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authorVictoria Plitt <Victoria.Plitt@twine-s.com>2019-04-08 13:49:55 +0300
committerVictoria Plitt <Victoria.Plitt@twine-s.com>2019-04-08 13:49:55 +0300
commitfc8a05358a92cc3c77c5f1e30d536807ef0614fd (patch)
treec65f696ebd60f3790145721307c255e5a339923f /Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/HtmlClipboard.cs
parentb4a71931ea52636c6b36376aa9d71697ccf73524 (diff)
downloadTango-fc8a05358a92cc3c77c5f1e30d536807ef0614fd.tar.gz
Tango-fc8a05358a92cc3c77c5f1e30d536807ef0614fd.zip
were added scripting projects
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+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using System.Windows;
+
+using Tango.Scripting.Editors.Document;
+
+namespace Tango.Scripting.Editors.Highlighting
+{
+ /// <summary>
+ /// Allows copying HTML text to the clipboard.
+ /// </summary>
+ public static class HtmlClipboard
+ {
+ /// <summary>
+ /// Builds a header for the CF_HTML clipboard format.
+ /// </summary>
+ static string BuildHeader(int startHTML, int endHTML, int startFragment, int endFragment)
+ {
+ StringBuilder b = new StringBuilder();
+ b.AppendLine("Version:0.9");
+ b.AppendLine("StartHTML:" + startHTML.ToString("d8", CultureInfo.InvariantCulture));
+ b.AppendLine("EndHTML:" + endHTML.ToString("d8", CultureInfo.InvariantCulture));
+ b.AppendLine("StartFragment:" + startFragment.ToString("d8", CultureInfo.InvariantCulture));
+ b.AppendLine("EndFragment:" + endFragment.ToString("d8", CultureInfo.InvariantCulture));
+ return b.ToString();
+ }
+
+ /// <summary>
+ /// Sets the TextDataFormat.Html on the data object to the specified html fragment.
+ /// This helper methods takes care of creating the necessary CF_HTML header.
+ /// </summary>
+ public static void SetHtml(DataObject dataObject, string htmlFragment)
+ {
+ if (dataObject == null)
+ throw new ArgumentNullException("dataObject");
+ if (htmlFragment == null)
+ throw new ArgumentNullException("htmlFragment");
+
+ string htmlStart = @"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">" + Environment.NewLine
+ + "<HTML>" + Environment.NewLine
+ + "<BODY>" + Environment.NewLine
+ + "<!--StartFragment-->" + Environment.NewLine;
+ string htmlEnd = "<!--EndFragment-->" + Environment.NewLine + "</BODY>" + Environment.NewLine + "</HTML>" + Environment.NewLine;
+ string dummyHeader = BuildHeader(0, 0, 0, 0);
+ // the offsets are stored as UTF-8 bytes (see CF_HTML documentation)
+ int startHTML = dummyHeader.Length;
+ int startFragment = startHTML + htmlStart.Length;
+ int endFragment = startFragment + Encoding.UTF8.GetByteCount(htmlFragment);
+ int endHTML = endFragment + htmlEnd.Length;
+ string cf_html = BuildHeader(startHTML, endHTML, startFragment, endFragment) + htmlStart + htmlFragment + htmlEnd;
+ Debug.WriteLine(cf_html);
+ dataObject.SetText(cf_html, TextDataFormat.Html);
+ }
+
+ /// <summary>
+ /// Creates a HTML fragment from a part of a document.
