919 lines
37 KiB
C#
919 lines
37 KiB
C#
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// "Therefore those skilled at the unorthodox
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// are infinite as heaven and earth,
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// inexhaustible as the great rivers.
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// When they come to an end,
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// they begin again,
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// like the days and months;
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// they die and are reborn,
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// like the four seasons."
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//
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// - Sun Tsu,
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// "The Art of War"
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using System;
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using System.Collections.Generic;
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using System.Text;
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using TheArtOfDev.HtmlRenderer.Adapters.Entities;
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using TheArtOfDev.HtmlRenderer.Core.Dom;
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using TheArtOfDev.HtmlRenderer.Core.Entities;
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using TheArtOfDev.HtmlRenderer.Core.Parse;
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namespace TheArtOfDev.HtmlRenderer.Core.Utils
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{
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/// <summary>
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/// Utility class for traversing DOM structure and execution stuff on it.
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/// </summary>
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internal sealed class DomUtils
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{
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/// <summary>
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/// Check if the given location is inside the given box deep.<br/>
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/// Check inner boxes and all lines that the given box spans to.
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/// </summary>
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/// <param name="box">the box to check</param>
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/// <param name="location">the location to check</param>
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/// <returns>true - location inside the box, false - otherwise</returns>
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public static bool IsInBox(CssBox box, RPoint location)
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{
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foreach (var line in box.Rectangles)
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{
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if (line.Value.Contains(location))
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return true;
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}
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foreach (var childBox in box.Boxes)
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{
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if (IsInBox(childBox, location))
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return true;
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}
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return false;
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}
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/// <summary>
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/// Check if the given box contains only inline child boxes.
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/// </summary>
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/// <param name="box">the box to check</param>
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/// <returns>true - only inline child boxes, false - otherwise</returns>
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public static bool ContainsInlinesOnly(CssBox box)
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{
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foreach (CssBox b in box.Boxes)
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{
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if (!b.IsInline)
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{
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return false;
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}
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}
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return true;
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}
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/// <summary>
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/// Recursively searches for the parent with the specified HTML Tag name
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/// </summary>
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/// <param name="root"></param>
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/// <param name="tagName"></param>
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/// <param name="box"></param>
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public static CssBox FindParent(CssBox root, string tagName, CssBox box)
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{
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if (box == null)
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{
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return root;
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}
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else if (box.HtmlTag != null && box.HtmlTag.Name.Equals(tagName, StringComparison.CurrentCultureIgnoreCase))
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{
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return box.ParentBox ?? root;
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}
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else
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{
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return FindParent(root, tagName, box.ParentBox);
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}
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}
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/// <summary>
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/// Gets the previous sibling of this box.
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/// </summary>
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/// <returns>Box before this one on the tree. Null if its the first</returns>
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public static CssBox GetPreviousSibling(CssBox b)
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{
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if (b.ParentBox != null)
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{
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int index = b.ParentBox.Boxes.IndexOf(b);
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if (index > 0)
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{
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int diff = 1;
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CssBox sib = b.ParentBox.Boxes[index - diff];
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while ((sib.Display == CssConstants.None || sib.Position == CssConstants.Absolute) && index - diff - 1 >= 0)
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{
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sib = b.ParentBox.Boxes[index - ++diff];
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}
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return sib.Display == CssConstants.None ? null : sib;
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}
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}
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return null;
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}
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/// <summary>
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/// Gets the previous sibling of this box.
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/// </summary>
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/// <returns>Box before this one on the tree. Null if its the first</returns>
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public static CssBox GetPreviousContainingBlockSibling(CssBox b)
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{
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var conBlock = b;
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int index = conBlock.ParentBox.Boxes.IndexOf(conBlock);
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while (conBlock.ParentBox != null && index < 1 && conBlock.Display != CssConstants.Block && conBlock.Display != CssConstants.Table && conBlock.Display != CssConstants.TableCell && conBlock.Display != CssConstants.ListItem)
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{
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conBlock = conBlock.ParentBox;
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index = conBlock.ParentBox != null ? conBlock.ParentBox.Boxes.IndexOf(conBlock) : -1;
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}
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conBlock = conBlock.ParentBox;
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if (conBlock != null && index > 0)
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{
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int diff = 1;
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CssBox sib = conBlock.Boxes[index - diff];
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while ((sib.Display == CssConstants.None || sib.Position == CssConstants.Absolute) && index - diff - 1 >= 0)
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{
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sib = conBlock.Boxes[index - ++diff];
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}
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return sib.Display == CssConstants.None ? null : sib;
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}
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return null;
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}
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/// <summary>
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/// fix word space for first word in inline tag.
