1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 * Copyright (C) 2006 Samuel Weinig (sam@webkit.org)
7 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public License
20 * along with this library; see the file COPYING.LIB.  If not, write to
21 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 */
24
25#include "config.h"
26#include "DOMImplementation.h"
27
28#include "ContentType.h"
29#include "CSSStyleSheet.h"
30#include "ContextFeatures.h"
31#include "DocumentType.h"
32#include "Element.h"
33#include "ExceptionCode.h"
34#include "Frame.h"
35#include "FrameLoader.h"
36#include "FrameLoaderClient.h"
37#include "FTPDirectoryDocument.h"
38#include "HTMLDocument.h"
39#include "HTMLNames.h"
40#include "HTMLViewSourceDocument.h"
41#include "Image.h"
42#include "ImageDocument.h"
43#include "MediaDocument.h"
44#include "MediaList.h"
45#include "MediaPlayer.h"
46#include "MIMETypeRegistry.h"
47#include "Page.h"
48#include "PluginData.h"
49#include "PluginDocument.h"
50#include "SecurityOrigin.h"
51#include "Settings.h"
52#include "StyleSheetContents.h"
53#include "TextDocument.h"
54#include "ThreadGlobalData.h"
55#include "XMLNames.h"
56#include <wtf/StdLibExtras.h>
57
58#if ENABLE(SVG)
59#include "SVGNames.h"
60#include "SVGDocument.h"
61#endif
62
63namespace WebCore {
64
65typedef HashSet<String, CaseFoldingHash> FeatureSet;
66
67static void addString(FeatureSet& set, const char* string)
68{
69    set.add(string);
70}
71
72#if ENABLE(VIDEO)
73class DOMImplementationSupportsTypeClient : public MediaPlayerSupportsTypeClient {
74public:
75    DOMImplementationSupportsTypeClient(bool needsHacks, const String& host)
76        : m_needsHacks(needsHacks)
77        , m_host(host)
78    {
79    }
80
81private:
82    virtual bool mediaPlayerNeedsSiteSpecificHacks() const OVERRIDE { return m_needsHacks; }
83    virtual String mediaPlayerDocumentHost() const OVERRIDE { return m_host; }
84
85    bool m_needsHacks;
86    String m_host;
87};
88#endif
89
90#if ENABLE(SVG)
91
92static bool isSVG10Feature(const String &feature, const String &version)
93{
94    if (!version.isEmpty() && version != "1.0")
95        return false;
96
97    static bool initialized = false;
98    DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
99    if (!initialized) {
100#if ENABLE(FILTERS) && ENABLE(SVG_FONTS)
101        addString(svgFeatures, "svg");
102        addString(svgFeatures, "svg.static");
103#endif
104//      addString(svgFeatures, "svg.animation");
105//      addString(svgFeatures, "svg.dynamic");
106//      addString(svgFeatures, "svg.dom.animation");
107//      addString(svgFeatures, "svg.dom.dynamic");
108#if ENABLE(FILTERS) && ENABLE(SVG_FONTS)
109        addString(svgFeatures, "dom");
110        addString(svgFeatures, "dom.svg");
111        addString(svgFeatures, "dom.svg.static");
112#endif
113//      addString(svgFeatures, "svg.all");
114//      addString(svgFeatures, "dom.svg.all");
115        initialized = true;
116    }
117    return feature.startsWith("org.w3c.", false)
118        && svgFeatures.contains(feature.right(feature.length() - 8));
119}
120
121static bool isSVG11Feature(const String &feature, const String &version)
122{
123    if (!version.isEmpty() && version != "1.1")
124        return false;
125
126    static bool initialized = false;
127    DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
128    if (!initialized) {
129        // Sadly, we cannot claim to implement any of the SVG 1.1 generic feature sets
130        // lack of Font and Filter support.
