private static void GetCompositionUnderlines(IntPtr hIMC, int targetStart, int targetEnd, List <CompositionUnderline> underlines) { var clauseSize = ImeNative.ImmGetCompositionString(hIMC, ImeNative.GCS_COMPCLAUSE, null, 0); if (clauseSize <= 0) { return; } int clauseLength = (int)clauseSize / sizeof(Int32); // buffer contains 32 bytes (4 bytes) array var clauseData = new byte[(int)clauseSize]; ImeNative.ImmGetCompositionString(hIMC, ImeNative.GCS_COMPCLAUSE, clauseData, clauseSize); var clauseLength_1 = clauseLength - 1; for (int i = 0; i < clauseLength_1; i++) { int from = BitConverter.ToInt32(clauseData, i * sizeof(Int32)); int to = BitConverter.ToInt32(clauseData, (i + 1) * sizeof(Int32)); var range = new Range(from, to); bool thick = (range.From >= targetStart && range.To <= targetEnd); underlines.Add(new CompositionUnderline(range, ColorUNDERLINE, ColorBKCOLOR, thick)); } }
private static bool GetString(IntPtr hIMC, uint lParam, uint type, out string text) { text = string.Empty; if (!IsParam(lParam, type)) { return(false); } var strLen = ImeNative.ImmGetCompositionString(hIMC, type, null, 0); if (strLen <= 0) { return(false); } // buffer contains char (2 bytes) byte[] buffer = new byte[strLen]; ImeNative.ImmGetCompositionString(hIMC, type, buffer, strLen); text = Encoding.Unicode.GetString(buffer); return(true); }
private static void GetCompositionSelectionRange(IntPtr hIMC, ref int targetStart, ref int targetEnd) { var attributeSize = ImeNative.ImmGetCompositionString(hIMC, ImeNative.GCS_COMPATTR, null, 0); if (attributeSize <= 0) { return; } int start = 0; int end = 0; // Buffer contains 8bit array var attributeData = new byte[attributeSize]; ImeNative.ImmGetCompositionString(hIMC, ImeNative.GCS_COMPATTR, attributeData, attributeSize); for (start = 0; start < attributeSize; ++start) { if (IsSelectionAttribute(attributeData[start])) { break; } } for (end = start; end < attributeSize; ++end) { if (!IsSelectionAttribute(attributeData[end])) { break; } } targetStart = start; targetEnd = end; }
private static void GetCompositionInfo(IntPtr hwnd, uint lParam, string text, List <CompositionUnderline> underlines, ref int compositionStart) { var hIMC = ImeNative.ImmGetContext(hwnd); underlines.Clear(); int targetStart = text.Length; int targetEnd = text.Length; if (IsParam(lParam, ImeNative.GCS_COMPATTR)) { GetCompositionSelectionRange(hIMC, ref targetStart, ref targetEnd); } // Retrieve the selection range information. If CS_NOMOVECARET is specified // it means the cursor should not be moved and we therefore place the caret at // the beginning of the composition string. Otherwise we should honour the // GCS_CURSORPOS value if it's available. if (!IsParam(lParam, ImeNative.CS_NOMOVECARET) && IsParam(lParam, ImeNative.GCS_CURSORPOS)) { // IMM32 does not support non-zero-width selection in a composition. So // always use the caret position as selection range. int cursor = (int)ImeNative.ImmGetCompositionString(hIMC, ImeNative.GCS_CURSORPOS, null, 0); compositionStart = cursor; } else { compositionStart = 0; } if (IsParam(lParam, ImeNative.GCS_COMPCLAUSE)) { GetCompositionUnderlines(hIMC, targetStart, targetEnd, underlines); } if (underlines.Count == 0) { var range = new Range(); bool thick = false; if (targetStart > 0) { range = new Range(0, targetStart); } if (targetEnd > targetStart) { range = new Range(targetStart, targetEnd); thick = true; } if (targetEnd < text.Length) { range = new Range(targetEnd, text.Length); } underlines.Add(new CompositionUnderline(range, ColorUNDERLINE, ColorBKCOLOR, thick)); } ImeNative.ImmReleaseContext(hwnd, hIMC); }