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/// </summary>
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/// <param name="box">the box to check</param>
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public static bool IsBoxHasWhitespace(CssBox box)
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{
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if (!box.Words[0].IsImage && box.Words[0].HasSpaceBefore && box.IsInline)
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{
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var sib = GetPreviousContainingBlockSibling(box);
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if (sib != null && sib.IsInline)
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return true;
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}
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return false;
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}
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/// <summary>
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/// Gets the next sibling of this box.
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/// </summary>
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/// <returns>Box before this one on the tree. Null if its the first</returns>
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public static CssBox GetNextSibling(CssBox b)
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{
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CssBox sib = null;
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if (b.ParentBox != null)
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{
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var index = b.ParentBox.Boxes.IndexOf(b) + 1;
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while (index <= b.ParentBox.Boxes.Count - 1)
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{
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var pSib = b.ParentBox.Boxes[index];
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if (pSib.Display != CssConstants.None && pSib.Position != CssConstants.Absolute)
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{
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sib = pSib;
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break;
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}
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index++;
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}
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}
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return sib;
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}
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/// <summary>
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/// Get attribute value by given key starting search from given box, search up the tree until
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/// attribute found or root.
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/// </summary>
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/// <param name="box">the box to start lookup at</param>
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/// <param name="attribute">the attribute to get</param>
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/// <returns>the value of the attribute or null if not found</returns>
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public static string GetAttribute(CssBox box, string attribute)
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{
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string value = null;
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while (box != null && value == null)
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{
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value = box.GetAttribute(attribute, null);
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box = box.ParentBox;
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}
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return value;
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}
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/// <summary>
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/// Get css box under the given sub-tree at the given x,y location, get the inner most.<br/>
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/// the location must be in correct scroll offset.
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/// </summary>
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/// <param name="box">the box to start search from</param>
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/// <param name="location">the location to find the box by</param>
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/// <param name="visible">Optional: if to get only visible boxes (default - true)</param>
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/// <returns>css link box if exists or null</returns>
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public static CssBox GetCssBox(CssBox box, RPoint location, bool visible = true)
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{
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if (box != null)
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{
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if ((!visible || box.Visibility == CssConstants.Visible) && (box.Bounds.IsEmpty || box.Bounds.Contains(location)))
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{
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foreach (var childBox in box.Boxes)
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{
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if (CommonUtils.GetFirstValueOrDefault(box.Rectangles, box.Bounds).Contains(location))
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{
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return GetCssBox(childBox, location) ?? childBox;
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}
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}
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}
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}
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return null;
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}
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/// <summary>
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/// Collect all link boxes found in the HTML tree.
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/// </summary>
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/// <param name="box">the box to start search from</param>
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/// <param name="linkBoxes">collection to add all link boxes to</param>
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public static void GetAllLinkBoxes(CssBox box, List<CssBox> linkBoxes)
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{
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if (box != null)
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{
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if (box.IsClickable && box.Visibility == CssConstants.Visible)
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{
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linkBoxes.Add(box);
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}
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foreach (var childBox in box.Boxes)
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{
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GetAllLinkBoxes(childBox, linkBoxes);
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}
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}
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}
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/// <summary>
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/// Get css link box under the given sub-tree at the given x,y location.<br/>
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/// the location must be in correct scroll offset.
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/// </summary>
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/// <param name="box">the box to start search from</param>
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/// <param name="location">the location to find the box by</param>
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/// <returns>css link box if exists or null</returns>
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public static CssBox GetLinkBox(CssBox box, RPoint location)
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{
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if (box != null)
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{
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if (box.IsClickable && box.Visibility == CssConstants.Visible)
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{
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if (IsInBox(box, location))
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return box;
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}
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if (box.ClientRectangle.IsEmpty || box.ClientRectangle.Contains(location))
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{
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foreach (var childBox in box.Boxes)
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{
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var foundBox = GetLinkBox(childBox, location);
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if (foundBox != null)
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return foundBox;
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}
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}
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}
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return null;
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}
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/// <summary>
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/// Get css box under the given sub-tree with the given id.<br/>
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/// </summary>
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/// <param name="box">the box to start search from</param>
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/// <param name="id">the id to find the box by</param>
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/// <returns>css box if exists or null</returns>
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public static CssBox GetBoxById(CssBox box, string id)
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{
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if (box != null && !string.IsNullOrEmpty(id))
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{
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if (box.HtmlTag != null && id.Equals(box.HtmlTag.TryGetAttribute("id"), StringComparison.OrdinalIgnoreCase))
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{
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return box;
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}
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foreach (var childBox in box.Boxes)
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{
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var foundBox = GetBoxById(childBox, id);
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if (foundBox != null)
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return foundBox;
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}
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|||
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}
|
|||
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|
|||
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return null;
|
|||
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}
|
|||
|
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|||
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/// <summary>
|
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/// Get css line box under the given sub-tree at the given y location or the nearest line from the top.<br/>
|
|||
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/// the location must be in correct scroll offset.