131        // http://bugs.webkit.org/show_bug.cgi?id=15480
132#if ENABLE(FILTERS) && ENABLE(SVG_FONTS)
133        addString(svgFeatures, "SVG");
134        addString(svgFeatures, "SVGDOM");
135        addString(svgFeatures, "SVG-static");
136        addString(svgFeatures, "SVGDOM-static");
137#endif
138        addString(svgFeatures, "SVG-animation");
139        addString(svgFeatures, "SVGDOM-animation");
140//      addString(svgFeatures, "SVG-dynamic);
141//      addString(svgFeatures, "SVGDOM-dynamic);
142        addString(svgFeatures, "CoreAttribute");
143        addString(svgFeatures, "Structure");
144        addString(svgFeatures, "BasicStructure");
145        addString(svgFeatures, "ContainerAttribute");
146        addString(svgFeatures, "ConditionalProcessing");
147        addString(svgFeatures, "Image");
148        addString(svgFeatures, "Style");
149        addString(svgFeatures, "ViewportAttribute");
150        addString(svgFeatures, "Shape");
151        addString(svgFeatures, "Text");
152        addString(svgFeatures, "BasicText");
153        addString(svgFeatures, "PaintAttribute");
154        addString(svgFeatures, "BasicPaintAttribute");
155        addString(svgFeatures, "OpacityAttribute");
156        addString(svgFeatures, "GraphicsAttribute");
157        addString(svgFeatures, "BaseGraphicsAttribute");
158        addString(svgFeatures, "Marker");
159//      addString(svgFeatures, "ColorProfile"); // requires color-profile, bug 6037
160        addString(svgFeatures, "Gradient");
161        addString(svgFeatures, "Pattern");
162        addString(svgFeatures, "Clip");
163        addString(svgFeatures, "BasicClip");
164        addString(svgFeatures, "Mask");
165#if ENABLE(FILTERS)
166        addString(svgFeatures, "Filter");
167        addString(svgFeatures, "BasicFilter");
168#endif
169        addString(svgFeatures, "DocumentEventsAttribute");
170        addString(svgFeatures, "GraphicalEventsAttribute");
171//      addString(svgFeatures, "AnimationEventsAttribute");
172        addString(svgFeatures, "Cursor");
173        addString(svgFeatures, "Hyperlinking");
174        addString(svgFeatures, "XlinkAttribute");
175        addString(svgFeatures, "ExternalResourcesRequired");
176        addString(svgFeatures, "View");
177        addString(svgFeatures, "Script");
178        addString(svgFeatures, "Animation");
179#if ENABLE(SVG_FONTS)
180        addString(svgFeatures, "Font");
181        addString(svgFeatures, "BasicFont");
182#endif
183        addString(svgFeatures, "Extensibility");
184        initialized = true;
185    }
186    return feature.startsWith("http://www.w3.org/tr/svg11/feature#", false)
187        && svgFeatures.contains(feature.right(feature.length() - 35));
188}
189#endif
190
191static bool isEvents2Feature(const String &feature, const String &version)
192{
193    if (!version.isEmpty() && version != "2.0")
194        return false;
195
196    static bool initialized = false;
197    DEFINE_STATIC_LOCAL(FeatureSet, events2Features, ());
198    if (!initialized) {
199        addString(events2Features, "Events");
200        addString(events2Features, "HTMLEvents");
201        addString(events2Features, "MouseEvents");
202        addString(events2Features, "MutationEvents");
203        addString(events2Features, "UIEvents");
204        initialized = true;
205    }
206    return events2Features.contains(feature);
207}
208
209static bool isEvents3Feature(const String &feature, const String &version)
210{
211    if (!version.isEmpty() && version != "3.0")
212        return false;
213
214    static bool initialized = false;
215    DEFINE_STATIC_LOCAL(FeatureSet, events3Features, ());
216    if (!initialized) {
217        // FIXME: We probably support many of these features.
218//        addString(events3Features, "CompositionEvents");
219//        addString(events3Features, "Events");
220//        addString(events3Features, "FocusEvents");
221//        addString(events3Features, "HTMLEvents");
222//        addString(events3Features, "KeyboardEvents");
223//        addString(events3Features, "MouseEvents");
224//        addString(events3Features, "MutationEvents");
225//        addString(events3Features, "MutationNameEvents");
226        addString(events3Features, "TextEvents");
227//        addString(events3Features, "UIEvents");
228//        addString(events3Features, "WheelEvents");
229        initialized = true;
230    }
231    // FIXME: We do not yet support Events 3 "extended feature strings".
