private static bool GetLine(Paragraph paragraph, TextLine line, Win32DCSafeHandle hdc, FontCache fontCache, FlowContext flowContext, float left, float right, float height, Stack <int> lineRunsIndex, Stack <int> lineRunsCharIndex, int lineIndents) { float num = right - left; float num2 = left; bool newLine = false; int num3 = 0; do { lineRunsIndex.Push(flowContext.Context.TextRunIndex); lineRunsCharIndex.Push(flowContext.Context.TextRunCharacterIndex); TextRun subRunForLine = paragraph.GetSubRunForLine(flowContext.Context, ref newLine); if (subRunForLine == null) { break; } line.LogicalRuns.Add(subRunForLine); int width = subRunForLine.GetWidth(hdc, fontCache); num3 = Math.Max(subRunForLine.GetWidth(hdc, fontCache, isAtLineEnd: true) - width, num3); num2 += (float)width; if (!(num2 + (float)num3 > right)) { continue; } bool flag = flowContext.WordTrim; if (!flowContext.LineLimit && flag) { if ((float)line.GetHeight(hdc, fontCache) >= height) { flag = false; } line.ResetHeight(); } if (!subRunForLine.IsPlaceholderTextRun) { FoldLine(paragraph, line, hdc, fontCache, flowContext, flag, lineRunsIndex, lineRunsCharIndex, num - (float)num3, lineIndents); break; } lineRunsIndex.Push(flowContext.Context.TextRunIndex); lineRunsCharIndex.Push(flowContext.Context.TextRunCharacterIndex); bool flag2 = true; TextRun subRunForLine2 = paragraph.GetSubRunForLine(flowContext.Context, ref newLine); if (subRunForLine2 != null) { flag2 = (subRunForLine.TextRunProperties.IndexInParagraph < subRunForLine2.TextRunProperties.IndexInParagraph); } flowContext.Context.TextRunIndex = lineRunsIndex.Pop(); flowContext.Context.TextRunCharacterIndex = lineRunsCharIndex.Pop(); if (flag2) { FoldLine(paragraph, line, hdc, fontCache, flowContext, flag, lineRunsIndex, lineRunsCharIndex, num - (float)num3, lineIndents); break; } }while (!newLine); if (line.LogicalRuns.Count == 0) { return(false); } return(true); }
private static void RenderParagraph(TextBox textBox, Paragraph paragraph, Win32DCSafeHandle hdc, FontCache fontCache, int offsetX, ref int offsetY, Rectangle layoutRectangle, float dpiX) { List <TextLine> textLines = paragraph.TextLines; IParagraphProps paragraphProps = paragraph.ParagraphProps; bool flag = textBox.TextBoxProps.Direction == RPLFormat.Directions.LTR; RPLFormat.TextAlignments textAlignments = paragraphProps.Alignment; if (textAlignments == RPLFormat.TextAlignments.General) { textAlignments = textBox.TextBoxProps.DefaultAlignment; if (!flag) { switch (textAlignments) { case RPLFormat.TextAlignments.Right: textAlignments = RPLFormat.TextAlignments.Left; break; case RPLFormat.TextAlignments.Left: textAlignments = RPLFormat.TextAlignments.Right; break; } } } int num = ConvertToPixels(paragraphProps.LeftIndent, dpiX); int num2 = ConvertToPixels(paragraphProps.RightIndent, dpiX); int num3 = ConvertToPixels(paragraphProps.HangingIndent, dpiX); if (num3 < 0) { if (flag) { num -= num3; } else { num2 -= num3; } } if (paragraphProps.ListLevel > 0) { int num4 = paragraphProps.ListLevel * ConvertToPixels(10.583333f, dpiX); if (flag) { num += num4; } else { num2 += num4; } } if (textLines == null || textLines.Count == 0) { offsetY += ConvertToPixels(paragraphProps.SpaceBefore, dpiX); offsetY += ConvertToPixels(paragraphProps.SpaceAfter, dpiX); return; } Graphics graphics = null; try { for (int i = 0; i < textLines.Count; i++) { TextLine textLine = textLines[i]; int ascent = textLine.GetAscent(hdc, fontCache); textLine.GetDescent(hdc, fontCache); int height = textLine.GetHeight(hdc, fontCache); if (textLine.FirstLine) { offsetY += ConvertToPixels(paragraphProps.SpaceBefore, dpiX); } int baselineY = offsetY + ascent; offsetY += height; int num5 = offsetX; switch (textAlignments) { case RPLFormat.TextAlignments.Left: num5 = num; break; case RPLFormat.TextAlignments.Center: { int num6 = 0; num6 = ((!textBox.HorizontalText) ? layoutRectangle.Height : layoutRectangle.Width); num5 = num + (num6 - num - num2) / 2 - textLine.GetWidth(hdc, fontCache) / 2; break; } default: num5 = ((!textBox.HorizontalText) ? (layoutRectangle.Height - num2 - textLine.GetWidth(hdc, fontCache)) : (layoutRectangle.Width - num2 - textLine.GetWidth(hdc, fontCache))); break; } if (textLine.Prefix != null && textLine.Prefix.Count > 0) { int num7 = (!flag) ? (num5 + textLine.GetWidth(hdc, fontCache) + ConvertToPixels(4.233333f, dpiX)) : (num5 - ConvertToPixels(4.233333f, dpiX) - textLine.GetPrefixWidth(hdc, fontCache)); if (num3 < 0) { if (flag && textAlignments == RPLFormat.TextAlignments.Left) { num7 += num3; } else if (!flag && textAlignments == RPLFormat.TextAlignments.Right) { num7 -= num3; } } for (int j = 0; j < textLine.Prefix.Count; j++) { TextRun textRun = textLine.Prefix[j]; textBox.TextBoxProps.DrawTextRun(textRun, paragraph, hdc, dpiX, fontCache, num7, offsetY, baselineY, height, layoutRectangle); num7 += textRun.GetWidth(hdc, fontCache); } } if (textLine.FirstLine && num3 != 0) { if (flag) { switch (textAlignments) { case RPLFormat.TextAlignments.Left: num5 += num3; break; case RPLFormat.TextAlignments.Center: num5 += num3 / 2; break; } } else { switch (textAlignments) { case RPLFormat.TextAlignments.Right: num5 -= num3; break; case RPLFormat.TextAlignments.Center: num5 -= num3 / 2; break; } } } int prevRunWidth = 0; int prevRunX = 0; TextRun prevRun = null; int count = textLine.VisualRuns.Count; for (int k = 0; k < count; k++) { TextRun textRun2 = textLine.VisualRuns[k]; int width = textRun2.GetWidth(hdc, fontCache, k == count - 1); if (!textRun2.IsHighlightTextRun) { if (width > 0) { textBox.TextBoxProps.DrawTextRun(textRun2, paragraph, hdc, dpiX, fontCache, num5, offsetY, baselineY, height, layoutRectangle); } } else { bool flag2 = (flag && k + 1 == count) || (!flag && k == 0); if (width > 0 || flag2) { if (graphics == null) { graphics = Graphics.FromHdc(hdc.Handle); } RenderHighlightedTextRun(textBox, paragraph, textRun2, prevRun, hdc, graphics, fontCache, dpiX, num5, offsetY, baselineY, height, layoutRectangle, width, prevRunWidth, prevRunX, flag2, textLine.LastLine); } } prevRunX = num5; prevRunWidth = width; num5 += width; prevRun = textRun2; } if (textLine.LastLine) { offsetY += ConvertToPixels(paragraphProps.SpaceAfter, dpiX); } } } finally { if (graphics != null) { graphics.Dispose(); graphics = null; } } }
private Point GetParagraphAndRunCoordinates(Win32DCSafeHandle hdc, TextBoxContext location, bool moveCaretToNextLine, out int lineYOffset, out int lineHeight, out TextRun textRun, out int textRunCharacterIndex, out bool isFirstLine, out bool isLastLine) { int num = 0; int textRunIndex = location.TextRunIndex; textRunCharacterIndex = location.TextRunCharacterIndex; lineYOffset = 0; lineHeight = 0; textRun = null; isFirstLine = true; isLastLine = true; List <Paragraph> rTParagraphs = RTParagraphs; if (rTParagraphs == null || location.ParagraphIndex >= rTParagraphs.Count) { return(Point.Empty); } Paragraph paragraph = rTParagraphs[location.ParagraphIndex]; int num2 = paragraph.OffsetY + TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceBefore, Dpi); int num3 = TextBox.ConvertToPixels(paragraph.ParagraphProps.LeftIndent, Dpi); int num4 = TextBox.ConvertToPixels(paragraph.ParagraphProps.RightIndent, Dpi); int num5 = TextBox.ConvertToPixels(paragraph.ParagraphProps.HangingIndent, Dpi); bool flag = m_rttextbox.TextBoxProps.Direction == RPLFormat.Directions.LTR; if (num5 < 0) { if (flag) { num3 -= num5; } else { num4 -= num5; } } int listLevel = paragraph.ParagraphProps.ListLevel; if (listLevel > 0) { int num6 = listLevel * TextBox.ConvertToPixels(10.583333f, Dpi); if (flag) { num3 += num6; } else { num4 += num6; } } for (int i = 0; i < paragraph.TextLines.Count; i++) { TextLine textLine = paragraph.TextLines[i]; int descent = textLine.GetDescent(hdc, FontCache); lineHeight = textLine.GetHeight(hdc, FontCache); lineYOffset = num2; num2 += lineHeight; RPLFormat.TextAlignments textAlignments = paragraph.ParagraphProps.Alignment; if (textAlignments == RPLFormat.TextAlignments.General) { textAlignments = m_rttextbox.TextBoxProps.DefaultAlignment; if (!flag) { switch (textAlignments) { case RPLFormat.TextAlignments.Left: textAlignments = RPLFormat.TextAlignments.Right; break; case RPLFormat.TextAlignments.Right: textAlignments = RPLFormat.TextAlignments.Left; break; } } } switch (textAlignments) { case RPLFormat.TextAlignments.Center: num = num3 + (WidthInPX - num3 - num4) / 2 - textLine.GetWidth(hdc, FontCache) / 2; break; case RPLFormat.TextAlignments.Right: num = WidthInPX - textLine.GetWidth(hdc, FontCache) - num4; break; default: num = num3; break; } if (textLine.FirstLine && num5 != 0) { if (flag) { switch (textAlignments) { case RPLFormat.TextAlignments.Left: num += num5; break; case RPLFormat.TextAlignments.Center: num += num5 / 2; break; } } else { switch (textAlignments) { case RPLFormat.TextAlignments.Right: num -= num5; break; case RPLFormat.TextAlignments.Center: num -= num5 / 2; break; } } } int count = textLine.VisualRuns.Count; for (int j = 0; j < count; j++) { textRun = textLine.VisualRuns[j]; if (textRun.TextRunProperties.IndexInParagraph == textRunIndex && textRunCharacterIndex >= textRun.CharacterIndexInOriginal) { bool flag2 = (moveCaretToNextLine || textRun.CharacterCount <= 0 || textRun.Text[textRun.CharacterCount - 1] != '\n') ? (textRunCharacterIndex <= textRun.CharacterIndexInOriginal + textRun.CharacterCount) : (textRunCharacterIndex < textRun.CharacterIndexInOriginal + textRun.CharacterCount); if (flag2 || (i + 1 == paragraph.TextLines.Count && j + 1 == count)) { if (moveCaretToNextLine && textRunCharacterIndex == textRun.CharacterIndexInOriginal + textRun.CharacterCount && j + 1 == count && i + 1 < paragraph.TextLines.Count) { location = location.Clone(); if (paragraph.TextLines[i + 1].VisualRuns[0].TextRunProperties.IndexInParagraph != textRunIndex) { location.TextRunIndex++; location.TextRunCharacterIndex = 0; } Point paragraphAndRunCoordinates = GetParagraphAndRunCoordinates(hdc, location, moveCaretToNextLine: false, out lineYOffset, out lineHeight, out textRun, out textRunCharacterIndex, out isFirstLine, out isLastLine); textRunCharacterIndex = Math.Max(textRunCharacterIndex - 1, 0); return(paragraphAndRunCoordinates); } textRunCharacterIndex -= textRun.CharacterIndexInOriginal; isFirstLine = textLine.FirstLine; isLastLine = textLine.LastLine; return(new Point(num, num2 - descent)); } } num += textRun.GetWidth(hdc, FontCache); } } textRun = null; return(Point.Empty); }