|
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/// </summary>
|
|||
|
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/// <param name="box">the box to start search from</param>
|
|||
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/// <param name="location">the location to find the box at</param>
|
|||
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/// <returns>css word box if exists or null</returns>
|
|||
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public static CssLineBox GetCssLineBox(CssBox box, RPoint location)
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{
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CssLineBox line = null;
|
|||
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if (box != null)
|
|||
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{
|
|||
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if (box.LineBoxes.Count > 0)
|
|||
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{
|
|||
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if (box.HtmlTag == null || box.HtmlTag.Name != "td" || box.Bounds.Contains(location))
|
|||
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{
|
|||
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foreach (var lineBox in box.LineBoxes)
|
|||
|
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{
|
|||
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foreach (var rect in lineBox.Rectangles)
|
|||
|
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{
|
|||
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if (rect.Value.Top <= location.Y)
|
|||
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{
|
|||
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line = lineBox;
|
|||
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}
|
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|
|||
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if (rect.Value.Top > location.Y)
|
|||
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{
|
|||
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return line;
|
|||
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}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
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foreach (var childBox in box.Boxes)
|
|||
|
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{
|
|||
|
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line = GetCssLineBox(childBox, location) ?? line;
|
|||
|
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}
|
|||
|
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}
|
|||
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|
|||
|
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return line;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Get css word box under the given sub-tree at the given x,y location.<br/>
|
|||
|
|
/// the location must be in correct scroll offset.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="box">the box to start search from</param>
|
|||
|
|
/// <param name="location">the location to find the box at</param>
|
|||
|
|
/// <returns>css word box if exists or null</returns>
|
|||
|
|
public static CssRect GetCssBoxWord(CssBox box, RPoint location)
|
|||
|
|
{
|
|||
|
|
if (box != null && box.Visibility == CssConstants.Visible)
|
|||
|
|
{
|
|||
|
|
if (box.LineBoxes.Count > 0)
|
|||
|
|
{
|
|||
|
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foreach (var lineBox in box.LineBoxes)
|
|||
|
|
{
|
|||
|
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var wordBox = GetCssBoxWord(lineBox, location);
|
|||
|
|
if (wordBox != null)
|
|||
|
|
return wordBox;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
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|
|||
|
|
if (box.ClientRectangle.IsEmpty || box.ClientRectangle.Contains(location))
|
|||
|
|
{
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
var foundWord = GetCssBoxWord(childBox, location);
|
|||
|
|
if (foundWord != null)
|
|||
|
|
{
|
|||
|
|
return foundWord;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Get css word box under the given sub-tree at the given x,y location.<br/>
|
|||
|
|
/// the location must be in correct scroll offset.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="lineBox">the line box to search in</param>
|
|||
|
|
