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/*=:project

    scalable Inman Flash Replacement (sIFR) version 3.

  =:file

    Copyright: 2006 Mark Wubben.

    Author: Mark Wubben, <http://novemberborn.net/>

  =:history

    * IFR: Shaun Inman

    * sIFR 1: Mike Davidson, Shaun Inman and Tomas Jogin

    * sIFR 2: Mike Davidson, Shaun Inman, Tomas Jogin and Mark Wubben

  =:license

    This software is licensed and provided under the CC-GNU LGPL.

    See <http://creativecommons.org/licenses/LGPL/2.1/>    

*/

import TextField.StyleSheet;

class SifrStyleSheet extends TextField.StyleSheet {

  public var fontSize;

  public var latestLeading = 0;

  public function parseCSS(cssText:String) {

    var native = new TextField.StyleSheet();

    var parsed = native.parseCSS(cssText);

    if(!parsed) return false;

    var selectors = native.getStyleNames();

    for(var i = selectors.length - 1; i >= 0; i--) {

      var selector = selectors[i];

      var nativeStyle = native.getStyle(selector);

      var style = this.getStyle(selector) || nativeStyle;

      if(style != nativeStyle) {

        for(var property in nativeStyle) style[property] = nativeStyle[property];

      }

      this.setStyle(selector, style);

    }

    return true;

  }

  // Apply leading to the textFormat. Much thanks to <http://www.blog.lessrain.com/?p=98>.

  private function applyLeading(format, leading) {

    this.latestLeading = leading;

    if(leading >= 0) {

        format.leading = leading;

        return format;

    }

    // Workaround for negative leading, which is ignored otherwise.

    var newFormat = new TextFormat(null, null, null, null, null, null, null, null, null, null, null, null, leading);

    for(var property in format) if(property != 'leading') newFormat[property] = format[property];

    return newFormat;

  }

  public function transform(style) {

    var format = super.transform(style);

    if(style.leading) format = applyLeading(format, style.leading);

    if(style.letterSpacing) format.letterSpacing = style.letterSpacing;

    // Support font sizes relative to the size of .sIFR-root.

    if(this.fontSize && style.fontSize && style.fontSize.indexOf('%')) {

      format.size = this.fontSize * parseInt(style.fontSize) / 100;

    }

    format.kerning = _root.kerning == 'true' || !(_root.kerning == 'false') || sIFR.defaultKerning;

    return format;

  }

}