/// <summary>
/// Applies style to all boxes in the tree
/// </summary>
private void CascadeStyles(CssBox startBox)
{
bool someBlock = false;
foreach (CssBox b in startBox.Boxes)
{
b.InheritStyle();
if (b.HtmlTag != null)
{
//Check if tag name matches with a defined class
if (MediaBlocks["all"].ContainsKey(b.HtmlTag.TagName))
{
MediaBlocks["all"][b.HtmlTag.TagName].AssignTo(b);
}
//Check if class="" attribute matches with a defined style
if (b.HtmlTag.HasAttribute("class") &&
MediaBlocks["all"].ContainsKey("." + b.HtmlTag.Attributes["class"]))
{
MediaBlocks["all"]["." + b.HtmlTag.Attributes["class"]].AssignTo(b);
}
b.HtmlTag.TranslateAttributes(b);
//Check for the style="" attribute
if (b.HtmlTag.HasAttribute("style"))
{
CssBlock block = new CssBlock(b.HtmlTag.Attributes["style"]);
block.AssignTo(b);
}
//Check for the <style> tag
if (b.HtmlTag.TagName.Equals("style", StringComparison.CurrentCultureIgnoreCase) &&
b.Boxes.Count == 1)
{
FeedStyleSheet(b.Boxes[0].Text);
}
//Check for the <link rel=stylesheet> tag
if (b.HtmlTag.TagName.Equals("link", StringComparison.CurrentCultureIgnoreCase) &&
b.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase))
{
FeedStyleSheet(CssValue.GetStyleSheet(b.GetAttribute("href", string.Empty)));
}
}
CascadeStyles(b);
}
if (someBlock)
{
foreach (CssBox box in startBox.Boxes)
{
box.Display = CssConstants.Block;
}
}
}
/// <summary>
/// Feeds the style with a block about the specific media.
/// When no media is specified, "all" will be used
/// </summary>
/// <param name="media"></param>
/// <param name="block"></param>
private void FeedStyleBlock(string media, string block)
{
if (string.IsNullOrEmpty(media))
{
media = "all";
}
int bracketIndex = block.IndexOf("{");
string blockSource = block.Substring(bracketIndex).Replace("{", string.Empty).Replace("}", string.Empty);
if (bracketIndex < 0)
{
return;
}
//TODO: Only supporting definitions like:
// h1, h2, h3 {...
//Support needed for definitions like:
//* {...
//h1 h2 {...
//h1 > h2 {...
//h1:before {...
//h1:hover {...
string[] classes = block.Substring(0, bracketIndex).Split(',');
for (int i = 0; i < classes.Length; i++)
{
string className = classes[i].Trim(); if (string.IsNullOrEmpty(className))
{
continue;
}
CssBlock newblock = new CssBlock(blockSource);
//Create media blocks if necessary
if (!MediaBlocks.ContainsKey(media))
{
MediaBlocks.Add(media, new Dictionary <string, CssBlock>());
}
if (!MediaBlocks[media].ContainsKey(className))
{
//Create block
MediaBlocks[media].Add(className, newblock);
}
else
{
//Merge newblock and oldblock's properties
CssBlock oldblock = MediaBlocks[media][className];
foreach (string property in newblock.Properties.Keys)
{
if (oldblock.Properties.ContainsKey(property))
{
oldblock.Properties[property] = newblock.Properties[property];
}
else
{
oldblock.Properties.Add(property, newblock.Properties[property]);
}
}
oldblock.UpdatePropertyValues();
}
}
}
/// <summary>
/// Feeds the style with a block about the specific media.
/// When no media is specified, "all" will be used
/// </summary>
/// <param name="media"></param>
/// <param name="block"></param>
private void FeedStyleBlock(string media, string block)
{
if (string.IsNullOrEmpty(media)) media = "all";
int bracketIndex = block.IndexOf("{");
string blockSource = block.Substring(bracketIndex).Replace("{", string.Empty).Replace("}", string.Empty);
if (bracketIndex < 0) return;
///TODO: Only supporting definitions like:
/// h1, h2, h3 {...
///Support needed for definitions like:
///* {...
///h1 h2 {...
///h1 > h2 {...
///h1:before {...
///h1:hover {...
string[] classes = block.Substring(0, bracketIndex).Split(',');
for (int i = 0; i < classes.Length; i++)
{
string className = classes[i].Trim(); if(string.IsNullOrEmpty(className)) continue;
CssBlock newblock = new CssBlock(blockSource);
//Create media blocks if necessary
if (!MediaBlocks.ContainsKey(media)) MediaBlocks.Add(media, new Dictionary<string, CssBlock>());
if (!MediaBlocks[media].ContainsKey(className))
{
//Create block
MediaBlocks[media].Add(className, newblock);
}
else
{
//Merge newblock and oldblock's properties
CssBlock oldblock = MediaBlocks[media][className];
foreach (string property in newblock.Properties.Keys)
{
if (oldblock.Properties.ContainsKey(property))
{
oldblock.Properties[property] = newblock.Properties[property];
}
else
{
oldblock.Properties.Add(property, newblock.Properties[property]);
}
}
oldblock.UpdatePropertyValues();
}
}
}