::GetAttributeCount()
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{
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AutoLock lock_scope(this);
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return attributes_.size();
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}
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bool CefXmlObject::HasAttribute(const std::wstring& name)
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{
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if (name.empty())
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return false;
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AutoLock lock_scope(this);
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AttributeMap::const_iterator it = attributes_.find(name);
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return (it != attributes_.end());
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}
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std::wstring CefXmlObject::GetAttributeValue(const std::wstring& name)
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{
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DCHECK(!name.empty());
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std::wstring value;
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if (!name.empty()) {
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AutoLock lock_scope(this);
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AttributeMap::const_iterator it = attributes_.find(name);
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if (it != attributes_.end())
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value = it->second;
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}
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return value;
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}
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bool CefXmlObject::SetAttributeValue(const std::wstring& name,
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const std::wstring& value)
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{
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DCHECK(!name.empty());
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if (name.empty())
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return false;
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AutoLock lock_scope(this);
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AttributeMap::iterator it = attributes_.find(name);
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if (it != attributes_.end()) {
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it->second = value;
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} else {
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attributes_.insert(
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std::make_pair<std::wstring,std::wstring>(name, value));
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}
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return true;
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}
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size_t CefXmlObject::GetAttributes(AttributeMap& attributes)
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{
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AutoLock lock_scope(this);
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attributes = attributes_;
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return attributes_.size();
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}
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void CefXmlObject::ClearAttributes()
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{
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AutoLock lock_scope(this);
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attributes_.clear();
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}
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bool CefXmlObject::HasChildren()
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{
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AutoLock lock_scope(this);
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return !children_.empty();
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}
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size_t CefXmlObject::GetChildCount()
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{
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AutoLock lock_scope(this);
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return children_.size();
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}
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bool CefXmlObject::HasChild(CefRefPtr<CefXmlObject> child)
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{
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DCHECK(child.get());
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AutoLock lock_scope(this);
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ObjectVector::const_iterator it = children_.begin();
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for (; it != children_.end(); ++it) {
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if ((*it).get() == child.get())
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return true;
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}
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return false;
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}
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bool CefXmlObject::AddChild(CefRefPtr<CefXmlObject> child)
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{
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DCHECK(child.get());
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if (!child.get())
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return false;
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AutoLock lock_scope1(child);
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DCHECK(child->GetParent() == NULL);
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if (child->GetParent() != NULL)
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return false;
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AutoLock lock_scope2(this);
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children_.push_back(child);
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child->SetParent(this);
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return true;
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}
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bool CefXmlObject::RemoveChild(CefRefPtr<CefXmlObject> child)
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{
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DCHECK(child.get());
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AutoLock lock_scope(this);
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ObjectVector::iterator it = children_.begin();
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for (; it != children_.end(); ++it) {
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if ((*it).get() == child.get()) {
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children_.erase(it);
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child->SetParent(NULL);
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return true;
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}
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}
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return false;
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}
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size_t CefXmlObject::GetChildren(ObjectVector& children)
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{
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AutoLock lock_scope(this);
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children = children_;
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return children_.size();
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}
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void CefXmlObject::ClearChildren()
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{
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AutoLock lock_scope(this);
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ObjectVector::iterator it = children_.begin();
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for (; it != children_.end(); ++it)
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(*it)->SetParent(NULL);
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children_.clear();
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}
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CefRefPtr<CefXmlObject> CefXmlObject::FindChild(const std::wstring& name)
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{
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DCHECK(!name.empty());
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if (name.empty())
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return NULL;
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AutoLock lock_scope(this);
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ObjectVector::const_iterator it = children_.begin();
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for (; it != children_.end(); ++it) {
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if((*it)->GetName() == name)
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return (*it);
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}
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return NULL;
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}
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size_t CefXmlObject::FindChildren(const std::wstring& name,
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ObjectVector& children)
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{
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DCHECK(!name.empty());
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if (name.empty())
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return 0;
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size_t ct = 0;
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AutoLock lock_scope(this);
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ObjectVector::const_iterator it = children_.begin();
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for (; it != children_.end(); ++it) {
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if((*it)->GetName() == name) {
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children.push_back(*it);
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ct++;
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}
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}
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return ct;
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}
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void CefXmlObject::SetParent(CefXmlObject* parent)
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{
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AutoLock lock_scope(this);
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if (parent) {
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DCHECK(parent_ == NULL);
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parent_ = parent;
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} else {
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DCHECK(parent_ != NULL);
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parent_ = NULL;
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}
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}
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