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//
// NSString+CSS.h
// DTCoreText
//
// Created by Oliver Drobnik on 31.01.12.
// Copyright (c) 2012 Drobnik.com. All rights reserved.
//
@class DTColor;
/**
Methods to make dealing with CSS strings easier. Extract shadows from this string, extract CSS styles found in this string, extract the pixel size of a CSS measurement relative to the current text size, and extract the CSS pixel measurement of this string.
*/
@interface NSString (CSS)
/**
Examine a string for all CSS styles that are applied to it and return a dictionary of those styles. Implemented using scanCSSAttribute: which is defined in NSScanner+HTML.h.
@returns A dictionary of strings containing the CSS styles which are applied to this string.
*/
- (NSDictionary *)dictionaryOfCSSStyles;
/**
Calculates a pixel-based length from the receiver based on the current text size in pixels. Used in DTHTMLElement.
@param textSize The current size which the CSS size is relative to.
@param textScale The factor by which absolute sizes are scaled. Set to 1.0f to keep the original value.
@returns A float that is the textSize
*/
- (CGFloat)pixelSizeOfCSSMeasureRelativeToCurrentTextSize:(CGFloat)textSize textScale:(CGFloat)textScale;
/**
Parse CSS shadow styles, consisting of color, blur, and offset, out of this string. The input string must be comma delimited in the format: <length> <length> <length>? <color>? where the third length and the color are not required per CSS shadows. To calculate the sizes of the blur and offset pixelSizeOfCSSMeasureRelativeToCurrentTextSize is used. Used in DTHTMLElement.
@param textSize In order to determine the shadow offset we need what text size it will be displayed at.
@param color Used if no shadow attribute color is found.
@returns An array of dictionaries, each of which is a shadow consisting of color, blur, and offset keys value pairs.
*/
- (NSArray *)arrayOfCSSShadowsWithCurrentTextSize:(CGFloat)textSize currentColor:(DTColor *)color;
/**
Decodes a content attribute which might contained unicode sequences.
*/
- (NSString *)stringByDecodingCSSContentAttribute;
@end
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