232    return events3Features.contains(feature);
233}
234
235DOMImplementation::DOMImplementation(Document* document)
236    : m_document(document)
237{
238}
239
240bool DOMImplementation::hasFeature(const String& feature, const String& version)
241{
242    String lower = feature.lower();
243    if (lower == "core" || lower == "html" || lower == "xml" || lower == "xhtml")
244        return version.isEmpty() || version == "1.0" || version == "2.0";
245    if (lower == "css"
246            || lower == "css2"
247            || lower == "range"
248            || lower == "stylesheets"
249            || lower == "traversal"
250            || lower == "views")
251        return version.isEmpty() || version == "2.0";
252    if (isEvents2Feature(feature, version))
253        return true;
254    if (lower == "xpath")
255        return version.isEmpty() || version == "3.0";
256    if (isEvents3Feature(feature, version))
257        return true;
258
259#if ENABLE(SVG)
260    if (isSVG11Feature(feature, version))
261        return true;
262    if (isSVG10Feature(feature, version))
263        return true;
264#endif
265
266    return false;
267}
268
269PassRefPtr<DocumentType> DOMImplementation::createDocumentType(const String& qualifiedName,
270    const String& publicId, const String& systemId, ExceptionCode& ec)
271{
272    String prefix, localName;
273    if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
274        return 0;
275
276    return DocumentType::create(0, qualifiedName, publicId, systemId);
277}
278
279DOMImplementation* DOMImplementation::getInterface(const String& /*feature*/)
280{
281    return 0;
282}
283
284PassRefPtr<Document> DOMImplementation::createDocument(const String& namespaceURI,
285    const String& qualifiedName, DocumentType* doctype, ExceptionCode& ec)
286{
287    RefPtr<Document> doc;
288#if ENABLE(SVG)
289    if (namespaceURI == SVGNames::svgNamespaceURI)
290        doc = SVGDocument::create(0, KURL());
291    else
292#endif
293    if (namespaceURI == HTMLNames::xhtmlNamespaceURI)
294        doc = Document::createXHTML(0, KURL());
295    else
296        doc = Document::create(0, KURL());
297
298    doc->setSecurityOrigin(m_document->securityOrigin());
299    doc->setContextFeatures(m_document->contextFeatures());
300
301    RefPtr<Node> documentElement;
302    if (!qualifiedName.isEmpty()) {
303        documentElement = doc->createElementNS(namespaceURI, qualifiedName, ec);
304        if (ec)
305            return 0;
306    }
307
308    // WRONG_DOCUMENT_ERR: Raised if doctype has already been used with a different document or was
309    // created from a different implementation.
310    // Hixie's interpretation of the DOM Core spec suggests we should prefer
311    // other exceptions to WRONG_DOCUMENT_ERR (based on order mentioned in spec),
312    // but this matches the new DOM Core spec (http://www.w3.org/TR/domcore/).
313    if (doctype && doctype->document()) {
314        ec = WRONG_DOCUMENT_ERR;
315        return 0;
316    }
317
318    if (doctype)
319        doc->appendChild(doctype);
320    if (documentElement)
321        doc->appendChild(documentElement.release());
322
323    return doc.release();
324}
325
326PassRefPtr<CSSStyleSheet> DOMImplementation::createCSSStyleSheet(const String&, const String& media, ExceptionCode&)
327{
328    // FIXME: Title should be set.
329    // FIXME: Media could have wrong syntax, in which case we should generate an exception.
330    RefPtr<CSSStyleSheet> sheet = CSSStyleSheet::create(StyleSheetContents::create());
331    sheet->setMediaQueries(MediaQuerySet::createAllowingDescriptionSyntax(media));
332    return sheet;
333}
334
335static inline bool isValidXMLMIMETypeChar(UChar c)
336{
337    // Valid characters per RFCs 3023 and 2045:
338    // 0-9a-zA-Z_-+~!$^{}|.%'`#&*
339    return isASCIIAlphanumeric(c) || c == '!' || c == '#' || c == '$' || c == '%' || c == '&' || c == '\'' || c == '*' || c == '+'
340        || c == '-' || c == '.' || c == '^' || c == '_' || c == '`' || c == '{' || c == '|' || c == '}' || c == '~';
341}
342
343bool DOMImplementation::isXMLMIMEType(const String& mimeType)
344{
345    if (mimeType == "text/xml" || mimeType == "application/xml" || mimeType == "text/xsl")
346        return true;
347
348    if (!mimeType.endsWith("+xml"))
349        return false;
350
351    size_t slashPosition = mimeType.find('/');
352    // Take into account the '+xml' ending of mimeType.