/// <param name="location">the location to find the box at</param>
|
|||
|
|
/// <returns>css word box if exists or null</returns>
|
|||
|
|
public static CssRect GetCssBoxWord(CssLineBox lineBox, RPoint location)
|
|||
|
|
{
|
|||
|
|
foreach (var rects in lineBox.Rectangles)
|
|||
|
|
{
|
|||
|
|
foreach (var word in rects.Key.Words)
|
|||
|
|
{
|
|||
|
|
// add word spacing to word width so sentence won't have hols in it when moving the mouse
|
|||
|
|
var rect = word.Rectangle;
|
|||
|
|
rect.Width += word.OwnerBox.ActualWordSpacing;
|
|||
|
|
if (rect.Contains(location))
|
|||
|
|
{
|
|||
|
|
return word;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Find the css line box that the given word is in.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="word">the word to search for it's line box</param>
|
|||
|
|
/// <returns>line box that the word is in</returns>
|
|||
|
|
public static CssLineBox GetCssLineBoxByWord(CssRect word)
|
|||
|
|
{
|
|||
|
|
var box = word.OwnerBox;
|
|||
|
|
while (box.LineBoxes.Count == 0)
|
|||
|
|
{
|
|||
|
|
box = box.ParentBox;
|
|||
|
|
}
|
|||
|
|
foreach (var lineBox in box.LineBoxes)
|
|||
|
|
{
|
|||
|
|
foreach (var lineWord in lineBox.Words)
|
|||
|
|
{
|
|||
|
|
if (lineWord == word)
|
|||
|
|
{
|
|||
|
|
return lineBox;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return box.LineBoxes[0];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Get selected plain text of the given html sub-tree.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="root">the DOM box to get selected text from its sub-tree</param>
|
|||
|
|
/// <returns>the selected plain text string</returns>
|
|||
|
|
public static string GetSelectedPlainText(CssBox root)
|
|||
|
|
{
|
|||
|
|
var sb = new StringBuilder();
|
|||
|
|
var lastWordIndex = GetSelectedPlainText(sb, root);
|
|||
|
|
return sb.ToString(0, lastWordIndex).Trim();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Generate html from the given DOM tree.<br/>
|
|||
|
|
/// Generate all the style inside the html, in header or for every tag depending on <paramref name="styleGen"/> value.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="root">the box of the html generate html from</param>
|
|||
|
|
/// <param name="styleGen">Optional: controls the way styles are generated when html is generated</param>
|
|||
|
|
/// <param name="onlySelected">Optional: true - generate only selected html subset, false - generate all (default - false)</param>
|
|||
|
|
/// <returns>generated html</returns>
|
|||
|
|
public static string GenerateHtml(CssBox root, HtmlGenerationStyle styleGen = HtmlGenerationStyle.Inline, bool onlySelected = false)
|
|||
|
|
{
|
|||
|
|
var sb = new StringBuilder();
|
|||
|
|
if (root != null)
|
|||
|
|
{
|
|||
|
|
var selectedBoxes = onlySelected ? CollectSelectedBoxes(root) : null;
|
|||
|
|
var selectionRoot = onlySelected ? GetSelectionRoot(root, selectedBoxes) : null;
|
|||
|
|
WriteHtml(root.HtmlContainer.CssParser, sb, root, styleGen, selectedBoxes, selectionRoot);
|
|||
|
|
}
|
|||
|
|
return sb.ToString();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Generate textual tree representation of the css boxes tree starting from the given root.<br/>
|
|||
|
|
/// Used for debugging html parsing.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="root">the root to generate tree from</param>
|
|||
|
|
/// <returns>generated tree</returns>
|
|||
|
|
public static string GenerateBoxTree(CssBox root)
|
|||
|
|
{
|
|||
|
|
var sb = new StringBuilder();
|
|||
|
|
GenerateBoxTree(root, sb, 0);
|
|||
|
|
return sb.ToString();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
#region Private methods
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Get selected plain text of the given html sub-tree.<br/>
|
|||
|
|
/// Append all the selected words.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="sb">the builder to append the selected text to</param>
|
|||
|
|
/// <param name="box">the DOM box to get selected text from its sub-tree</param>
|
|||
|
|
/// <returns>the index of the last word appended</returns>
|
|||
|
|
private static int GetSelectedPlainText(StringBuilder sb, CssBox box)
|
|||
|
|
{
|
|||
|
|
int lastWordIndex = 0;
|
|||
|
|
foreach (var boxWord in box.Words)
|
|||
|
|
{
|
|||
|
|
// append the text of selected word (handle partial selected words)
