/// <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";
var bracketIndex = block.IndexOf("{", StringComparison.Ordinal);
var 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 {...
var classes = block.Substring(0, bracketIndex).Split(',');
for (var i = 0; i < classes.Length; i++)
{
var className = classes[i].Trim();
if (string.IsNullOrEmpty(className)) continue;
var newblock = new Block(blockSource);
//Create media blocks if necessary
if (!MediaBlocks.ContainsKey(media)) MediaBlocks.Add(media, new Dictionary<string, Block>());
if (!MediaBlocks[media].ContainsKey(className))
{
//Create block
MediaBlocks[media].Add(className, newblock);
}
else
{
//Merge newblock and oldblock's properties
var oldblock = MediaBlocks[media][className];
foreach (var 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>
/// Applies style to all boxes in the tree
/// </summary>
private void CascadeStyles(Box startBox)
{
var someBlock = false;
foreach (var 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"))
{
var block = new Block(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(Value.GetStyleSheet(b.GetAttribute("href", string.Empty)));
}
}
CascadeStyles(b);
}
if (someBlock)
{
foreach (var box in startBox.Boxes)
{
box.Display = Css.Constants.Block;
}
}
}