/// <summary> /// Applies style to all boxes in the tree.<br/> /// If the html tag has style defined for each apply that style to the css box of the tag.<br/> /// If the html tag has "class" attribute and the class name has style defined apply that style on the tag css box.<br/> /// If the html tag has "style" attribute parse it and apply the parsed style on the tag css box.<br/> /// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/> /// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/> /// </summary> /// <param name="box"></param> /// <param name="htmlContainer">the html container to use for reference resolve</param> /// <param name="cssData"> </param> /// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param> private static void CascadeStyles(CssBox box, HtmlContainer htmlContainer, ref CssData cssData, ref bool cssDataChanged) { box.InheritStyle(); if (box.HtmlTag != null) { // try assign style using the html element tag AssignCssBlocks(box, cssData, box.HtmlTag.Name); // try assign style using the "class" attribute of the html element if (box.HtmlTag.HasAttribute("class")) { AssignClassCssBlocks(box, cssData); } // try assign style using the "id" attribute of the html element if (box.HtmlTag.HasAttribute("id")) { var id = box.HtmlTag.TryGetAttribute("id"); AssignCssBlocks(box, cssData, "#" + id); } TranslateAttributes(box.HtmlTag, box); // Check for the style="" attribute if (box.HtmlTag.HasAttribute("style")) { var block = CssParser.ParseCssBlock(box.HtmlTag.Name, box.HtmlTag.TryGetAttribute("style")); AssignCssBlock(box, block); } // Check for the <style> tag if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1) { CloneCssData(ref cssData, ref cssDataChanged); CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text.CutSubstring()); } // Check for the <link rel=stylesheet> tag if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) && box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase)) { CloneCssData(ref cssData, ref cssDataChanged); var styleSheet = StylesheetLoadHelper.LoadStylesheet(htmlContainer, box.GetAttribute("href", string.Empty), box.HtmlTag.Attributes); CssParser.ParseStyleSheet(cssData, styleSheet); } } foreach (var childBox in box.Boxes) { CascadeStyles(childBox, htmlContainer, ref cssData, ref cssDataChanged); } }
/// <summary> /// Applies style to all boxes in the tree.<br/> /// If the html tag has style defined for each apply that style to the css box of the tag.<br/> /// If the html tag has "class" attribute and the class name has style defined apply that style on the tag css box.<br/> /// If the html tag has "style" attribute parse it and apply the parsed style on the tag css box.<br/> /// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/> /// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/> /// </summary> /// <param name="box"></param> /// <param name="htmlContainer">the html container to use for reference resolve</param> /// <param name="cssData"> </param> /// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param> private static void CascadeStyles(CssBox box, HtmlContainer htmlContainer, ref CssData cssData, ref bool cssDataChanged) { box.InheritStyle(); if (box.HtmlTag != null) { // try assign style using the html element tag AssignCssBlocks(box, cssData, box.HtmlTag.Name); // try assign style using the "class" attribute of the html element if (box.HtmlTag.HasAttribute("class")) { AssignClassCssBlocks(box, cssData); } // try assign style using the "id" attribute of the html element if (box.HtmlTag.HasAttribute("id")) { var id = box.HtmlTag.TryGetAttribute("id"); AssignCssBlocks(box, cssData, "#" + id); } TranslateAttributes(box.HtmlTag, box); // Check for the style="" attribute if (box.HtmlTag.HasAttribute("style")) { var block = CssParser.ParseCssBlock(box.HtmlTag.Name, box.HtmlTag.TryGetAttribute("style")); AssignCssBlock(box, block); } // Check for the <style> tag if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1) { CloneCssData(ref cssData, ref cssDataChanged); CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text.CutSubstring()); } // Check for the <link rel=stylesheet> tag if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) && box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase)) { CloneCssData(ref cssData, ref cssDataChanged); string stylesheet; CssData stylesheetData; StylesheetLoadHandler.LoadStylesheet(htmlContainer, box.GetAttribute("href", string.Empty), box.HtmlTag.Attributes, out stylesheet, out stylesheetData); if (stylesheet != null) { CssParser.ParseStyleSheet(cssData, stylesheet); } else if (stylesheetData != null) { cssData.Combine(stylesheetData); } } } // cascade text decoration only to boxes that actually have text so it will be handled correctly. if (box.TextDecoration != String.Empty && box.Text == null) { foreach (var childBox in box.Boxes) { childBox.TextDecoration = box.TextDecoration; } box.TextDecoration = string.Empty; } foreach (var childBox in box.Boxes) { CascadeStyles(childBox, htmlContainer, ref cssData, ref cssDataChanged); } }