|
|||
|
|
if (boxWord.Selected)
|
|||
|
|
{
|
|||
|
|
sb.Append(GetSelectedWord(boxWord, true));
|
|||
|
|
lastWordIndex = sb.Length;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// empty span box
|
|||
|
|
if (box.Boxes.Count < 1 && box.Text != null && box.Text.IsWhitespace())
|
|||
|
|
{
|
|||
|
|
sb.Append(' ');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// deep traversal
|
|||
|
|
if (box.Visibility != CssConstants.Hidden && box.Display != CssConstants.None)
|
|||
|
|
{
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
var innerLastWordIdx = GetSelectedPlainText(sb, childBox);
|
|||
|
|
lastWordIndex = Math.Max(lastWordIndex, innerLastWordIdx);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (sb.Length > 0)
|
|||
|
|
{
|
|||
|
|
// convert hr to line of dashes
|
|||
|
|
if (box.HtmlTag != null && box.HtmlTag.Name == "hr")
|
|||
|
|
{
|
|||
|
|
if (sb.Length > 1 && sb[sb.Length - 1] != '\n')
|
|||
|
|
sb.AppendLine();
|
|||
|
|
sb.AppendLine(new string('-', 80));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// new line for css block
|
|||
|
|
if (box.Display == CssConstants.Block || box.Display == CssConstants.ListItem || box.Display == CssConstants.TableRow)
|
|||
|
|
{
|
|||
|
|
if (!(box.IsBrElement && sb.Length > 1 && sb[sb.Length - 1] == '\n'))
|
|||
|
|
sb.AppendLine();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// space between table cells
|
|||
|
|
if (box.Display == CssConstants.TableCell)
|
|||
|
|
{
|
|||
|
|
sb.Append(' ');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// paragraphs has additional newline for nice formatting
|
|||
|
|
if (box.HtmlTag != null && box.HtmlTag.Name == "p")
|
|||
|
|
{
|
|||
|
|
int newlines = 0;
|
|||
|
|
for (int i = sb.Length - 1; i >= 0 && char.IsWhiteSpace(sb[i]); i--)
|
|||
|
|
newlines += sb[i] == '\n' ? 1 : 0;
|
|||
|
|
if (newlines < 2)
|
|||
|
|
sb.AppendLine();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return lastWordIndex;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Collect the boxes that have at least one word down the hierarchy that is selected recursively.<br/>
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="root">the box to check its sub-tree</param>
|
|||
|
|
/// <returns>the collection to add the selected tags to</returns>
|
|||
|
|
private static Dictionary<CssBox, bool> CollectSelectedBoxes(CssBox root)
|
|||
|
|
{
|
|||
|
|
var selectedBoxes = new Dictionary<CssBox, bool>();
|
|||
|
|
var maybeBoxes = new Dictionary<CssBox, bool>();
|
|||
|
|
CollectSelectedBoxes(root, selectedBoxes, maybeBoxes);
|
|||
|
|
return selectedBoxes;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Collect the boxes that have at least one word down the hierarchy that is selected recursively.<br/>
|
|||
|
|
/// Use <paramref name="maybeBoxes"/> to handle boxes that are between selected words but don't have selected word inside.<br/>
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="box">the box to check its sub-tree</param>
|
|||
|
|
/// <param name="selectedBoxes">the hash to add the selected boxes to</param>
|
|||
|
|
/// <param name="maybeBoxes">used to handle boxes that are between selected words but don't have selected word inside</param>
|
|||
|
|
/// <returns>is the current box is in selected sub-tree</returns>
|
|||
|
|
private static bool CollectSelectedBoxes(CssBox box, Dictionary<CssBox, bool> selectedBoxes, Dictionary<CssBox, bool> maybeBoxes)
|
|||
|
|
{
|
|||
|
|
bool isInSelection = false;
|
|||
|
|
foreach (var word in box.Words)
|
|||
|
|
{
|
|||
|
|
if (word.Selected)
|
|||
|
|
{
|
|||
|
|
selectedBoxes[box] = true;
|
|||
|
|
foreach (var maybeTag in maybeBoxes)
|
|||
|
|
selectedBoxes[maybeTag.Key] = maybeTag.Value;
|
|||
|
|
maybeBoxes.Clear();
|
|||
|
|
isInSelection = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
var childInSelection = CollectSelectedBoxes(childBox, selectedBoxes, maybeBoxes);
|
|||
|
|
if (childInSelection)
|
|||
|
|
{
|
|||
|
|
selectedBoxes[box] = true;
|
|||
|
|
isInSelection = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (box.HtmlTag != null && selectedBoxes.Count > 0)
|
|||
|
|
{
|
|||
|
|
maybeBoxes[box] = true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return isInSelection;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// find the box the is the root of selected boxes (the first box to contain multiple selected boxes)
