includes/parser/Preprocessor.php

   1 <?php
   2
   3 /**
   4  * @ingroup Parser
   5  */
   6 interface Preprocessor {
   7         /** Create a new preprocessor object based on an initialised Parser object */
   8         function __construct( $parser );
   9
  10         /** Create a new top-level frame for expansion of a page */
  11         function newFrame();
  12
  13         /** Create a new custom frame for programmatic use of parameter replacement as used in some extensions */
  14         function newCustomFrame( $args );
  15
  16         /** Preprocess text to a PPNode */
  17         function preprocessToObj( $text, $flags = 0 );
  18 }
  19
  20 /**
  21  * @ingroup Parser
  22  */
  23 interface PPFrame {
  24         const NO_ARGS = 1;
  25         const NO_TEMPLATES = 2;
  26         const STRIP_COMMENTS = 4;
  27         const NO_IGNORE = 8;
  28         const RECOVER_COMMENTS = 16;
  29
  30         const RECOVER_ORIG = 27; // = 1|2|8|16 no constant expression support in PHP yet
  31
  32         /**
  33          * Create a child frame
  34          */
  35         function newChild( $args = false, $title = false );
  36
  37         /**
  38          * Expand a document tree node
  39          */
  40         function expand( $root, $flags = 0 );
  41
  42         /**
  43          * Implode with flags for expand()
  44          */
  45         function implodeWithFlags( $sep, $flags /*, ... */ );
  46
  47         /**
  48          * Implode with no flags specified
  49          */
  50         function implode( $sep /*, ... */ );
  51
  52         /**
  53          * Makes an object that, when expand()ed, will be the same as one obtained
  54          * with implode()
  55          */
  56         function virtualImplode( $sep /*, ... */ );
  57
  58         /**
  59          * Virtual implode with brackets
  60          */
  61         function virtualBracketedImplode( $start, $sep, $end /*, ... */ );
  62
  63         /**
  64          * Returns true if there are no arguments in this frame
  65          */
  66         function isEmpty();
  67
  68         /**
  69          * Returns all arguments of this frame
  70          */
  71         function getArguments();
  72
  73         /**
  74          * Returns all numbered arguments of this frame
  75          */
  76         function getNumberedArguments();
  77
  78         /**
  79          * Returns all named arguments of this frame
  80          */
  81         function getNamedArguments();
  82
  83         /**
  84          * Get an argument to this frame by name
  85          */
  86         function getArgument( $name );
  87
  88         /**
  89          * Returns true if the infinite loop check is OK, false if a loop is detected
  90          */
  91         function loopCheck( $title );
  92
  93         /**
  94          * Return true if the frame is a template frame
  95          */
  96         function isTemplate();
  97 }
  98
  99 /**
 100  * There are three types of nodes:
 101  *     * Tree nodes, which have a name and contain other nodes as children
 102  *     * Array nodes, which also contain other nodes but aren't considered part of a tree
 103  *     * Leaf nodes, which contain the actual data
 104  *
 105  * This interface provides access to the tree structure and to the contents of array nodes,
 106  * but it does not provide access to the internal structure of leaf nodes. Access to leaf
 107  * data is provided via two means:
 108  *     * PPFrame::expand(), which provides expanded text
 109  *     * The PPNode::split*() functions, which provide metadata about certain types of tree node
 110  * @ingroup Parser
 111  */
 112 interface PPNode {
 113         /**
 114          * Get an array-type node containing the children of this node.
 115          * Returns false if this is not a tree node.
 116          */
 117         function getChildren();
 118
 119         /**
 120          * Get the first child of a tree node. False if there isn't one.
 121          */
 122         function getFirstChild();
 123
 124         /**
 125          * Get the next sibling of any node. False if there isn't one
 126          */
 127         function getNextSibling();
 128
 129         /**
 130          * Get all children of this tree node which have a given name.
 131          * Returns an array-type node, or false if this is not a tree node.
 132          */
 133         function getChildrenOfType( $type );
 134
 135
 136         /**
 137          * Returns the length of the array, or false if this is not an array-type node
 138          */
 139         function getLength();
 140
 141         /**
 142          * Returns an item of an array-type node
 143          */
 144         function item( $i );
 145
 146         /**
 147          * Get the name of this node. The following names are defined here:
 148          *
 149          *    h             A heading node.
 150          *    template      A double-brace node.
 151          *    tplarg        A triple-brace node.
 152          *    title         The first argument to a template or tplarg node.
 153          *    part          Subsequent arguments to a template or tplarg node.
 154          *    #nodelist     An array-type node
 155          *
 156          * The subclass may define various other names for tree and leaf nodes.
 157          */
 158         function getName();
 159
 160         /**
 161          * Split a <part> node into an associative array containing:
 162          *    name          PPNode name
 163          *    index         String index
 164          *    value         PPNode value
 165          */
 166         function splitArg();
 167
 168         /**
 169          * Split an <ext> node into an associative array containing name, attr, inner and close
 170          * All values in the resulting array are PPNodes. Inner and close are optional.
 171          */
 172         function splitExt();
 173
 174         /**
 175          * Split an <h> node
 176          */
 177         function splitHeading();
 178 }