353    if (slashPosition == notFound || !slashPosition || slashPosition == mimeType.length() - 5)
354        return false;
355
356    // Again, mimeType ends with '+xml', no need to check the validity of that substring.
357    for (size_t i = 0; i < mimeType.length() - 4; ++i) {
358        if (!isValidXMLMIMETypeChar(mimeType[i]) && i != slashPosition)
359            return false;
360    }
361
362    return true;
363}
364
365bool DOMImplementation::isTextMIMEType(const String& mimeType)
366{
367    if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType)
368        || mimeType == "application/json" // Render JSON as text/plain.
369        || (mimeType.startsWith("text/") && mimeType != "text/html"
370            && mimeType != "text/xml" && mimeType != "text/xsl"))
371        return true;
372
373    return false;
374}
375
376PassRefPtr<HTMLDocument> DOMImplementation::createHTMLDocument(const String& title)
377{
378    RefPtr<HTMLDocument> d = HTMLDocument::create(0, KURL());
379    d->open();
380    d->write("<!doctype html><html><body></body></html>");
381    if (!title.isNull())
382        d->setTitle(title);
383    d->setSecurityOrigin(m_document->securityOrigin());
384    d->setContextFeatures(m_document->contextFeatures());
385    return d.release();
386}
387
388PassRefPtr<Document> DOMImplementation::createDocument(const String& type, Frame* frame, const KURL& url, bool inViewSourceMode)
389{
390    if (inViewSourceMode)
391        return HTMLViewSourceDocument::create(frame, url, type);
392
393    // Plugins cannot take HTML and XHTML from us, and we don't even need to initialize the plugin database for those.
394    if (type == "text/html")
395        return HTMLDocument::create(frame, url);
396    if (type == "application/xhtml+xml")
397        return Document::createXHTML(frame, url);
398
399#if ENABLE(FTPDIR)
400    // Plugins cannot take FTP from us either
401    if (type == "application/x-ftp-directory")
402        return FTPDirectoryDocument::create(frame, url);
403#endif
404
405    PluginData* pluginData = 0;
406    PluginData::AllowedPluginTypes allowedPluginTypes = PluginData::OnlyApplicationPlugins;
407    if (frame && frame->page()) {
408        if (frame->loader()->subframeLoader()->allowPlugins(NotAboutToInstantiatePlugin))
409            allowedPluginTypes = PluginData::AllPlugins;
410
411        pluginData = frame->page()->pluginData();
412    }
413
414    // PDF is one image type for which a plugin can override built-in support.
415    // We do not want QuickTime to take over all image types, obviously.
416    if ((MIMETypeRegistry::isPDFOrPostScriptMIMEType(type)) && pluginData && pluginData->supportsMimeType(type, allowedPluginTypes))
417        return PluginDocument::create(frame, url);
418    if (Image::supportsType(type))
419        return ImageDocument::create(frame, url);
420
421#if ENABLE(VIDEO)
422     // Check to see if the type can be played by our MediaPlayer, if so create a MediaDocument
423    // Key system is not applicable here.
424    DOMImplementationSupportsTypeClient client(frame && frame->settings() && frame->settings()->needsSiteSpecificQuirks(), url.host());
425    if (MediaPlayer::supportsType(ContentType(type), String(), url, &client))
426         return MediaDocument::create(frame, url);
427#endif
428
429    // Everything else except text/plain can be overridden by plugins. In particular, Adobe SVG Viewer should be used for SVG, if installed.
430    // Disallowing plug-ins to use text/plain prevents plug-ins from hijacking a fundamental type that the browser is expected to handle,
431    // and also serves as an optimization to prevent loading the plug-in database in the common case.
432    if (type != "text/plain" && ((pluginData && pluginData->supportsMimeType(type, allowedPluginTypes)) || (frame && frame->loader()->client()->shouldAlwaysUsePluginDocument(type))))
433        return PluginDocument::create(frame, url);
434    if (isTextMIMEType(type))
435        return TextDocument::create(frame, url);
436
437#if ENABLE(SVG)
438    if (type == "image/svg+xml")
439        return SVGDocument::create(frame, url);
440#endif
441    if (isXMLMIMEType(type))
442        return Document::create(frame, url);
443
444    return HTMLDocument::create(frame, url);
445}
446
447}
448