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="root">the root of the boxes tree</param>
|
|||
|
|
/// <param name="selectedBoxes">the selected boxes to find selection root in</param>
|
|||
|
|
/// <returns>the box that is the root of selected boxes</returns>
|
|||
|
|
private static CssBox GetSelectionRoot(CssBox root, Dictionary<CssBox, bool> selectedBoxes)
|
|||
|
|
{
|
|||
|
|
var selectionRoot = root;
|
|||
|
|
var selectionRootRun = root;
|
|||
|
|
while (true)
|
|||
|
|
{
|
|||
|
|
bool foundRoot = false;
|
|||
|
|
CssBox selectedChild = null;
|
|||
|
|
foreach (var childBox in selectionRootRun.Boxes)
|
|||
|
|
{
|
|||
|
|
if (selectedBoxes.ContainsKey(childBox))
|
|||
|
|
{
|
|||
|
|
if (selectedChild != null)
|
|||
|
|
{
|
|||
|
|
foundRoot = true;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
selectedChild = childBox;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (foundRoot || selectedChild == null)
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
selectionRootRun = selectedChild;
|
|||
|
|
|
|||
|
|
// the actual selection root must be a box with html tag
|
|||
|
|
if (selectionRootRun.HtmlTag != null)
|
|||
|
|
selectionRoot = selectionRootRun;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// if the selection root doesn't contained any named boxes in it then we must go one level up, otherwise we will miss the selection root box formatting
|
|||
|
|
if (!ContainsNamedBox(selectionRoot))
|
|||
|
|
{
|
|||
|
|
selectionRootRun = selectionRoot.ParentBox;
|
|||
|
|
while (selectionRootRun.ParentBox != null && selectionRootRun.HtmlTag == null)
|
|||
|
|
selectionRootRun = selectionRootRun.ParentBox;
|
|||
|
|
|
|||
|
|
if (selectionRootRun.HtmlTag != null)
|
|||
|
|
selectionRoot = selectionRootRun;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return selectionRoot;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Check if the given box has a names child box (has html tag) recursively.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="box">the box to check</param>
|
|||
|
|
/// <returns>true - in sub-tree there is a named box, false - otherwise</returns>
|
|||
|
|
private static bool ContainsNamedBox(CssBox box)
|
|||
|
|
{
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
if (childBox.HtmlTag != null || ContainsNamedBox(childBox))
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Write the given html DOM sub-tree into the given string builder.<br/>
|
|||
|
|
/// If <paramref name="selectedBoxes"/> are given write html only from those tags.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="cssParser">used to parse CSS data</param>
|
|||
|
|
/// <param name="sb">the string builder to write html into</param>
|
|||
|
|
/// <param name="box">the html sub-tree to write</param>
|
|||
|
|
/// <param name="styleGen">Controls the way styles are generated when html is generated</param>
|
|||
|
|
/// <param name="selectedBoxes">Control if to generate only selected boxes, if given only boxes found in hash will be generated</param>
|
|||
|
|
/// <param name="selectionRoot">the box the is the root of selected boxes (the first box to contain multiple selected boxes)</param>
|
|||
|
|
private static void WriteHtml(CssParser cssParser, StringBuilder sb, CssBox box, HtmlGenerationStyle styleGen, Dictionary<CssBox, bool> selectedBoxes, CssBox selectionRoot)
|
|||
|
|
{
|
|||
|
|
if (box.HtmlTag == null || selectedBoxes == null || selectedBoxes.ContainsKey(box))
|
|||
|
|
{
|
|||
|
|
if (box.HtmlTag != null)
|
|||
|
|
{
|
|||
|
|
if (box.HtmlTag.Name != "link" || !box.HtmlTag.Attributes.ContainsKey("href") ||
|
|||
|
|
(!box.HtmlTag.Attributes["href"].StartsWith("property") && !box.HtmlTag.Attributes["href"].StartsWith("method")))
|
|||
|
|
{
|
|||
|
|
WriteHtmlTag(cssParser, sb, box, styleGen);
|
|||
|
|
if (box == selectionRoot)
|
|||
|
|
sb.Append("<!--StartFragment-->");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (styleGen == HtmlGenerationStyle.InHeader && box.HtmlTag.Name == "html" && box.HtmlContainer.CssData != null)
|
|||
|
|
{
|
|||
|
|
sb.AppendLine("<head>");
|
|||
|
|
WriteStylesheet(sb, box.HtmlContainer.CssData);
|
|||
|
|
sb.AppendLine("</head>");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (box.Words.Count > 0)