+ /// </summary>
+ /// <param name="document">The document to create HTML from.</param>
+ /// <param name="highlighter">The highlighter used to highlight the document. <c>null</c> is valid and will create HTML without any highlighting.</param>
+ /// <param name="segment">The part of the document to create HTML for. You can pass <c>null</c> to create HTML for the whole document.</param>
+ /// <param name="options">The options for the HTML creation.</param>
+ /// <returns>HTML code for the document part.</returns>
+ public static string CreateHtmlFragment(TextDocument document, IHighlighter highlighter, ISegment segment, HtmlOptions options)
+ {
+ if (document == null)
+ throw new ArgumentNullException("document");
+ if (options == null)
+ throw new ArgumentNullException("options");
+ if (highlighter != null && highlighter.Document != document)
+ throw new ArgumentException("Highlighter does not belong to the specified document.");
+ if (segment == null)
+ segment = new SimpleSegment(0, document.TextLength);
+
+ StringBuilder html = new StringBuilder();
+ int segmentEndOffset = segment.EndOffset;
+ DocumentLine line = document.GetLineByOffset(segment.Offset);
+ while (line != null && line.Offset < segmentEndOffset) {
+ HighlightedLine highlightedLine;
+ if (highlighter != null)
+ highlightedLine = highlighter.HighlightLine(line.LineNumber);
+ else
+ highlightedLine = new HighlightedLine(document, line);
+ SimpleSegment s = segment.GetOverlap(line);
+ if (html.Length > 0)
+ html.AppendLine("<br>");
+ html.Append(highlightedLine.ToHtml(s.Offset, s.EndOffset, options));
+ line = line.NextLine;
+ }
+ return html.ToString();
+ }
+
+ /// <summary>
+ /// Escapes text and writes the result to the StringBuilder.
+ /// </summary>
+ internal static void EscapeHtml(StringWriter w, string text, HtmlOptions options)
+ {
+ int spaceCount = -1;
+ foreach (char c in text) {
+ if (c == ' ') {
+ if (spaceCount < 0)
+ w.Write("&nbsp;");
+ else
+ spaceCount++;
+ } else if (c == '\t') {
+ if (spaceCount < 0)
+ spaceCount = 0;
+ spaceCount += options.TabSize;
+ } else {
+ if (spaceCount == 1) {
+ w.Write(' ');
+ } else if (spaceCount >= 1) {
+ for (int i = 0; i < spaceCount; i++) {
+ w.Write("&nbsp;");
+ }
+ }
+ spaceCount = 0;
+ switch (c) {
+ case '<':
+ w.Write("&lt;");
+ break;
+ case '>':
+ w.Write("&gt;");
+ break;
+ case '&':
+ w.Write("&amp;");
+ break;
+ case '"':
+ w.Write("&quot;");
+ break;
+ default:
+ w.Write(c);
+ break;
+ }
+ }
+ }
+ for (int i = 0; i < spaceCount; i++) {
+ w.Write("&nbsp;");
+ }
+ }
+ }
+
+ /// <summary>
+ /// Holds options for converting text to HTML.
+ /// </summary>
+ public class HtmlOptions
+ {
+ /// <summary>
+ /// Creates a default HtmlOptions instance.
+ /// </summary>
+ public HtmlOptions()
+ {
+ this.TabSize = 4;
+ }
+
+ /// <summary>
+ /// Creates a new HtmlOptions instance that copies applicable options from the <see cref="TextEditorOptions"/>.
+ /// </summary>
+ public HtmlOptions(TextEditorOptions options)
+ : this()
+ {
+ if (options == null)
+ throw new ArgumentNullException("options");
+ this.TabSize = options.IndentationSize;
+ }
+
+ /// <summary>
+ /// The amount of spaces a tab gets converted to.
+ /// </summary>
+ public int TabSize { get; set; }
+
+ /// <summary>
+ /// Writes the HTML attribute for the style to the text writer.
+ /// </summary>
+ public virtual void WriteStyleAttributeForColor(TextWriter writer, HighlightingColor color)
+ {
+ if (writer == null)
+ throw new ArgumentNullException("writer");
+ if (color == null)
+ throw new ArgumentNullException("color");
+ writer.Write(" style=\"");
+ writer.Write(color.ToCss());
+ writer.Write("\"");
+ }
+
+ /// <summary>
+ /// Gets whether the color needs to be written out to HTML.
+ /// </summary>
+ public virtual bool ColorNeedsSpanForStyling(HighlightingColor color)
+ {
+ if (color == null)
+ throw new ArgumentNullException("color");
+ return !string.IsNullOrEmpty(color.ToCss());
+ }
+ }
+}
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