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juce_XmlElement.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26//==============================================================================
45#define forEachXmlChildElement(parentXmlElement, childElementVariableName) \
46\
47 for (auto* childElementVariableName = (parentXmlElement).getFirstChildElement(); \
48 childElementVariableName != nullptr; \
49 childElementVariableName = childElementVariableName->getNextElement())
50
74#define forEachXmlChildElementWithTagName(parentXmlElement, childElementVariableName, requiredTagName) \
75\
76 for (auto* childElementVariableName = (parentXmlElement).getChildByName (requiredTagName); \
77 childElementVariableName != nullptr; \
78 childElementVariableName = childElementVariableName->getNextElementWithTagName (requiredTagName))
79
80
81//==============================================================================
137 class JUCE_API XmlElement
138{
139 public:
140 //==============================================================================
142 explicit XmlElement (const String& tagName);
143
145 explicit XmlElement (const char* tagName);
146
148 explicit XmlElement (const Identifier& tagName);
149
151 explicit XmlElement (StringRef tagName);
152
154 XmlElement (String::CharPointerType tagNameBegin, String::CharPointerType tagNameEnd);
155
157 XmlElement (const XmlElement&);
158
160 XmlElement& operator= (const XmlElement&);
161
163 XmlElement& operator= (XmlElement&&) noexcept;
164
166 XmlElement (XmlElement&&) noexcept;
167
169 ~XmlElement() noexcept;
170
171 //==============================================================================
183 bool isEquivalentTo (const XmlElement* other,
184 bool ignoreOrderOfAttributes) const noexcept;
185
186 //==============================================================================
190 struct TextFormat
191 {
193 TextFormat();
194
195 String dtd;
196 String customHeader;
197 String customEncoding;
198 bool addDefaultHeader = true;
199 int lineWrapLength = 60;
200 const char* newLineChars = "\r\n";
202 TextFormat singleLine() const;
203 TextFormat withoutHeader() const;
204 };
205
211 String toString (const TextFormat& format = {}) const;
212
216 void writeTo (OutputStream& output, const TextFormat& format = {}) const;
217
221 bool writeTo (const File& destinationFile, const TextFormat& format = {}) const;
222
223 //==============================================================================
228 const String& getTagName() const noexcept { return tagName; }
229
231 String getNamespace() const;
232
234 String getTagNameWithoutNamespace() const;
235
240 bool hasTagName (StringRef possibleTagName) const noexcept;
241
246 bool hasTagNameIgnoringNamespace (StringRef possibleTagName) const;
247
251 void setTagName (StringRef newTagName);
252
253 //==============================================================================
259 int getNumAttributes() const noexcept;
260
268 const String& getAttributeName (int attributeIndex) const noexcept;
269
277 const String& getAttributeValue (int attributeIndex) const noexcept;
278
279 //==============================================================================
280 // Attribute-handling methods..
281
283 bool hasAttribute (StringRef attributeName) const noexcept;
284
288 const String& getStringAttribute (StringRef attributeName) const noexcept;
289
295 String getStringAttribute (StringRef attributeName, const String& defaultReturnValue) const;
296
305 bool compareAttribute (StringRef attributeName,
306 StringRef stringToCompareAgainst,
307 bool ignoreCase = false) const noexcept;
308
319 int getIntAttribute (StringRef attributeName, int defaultReturnValue = 0) const;
320
331 double getDoubleAttribute (StringRef attributeName, double defaultReturnValue = 0.0) const;
332
343 bool getBoolAttribute (StringRef attributeName, bool defaultReturnValue = false) const;
344
358 void setAttribute (const Identifier& attributeName, const String& newValue);
359
372 void setAttribute (const Identifier& attributeName, int newValue);
373
386 void setAttribute (const Identifier& attributeName, double newValue);
387
393 void removeAttribute (const Identifier& attributeName) noexcept;
394
396 void removeAllAttributes() noexcept;
397
398 //==============================================================================
399 // Child element methods..