|
|||
|
|
{
|
|||
|
|
foreach (var word in box.Words)
|
|||
|
|
{
|
|||
|
|
if (selectedBoxes == null || word.Selected)
|
|||
|
|
{
|
|||
|
|
var wordText = GetSelectedWord(word, selectedBoxes != null);
|
|||
|
|
sb.Append(HtmlUtils.EncodeHtml(wordText));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
WriteHtml(cssParser, sb, childBox, styleGen, selectedBoxes, selectionRoot);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (box.HtmlTag != null && !box.HtmlTag.IsSingle)
|
|||
|
|
{
|
|||
|
|
if (box == selectionRoot)
|
|||
|
|
sb.Append("<!--EndFragment-->");
|
|||
|
|
sb.AppendFormat("</{0}>", box.HtmlTag.Name);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Write the given html tag with all its attributes and styles.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="cssParser">used to parse CSS data</param>
|
|||
|
|
/// <param name="sb">the string builder to write html into</param>
|
|||
|
|
/// <param name="box">the css box with the html tag to write</param>
|
|||
|
|
/// <param name="styleGen">Controls the way styles are generated when html is generated</param>
|
|||
|
|
private static void WriteHtmlTag(CssParser cssParser, StringBuilder sb, CssBox box, HtmlGenerationStyle styleGen)
|
|||
|
|
{
|
|||
|
|
sb.AppendFormat("<{0}", box.HtmlTag.Name);
|
|||
|
|
|
|||
|
|
// collect all element style properties including from stylesheet
|
|||
|
|
var tagStyles = new Dictionary<string, string>();
|
|||
|
|
var tagCssBlock = box.HtmlContainer.CssData.GetCssBlock(box.HtmlTag.Name);
|
|||
|
|
if (tagCssBlock != null)
|
|||
|
|
{
|
|||
|
|
// TODO:a handle selectors
|
|||
|
|
foreach (var cssBlock in tagCssBlock)
|
|||
|
|
foreach (var prop in cssBlock.Properties)
|
|||
|
|
tagStyles[prop.Key] = prop.Value;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (box.HtmlTag.HasAttributes())
|
|||
|
|
{
|
|||
|
|
sb.Append(" ");
|
|||
|
|
foreach (var att in box.HtmlTag.Attributes)
|
|||
|
|
{
|
|||
|
|
// handle image tags by inserting the image using base64 data
|
|||
|
|
if (styleGen == HtmlGenerationStyle.Inline && att.Key == HtmlConstants.Style)
|
|||
|
|
{
|
|||
|
|
// if inline style add the styles to the collection
|
|||
|
|
var block = cssParser.ParseCssBlock(box.HtmlTag.Name, box.HtmlTag.TryGetAttribute("style"));
|
|||
|
|
foreach (var prop in block.Properties)
|
|||
|
|
tagStyles[prop.Key] = prop.Value;
|
|||
|
|
}
|
|||
|
|
else if (styleGen == HtmlGenerationStyle.Inline && att.Key == HtmlConstants.Class)
|
|||
|
|
{
|
|||
|
|
// if inline style convert the style class to actual properties and add to collection
|
|||
|
|
var cssBlocks = box.HtmlContainer.CssData.GetCssBlock("." + att.Value);
|
|||
|
|
if (cssBlocks != null)
|
|||
|
|
{
|
|||
|
|
// TODO:a handle selectors
|
|||
|
|
foreach (var cssBlock in cssBlocks)
|
|||
|
|
foreach (var prop in cssBlock.Properties)
|
|||
|
|
tagStyles[prop.Key] = prop.Value;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
sb.AppendFormat("{0}=\"{1}\" ", att.Key, att.Value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
sb.Remove(sb.Length - 1, 1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// if inline style insert the style tag with all collected style properties
|
|||
|
|
if (styleGen == HtmlGenerationStyle.Inline && tagStyles.Count > 0)
|
|||
|
|
{
|
|||
|
|
var cleanTagStyles = StripDefaultStyles(box, tagStyles);
|
|||
|
|
if (cleanTagStyles.Count > 0)
|
|||
|
|
{
|
|||
|
|
sb.Append(" style=\"");
|
|||
|
|
foreach (var style in cleanTagStyles)
|
|||
|
|
sb.AppendFormat("{0}: {1}; ", style.Key, style.Value);
|
|||
|
|
sb.Remove(sb.Length - 1, 1);
|
|||
|
|
sb.Append("\"");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
sb.AppendFormat("{0}>", box.HtmlTag.IsSingle ? "/" : "");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Clean the given style collection by removing default styles so only custom styles remain.<br/>
|
|||
|
|
/// Return new collection where the old remains unchanged.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="box">the box the styles apply to, used to know the default style</param>
|
|||
|
|
/// <param name="tagStyles">the collection of styles to clean</param>
|
|||
|
|
/// <returns>new cleaned styles collection</returns>
|
|||
|
|
private static Dictionary<string, string> StripDefaultStyles(CssBox box, Dictionary<string, string> tagStyles)
