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70 lines
2.3 KiB
JavaScript
70 lines
2.3 KiB
JavaScript
define("dijit/_BidiSupport", ["./_WidgetBase"], function(_WidgetBase){
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/*=====
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var _WidgetBase = dijit._WidgetBase;
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====*/
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// module:
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// dijit/_BidiSupport
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// summary:
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// Module that deals with BIDI, special with the auto
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// direction if needed without changing the GUI direction.
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// Including this module will extend _WidgetBase with BIDI related methods.
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// description:
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// There's a special need for displaying BIDI text in rtl direction
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// in ltr GUI, sometimes needed auto support.
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// In creation of widget, if it's want to activate this class,
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// the widget should define the "textDir".
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_WidgetBase.extend({
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getTextDir: function(/*String*/ text){
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// summary:
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// Gets the right direction of text.
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// description:
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// If textDir is ltr or rtl returns the value.
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// If it's auto, calls to another function that responsible
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// for checking the value, and defining the direction.
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// tags:
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// protected.
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return this.textDir == "auto" ? this._checkContextual(text) : this.textDir;
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},
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_checkContextual: function(text){
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// summary:
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// Finds the first strong (directional) character, return ltr if isLatin
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// or rtl if isBidiChar.
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// tags:
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// private.
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// look for strong (directional) characters
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var fdc = /[A-Za-z\u05d0-\u065f\u066a-\u06ef\u06fa-\u07ff\ufb1d-\ufdff\ufe70-\ufefc]/.exec(text);
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// if found return the direction that defined by the character, else return widgets dir as defult.
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return fdc ? ( fdc[0] <= 'z' ? "ltr" : "rtl" ) : this.dir ? this.dir : this.isLeftToRight() ? "ltr" : "rtl";
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},
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applyTextDir: function(/*Object*/ element, /*String*/ text){
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// summary:
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// Set element.dir according to this.textDir
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// element:
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// The text element to be set. Should have dir property.
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// text:
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// Used in case this.textDir is "auto", for calculating the right transformation
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// description:
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// If textDir is ltr or rtl returns the value.
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// If it's auto, calls to another function that responsible
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// for checking the value, and defining the direction.
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// tags:
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// protected.
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var textDir = this.textDir == "auto" ? this._checkContextual(text) : this.textDir;
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// update only when there's a difference
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if(element.dir != textDir){
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element.dir = textDir;
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}
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}
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});
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return _WidgetBase;
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});
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