deepmagic.dom.xml.processing_instruction source code

1 module deepmagic.dom.xml.processing_instruction;
2 
3 import deepmagic.dom;
4 
5 class ProcessingInstruction : Item
6 {
7 	private string content;
8 
9 	/**
10 	 * Construct a Processing Instruction section
11 	 *
12 	 * Params:
13 	 *	  content = the body of the instruction segment
14 	 *
15 	 * Throws: PIException if the segment body is illegal (contains "?>")
16 	 *
17 	 * Examples:
18 	 * --------------
19 	 * auto item = new ProcessingInstruction("php");
20 	 *	// constructs <?php?>
21 	 * --------------
22 	 */
23 	this(string content)
24 	{
25 		if (content.indexOf("?>") != -1) throw new PIException(content);
26 		this.content = content;
27 	}
28 
29 	/**
30 	 * Compares two processing instructions for equality
31 	 *
32 	 * Examples:
33 	 * --------------
34 	 * ProcessingInstruction item1,item2;
35 	 * if (item1 == item2) { }
36 	 * --------------
37 	 */
38 	override bool opEquals(Object o)
39 	{
40 		const item = toType!(const Item)(o);
41 		const t = cast(ProcessingInstruction)item;
42 		return t !is null && content == t.content;
43 	}
44 
45 	/**
46 	 * Compares two processing instructions
47 	 *
48 	 * You should rarely need to call this function. It exists so that
49 	 * ProcessingInstructions can be used as associative array keys.
50 	 *
51 	 * Examples:
52 	 * --------------
53 	 * ProcessingInstruction item1,item2;
54 	 * if (item1 < item2) { }
55 	 * --------------
56 	 */
57 	override int opCmp(Object o)
58 	{
59 		const item = toType!(const Item)(o);
60 		const t = cast(ProcessingInstruction)item;
61 		return t !is null
62 			&& (content != t.content ? (content < t.content ? -1 : 1 ) : 0 );
63 	}
64 
65 	/**
66 	 * Returns the hash of a ProcessingInstruction
67 	 *
68 	 * You should rarely need to call this function. It exists so that
69 	 * ProcessingInstructions can be used as associative array keys.
70 	 */
71 	override size_t toHash() const { return hash(content); }
72 
73 	/**
74 	 * Returns a string representation of this ProcessingInstruction
75 	 */
76 	override string toString() const { return "<?" ~ content ~ "?>"; }
77 
78 	override @property bool isEmptyXML() const { return false; } /// Returns false always
79 }