private TextBoxContext GetParagraphAndRunIndex(Graphics g, Paragraph paragraph, int leftIndent, int rightIndent, int hangingIndent, int x, int y, bool isLTR, bool lastParagraph, out TextRun run, out int runX, out bool atEndOfLine) { Win32DCSafeHandle win32DCSafeHandle = null; bool flag = false; try { if (g == null) { flag = true; g = Graphics.FromHwnd(IntPtr.Zero); } win32DCSafeHandle = new Win32DCSafeHandle(g.GetHdc(), ownsHandle: false); runX = x; run = null; atEndOfLine = false; for (int i = 0; i < paragraph.TextLines.Count; i++) { TextLine textLine = paragraph.TextLines[i]; y -= textLine.GetHeight(win32DCSafeHandle, FontCache); if (textLine.FirstLine) { y -= TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceBefore, Dpi); } else if (textLine.LastLine) { y -= TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceAfter, Dpi); } if (y >= 0 && i + 1 != paragraph.TextLines.Count) { continue; } int width = textLine.GetWidth(win32DCSafeHandle, FontCache); if (x > WidthInPX) { atEndOfLine = (width > 0); run = GetLastNonLineBreakRun(textLine.LogicalRuns, out int charIndex, out bool hasNonCRLFChars); TextBoxContext textBoxContext = new TextBoxContext(); textBoxContext.TextRunIndex = run.TextRunProperties.IndexInParagraph; if (hasNonCRLFChars && run.CharacterCount > 0) { textBoxContext.TextRunCharacterIndex = run.CharacterIndexInOriginal + charIndex + 1; } else { textBoxContext.TextRunCharacterIndex = run.CharacterIndexInOriginal; } run = null; return(textBoxContext); } if (x < 0) { atEndOfLine = false; run = GetFirstNonLineBreakRun(textLine.LogicalRuns, out int charIndex2); TextBoxContext result = new TextBoxContext { TextRunIndex = run.TextRunProperties.IndexInParagraph, TextRunCharacterIndex = run.CharacterIndexInOriginal + charIndex2 }; run = null; return(result); } RPLFormat.TextAlignments textAlignments = paragraph.ParagraphProps.Alignment; if (textAlignments == RPLFormat.TextAlignments.General) { textAlignments = m_rttextbox.TextBoxProps.DefaultAlignment; if (!isLTR) { switch (textAlignments) { case RPLFormat.TextAlignments.Left: textAlignments = RPLFormat.TextAlignments.Right; break; case RPLFormat.TextAlignments.Right: textAlignments = RPLFormat.TextAlignments.Left; break; } } } switch (textAlignments) { case RPLFormat.TextAlignments.Center: runX = x - (leftIndent + (WidthInPX - leftIndent - rightIndent) / 2 - width / 2); break; case RPLFormat.TextAlignments.Right: runX = x - (WidthInPX - width - rightIndent); break; default: runX = x - leftIndent; break; } if (textLine.FirstLine && hangingIndent != 0) { if (isLTR) { switch (textAlignments) { case RPLFormat.TextAlignments.Left: runX -= hangingIndent; break; case RPLFormat.TextAlignments.Center: runX -= hangingIndent / 2; break; } } else { switch (textAlignments) { case RPLFormat.TextAlignments.Right: runX += hangingIndent; break; case RPLFormat.TextAlignments.Center: runX += hangingIndent / 2; break; } } } runX = Math.Max(0, runX); return(GetParagraphAndRunIndex(win32DCSafeHandle, paragraph, textLine, x, width, lastParagraph, out run, ref runX, out atEndOfLine)); } return(null); } finally { if (!win32DCSafeHandle.IsInvalid) { g.ReleaseHdc(); } if (flag) { g.Dispose(); g = null; } } }