400
405 XmlElement* getFirstChildElement() const noexcept { return firstChildElement; }
406
433 inline XmlElement* getNextElement() const noexcept { return nextListItem; }
434
443 XmlElement* getNextElementWithTagName (StringRef requiredTagName) const;
444
448 int getNumChildElements() const noexcept;
449
458 XmlElement* getChildElement (int index) const noexcept;
459
466 XmlElement* getChildByName (StringRef tagNameToLookFor) const noexcept;
467
475 XmlElement* getChildByAttribute (StringRef attributeName,
476 StringRef attributeValue) const noexcept;
477
478 //==============================================================================
492 void addChildElement (XmlElement* newChildElement) noexcept;
493
505 void insertChildElement (XmlElement* newChildElement,
506 int indexToInsertAt) noexcept;
507
520 void prependChildElement (XmlElement* newChildElement) noexcept;
521
536 XmlElement* createNewChildElement (StringRef tagName);
537
545 bool replaceChildElement (XmlElement* currentChildElement,
546 XmlElement* newChildNode) noexcept;
547
554 void removeChildElement (XmlElement* childToRemove,
555 bool shouldDeleteTheChild) noexcept;
556
560 void deleteAllChildElements() noexcept;
561
565 void deleteAllChildElementsWithTagName (StringRef tagName) noexcept;
566
568 bool containsChildElement (const XmlElement* possibleChild) const noexcept;
569
580 XmlElement* findParentElementOf (const XmlElement* childToSearchFor) noexcept;
581
582 //==============================================================================
605 template <class ElementComparator>
606 void sortChildElements (ElementComparator& comparator,
607 bool retainOrderOfEquivalentItems = false)
608 {
609 auto num = getNumChildElements();
610
611 if (num > 1)
612 {
613 HeapBlock<XmlElement*> elems (num);
614 getChildElementsAsArray (elems);
615 sortArray (comparator, (XmlElement**) elems, 0, num - 1, retainOrderOfEquivalentItems);
616 reorderChildElements (elems, num);
617 }
618 }
619
620 //==============================================================================
628 bool isTextElement() const noexcept;
629
646 const String& getText() const noexcept;
647
654 void setText (const String& newText);
655
669 String getAllSubText() const;
670
679 String getChildElementAllSubText (StringRef childTagName,
680 const String& defaultReturnValue) const;
681
685 void addTextElement (const String& text);
686
690 void deleteAllTextElements() noexcept;
691
693 static XmlElement* createTextElement (const String& text);
694
696 static bool isValidXmlName (StringRef possibleName) noexcept;
697
698 //==============================================================================
700 JUCE_DEPRECATED (String createDocument (StringRef dtdToUse,
701 bool allOnOneLine = false,
702 bool includeXmlHeader = true,
703 StringRef encodingType = "UTF-8",
704 int lineWrapLength = 60) const);
705
707 JUCE_DEPRECATED (void writeToStream (OutputStream& output,
708 StringRef dtdToUse,
709 bool allOnOneLine = false,
710 bool includeXmlHeader = true,
711 StringRef encodingType = "UTF-8",
712 int lineWrapLength = 60) const);
713
715 JUCE_DEPRECATED (bool writeToFile (const File& destinationFile,
716 StringRef dtdToUse,
717 StringRef encodingType = "UTF-8",
718 int lineWrapLength = 60) const);
719
720 //==============================================================================
721private:
722 struct XmlAttributeNode
723 {
724 XmlAttributeNode (const XmlAttributeNode&) noexcept;
725 XmlAttributeNode (const Identifier&, const String&) noexcept;
726 XmlAttributeNode (String::CharPointerType, String::CharPointerType);
727
728 LinkedListPointer<XmlAttributeNode> nextListItem;
729 Identifier name;
730 String value;
731
732 private:
733 XmlAttributeNode& operator= (const XmlAttributeNode&) = delete;
734 };
735
736 friend class XmlDocument;
737 friend class LinkedListPointer<XmlAttributeNode>;
738 friend class LinkedListPointer<XmlElement>;
739 friend class LinkedListPointer<XmlElement>::Appender;
740 friend class NamedValueSet;
741
742 LinkedListPointer<XmlElement> nextListItem, firstChildElement;
743 LinkedListPointer<XmlAttributeNode> attributes;
744 String tagName;
745
746 XmlElement (int) noexcept;
747 void copyChildrenAndAttributesFrom (const XmlElement&);
748 void writeElementAsText (OutputStream&, int, int, const char*) const;
749 void getChildElementsAsArray (XmlElement**) const noexcept;
750 void reorderChildElements (XmlElement**, int) noexcept;
751 XmlAttributeNode* getAttribute (StringRef) const noexcept;
752
753 // Sigh.. L"" or _T("") string literals are problematic in general, and really inappropriate
754 // for XML tags. Use a UTF-8 encoded literal instead, or if you're really determined to use
755 // UTF-16, cast it to a String and use the other constructor.
756 XmlElement (const wchar_t*) = delete;
757
758 JUCE_LEAK_DETECTOR (XmlElement)
759};
760
761} // namespace juce
juce::File
Definition: juce_File.h:41
juce::HeapBlock
Definition: juce_HeapBlock.h:87
juce::Identifier
Definition: juce_Identifier.h:39
juce::LinkedListPointer
Definition: juce_LinkedListPointer.h:57
juce::NamedValueSet
Definition: juce_NamedValueSet.h:35
juce::OutputStream
Definition: juce_OutputStream.h:38
juce::StringRef
Definition: juce_StringRef.h:62
juce::String
Definition: juce_String.h:39
juce::XmlDocument
Definition: juce_XmlDocument.h:64
juce::XmlElement
Definition: juce_XmlElement.h:138
juce::XmlElement::getNextElement
XmlElement * getNextElement() const noexcept
Definition: juce_XmlElement.h:433
juce::XmlElement::getTagName
const String & getTagName() const noexcept
Definition: juce_XmlElement.h:228
juce::XmlElement::TextFormat
Definition: juce_XmlElement.h:191
juce::XmlElement::TextFormat::customEncoding
String customEncoding
Definition: juce_XmlElement.h:197
juce::XmlElement::TextFormat::dtd
String dtd
Definition: juce_XmlElement.h:195
juce::XmlElement::TextFormat::customHeader
String customHeader
Definition: juce_XmlElement.h:196