|
|||
|
|
{
|
|||
|
|
// ReSharper disable PossibleMultipleEnumeration
|
|||
|
|
var cleanTagStyles = new Dictionary<string, string>();
|
|||
|
|
var defaultBlocks = box.HtmlContainer.Adapter.DefaultCssData.GetCssBlock(box.HtmlTag.Name);
|
|||
|
|
foreach (var style in tagStyles)
|
|||
|
|
{
|
|||
|
|
bool isDefault = false;
|
|||
|
|
foreach (var defaultBlock in defaultBlocks)
|
|||
|
|
{
|
|||
|
|
string value;
|
|||
|
|
if (defaultBlock.Properties.TryGetValue(style.Key, out value) && value.Equals(style.Value, StringComparison.OrdinalIgnoreCase))
|
|||
|
|
{
|
|||
|
|
isDefault = true;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!isDefault)
|
|||
|
|
cleanTagStyles[style.Key] = style.Value;
|
|||
|
|
}
|
|||
|
|
return cleanTagStyles;
|
|||
|
|
// ReSharper restore PossibleMultipleEnumeration
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Write stylesheet data inline into the html.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="sb">the string builder to write stylesheet into</param>
|
|||
|
|
/// <param name="cssData">the css data to write to the head</param>
|
|||
|
|
private static void WriteStylesheet(StringBuilder sb, CssData cssData)
|
|||
|
|
{
|
|||
|
|
sb.AppendLine("<style type=\"text/css\">");
|
|||
|
|
foreach (var cssBlocks in cssData.MediaBlocks["all"])
|
|||
|
|
{
|
|||
|
|
sb.Append(cssBlocks.Key);
|
|||
|
|
sb.Append(" { ");
|
|||
|
|
foreach (var cssBlock in cssBlocks.Value)
|
|||
|
|
{
|
|||
|
|
foreach (var property in cssBlock.Properties)
|
|||
|
|
{
|
|||
|
|
// TODO:a handle selectors
|
|||
|
|
sb.AppendFormat("{0}: {1};", property.Key, property.Value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
sb.Append(" }");
|
|||
|
|
sb.AppendLine();
|
|||
|
|
}
|
|||
|
|
sb.AppendLine("</style>");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Get the selected word with respect to partial selected words.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="rect">the word to append</param>
|
|||
|
|
/// <param name="selectedText">is to get selected text or all the text in the word</param>
|
|||
|
|
private static string GetSelectedWord(CssRect rect, bool selectedText)
|
|||
|
|
{
|
|||
|
|
if (selectedText && rect.SelectedStartIndex > -1 && rect.SelectedEndIndexOffset > -1)
|
|||
|
|
{
|
|||
|
|
return rect.Text.Substring(rect.SelectedStartIndex, rect.SelectedEndIndexOffset - rect.SelectedStartIndex);
|
|||
|
|
}
|
|||
|
|
else if (selectedText && rect.SelectedStartIndex > -1)
|
|||
|
|
{
|
|||
|
|
return rect.Text.Substring(rect.SelectedStartIndex) + (rect.HasSpaceAfter ? " " : "");
|
|||
|
|
}
|
|||
|
|
else if (selectedText && rect.SelectedEndIndexOffset > -1)
|
|||
|
|
{
|
|||
|
|
return rect.Text.Substring(0, rect.SelectedEndIndexOffset);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
var whitespaceBefore = rect.OwnerBox.Words[0] == rect ? IsBoxHasWhitespace(rect.OwnerBox) : rect.HasSpaceBefore;
|
|||
|
|
return (whitespaceBefore ? " " : "") + rect.Text + (rect.HasSpaceAfter ? " " : "");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Generate textual tree representation of the css boxes tree starting from the given root.<br/>
|
|||
|
|
/// Used for debugging html parsing.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="box">the box to generate for</param>
|
|||
|
|
/// <param name="builder">the string builder to generate to</param>
|
|||
|
|
/// <param name="indent">the current indent level to set indent of generated text</param>
|
|||
|
|
private static void GenerateBoxTree(CssBox box, StringBuilder builder, int indent)
|
|||
|
|
{
|
|||
|
|
builder.AppendFormat("{0}<{1}", new string(' ', 2 * indent), box.Display);
|
|||
|
|
if (box.HtmlTag != null)
|
|||
|
|
builder.AppendFormat(" element=\"{0}\"", box.HtmlTag != null ? box.HtmlTag.Name : string.Empty);
|
|||
|
|
if (box.Words.Count > 0)
|
|||
|
|
builder.AppendFormat(" words=\"{0}\"", box.Words.Count);
|
|||
|
|
builder.AppendFormat("{0}>\r\n", box.Boxes.Count > 0 ? "" : "/");
|
|||
|
|
if (box.Boxes.Count > 0)
|
|||
|
|
{
|
|||
|
|
foreach (var childBox in box.Boxes)
|
|||
|
|
{
|
|||
|
|
GenerateBoxTree(childBox, builder, indent + 1);
|
|||
|
|
}
|
|||
|
|
builder.AppendFormat("{0}</{1}>\r\n", new string(' ', 2 * indent), box.Display);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#endregion
|
|||
|
|
}
|
|||
|
|
}
|