private static bool FlowParagraph(Paragraph paragraph, RPLFormat.Directions direction, Win32DCSafeHandle hdc, float dpiX, FontCache fontCache, FlowContext flowContext, bool keepLines, SizeF flowContextSize, ref int contentOffset) { List <TextLine> list = new List <TextLine>(); TextBoxContext context = flowContext.Context; int num = paragraph.OffsetY; paragraph.ProcessedEmptyParagraph = false; bool flag = false; IParagraphProps paragraphProps = paragraph.ParagraphProps; if (!flowContext.Updatable || !paragraph.Updated) { flag = (context.TextRunIndex == 0 && context.TextRunCharacterIndex == 0); } if (flag) { num += TextBox.ConvertToPixels(paragraphProps.SpaceBefore, dpiX); if ((float)num >= flowContextSize.Height) { paragraph.Height = num - paragraph.OffsetY; return(false); } } int num2 = contentOffset; float leftIndent = 0f; float rightIndent = 0f; float hangingIndent = 0f; paragraph.GetParagraphIndents(direction, dpiX, out leftIndent, out rightIndent, out hangingIndent); Stack <int> stack = null; Stack <int> stack2 = null; TextLine textLine = null; while (true) { float num3 = leftIndent; float num4 = rightIndent; if (flag) { if (direction == RPLFormat.Directions.LTR) { num3 += hangingIndent; } else { num4 += hangingIndent; } } stack = new Stack <int>(); stack2 = new Stack <int>(); textLine = new TextLine(); if (flag) { textLine.Prefix = CreateLinePrefix(paragraph, direction); textLine.FirstLine = true; } if (!GetLine(paragraph, textLine, hdc, fontCache, flowContext, num3, flowContextSize.Width - num4, flowContextSize.Height - (float)num, stack, stack2, (int)(num3 + num4))) { if (list.Count > 0) { list[list.Count - 1].LastLine = true; } num += TextBox.ConvertToPixels(paragraphProps.SpaceAfter, dpiX); break; } if (keepLines) { textLine.ScriptLayout(hdc, fontCache); } num += textLine.GetHeight(hdc, fontCache); list.Add(textLine); num2 = num; if ((float)num >= flowContextSize.Height) { break; } flag = false; } paragraph.Height = num - paragraph.OffsetY; if ((float)num > flowContextSize.Height) { if (list.Count > 0 && (float)num2 > flowContextSize.Height) { TextLine textLine2 = list[list.Count - 1]; int textRunIndex = 0; int textRunCharacterIndex = 0; while (stack.Count > 0) { textRunIndex = stack.Pop(); } while (stack2.Count > 0) { textRunCharacterIndex = stack2.Pop(); } if (flowContext.LineLimit) { context.TextRunIndex = textRunIndex; context.TextRunCharacterIndex = textRunCharacterIndex; list.RemoveAt(list.Count - 1); flowContext.OmittedLineHeight = TextBox.ConvertToMillimeters(textLine2.GetHeight(hdc, fontCache), dpiX); if (textLine2.FirstLine) { num2 -= TextBox.ConvertToPixels(paragraphProps.SpaceBefore, dpiX); } } else { TextBoxContext textBoxContext = context.Clone(); textBoxContext.TextRunIndex = textRunIndex; textBoxContext.TextRunCharacterIndex = textRunCharacterIndex; flowContext.ClipContext = textBoxContext; } num2 -= textLine2.GetHeight(hdc, fontCache); } paragraph.AdvanceToNextRun(context, skipEmptyRuns: false); paragraph.AdvanceToNextRun(flowContext.ClipContext, skipEmptyRuns: false); if (list.Count > 0) { if (flowContext.ClipContext == null && paragraph.AtEndOfParagraph(context)) { contentOffset = num; } else { contentOffset = num2; } paragraph.TextLines = list; return(true); } paragraph.TextLines = null; if (paragraph.AtEndOfParagraph(context)) { contentOffset = num; } return(false); } paragraph.AdvanceToNextRun(context); paragraph.TextLines = list; contentOffset = num; return(true); }