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          * Get an argument to this frame by name
  70          */
  71         function getArgument( $name );
  72
  73         /**
  74          * Returns true if the infinite loop check is OK, false if a loop is detected
  75          */
  76         function loopCheck( $title );
  77
  78         /**
  79          * Return true if the frame is a template frame
  80          */
  81         function isTemplate();
  82 }
  83
  84 /**
  85  * There are three types of nodes:
  86  *     * Tree nodes, which have a name and contain other nodes as children
  87  *     * Array nodes, which also contain other nodes but aren't considered part of a tree
  88  *     * Leaf nodes, which contain the actual data
  89  *
  90  * This interface provides access to the tree structure and to the contents of array nodes,
  91  * but it does not provide access to the internal structure of leaf nodes. Access to leaf
  92  * data is provided via two means:
  93  *     * PPFrame::expand(), which provides expanded text
  94  *     * The PPNode::split*() functions, which provide metadata about certain types of tree node
  95  * @ingroup Parser
  96  */
  97 interface PPNode {
  98         /**
  99          * Get an array-type node containing the children of this node.
 100          * Returns false if this is not a tree node.
 101          */
 102         function getChildren();
 103
 104         /**
 105          * Get the first child of a tree node. False if there isn't one.
 106          */
 107         function getFirstChild();
 108
 109         /**
 110          * Get the next sibling of any node. False if there isn't one
 111          */
 112         function getNextSibling();
 113
 114         /**
 115          * Get all children of this tree node which have a given name.
 116          * Returns an array-type node, or false if this is not a tree node.
 117          */
 118         function getChildrenOfType( $type );
 119
 120
 121         /**
 122          * Returns the length of the array, or false if this is not an array-type node
 123          */
 124         function getLength();
 125
 126         /**
 127          * Returns an item of an array-type node
 128          */
 129         function item( $i );
 130
 131         /**
 132          * Get the name of this node. The following names are defined here:
 133          *
 134          *    h             A heading node.
 135          *    template      A double-brace node.
 136          *    tplarg        A triple-brace node.
 137          *    title         The first argument to a template or tplarg node.
 138          *    part          Subsequent arguments to a template or tplarg node.
 139          *    #nodelist     An array-type node
 140          *
 141          * The subclass may define various other names for tree and leaf nodes.
 142          */
 143         function getName();
 144
 145         /**
 146          * Split a <part> node into an associative array containing:
 147          *    name          PPNode name
 148          *    index         String index
 149          *    value         PPNode value
 150          */
 151         function splitArg();
 152
 153         /**
 154          * Split an <ext> node into an associative array containing name, attr, inner and close
 155          * All values in the resulting array are PPNodes. Inner and close are optional.
 156          */
 157         function splitExt();
 158
 159         /**
 160          * Split an <h> node
 161          */
 162         function splitHeading();
 163 }