/// <summary>
/// Test the character name at the memory address specified.
/// Will assert an error if the PUA codepoint name is not correct.
/// </summary>
/// <param name="puaIndex">Unicode codepoint</param>
/// <param name="puaName">Expected correct PUA codepoint name</param>
/// <param name="puaGenCat">The expected PUA General Category</param>
public static void Check_PUA(int puaIndex, string puaName, LgGeneralCharCategory puaGenCat)
{
string name = "";
LgGeneralCharCategory genCategory = LgGeneralCharCategory.kccCn;
//Getting the character name at the memory address specified
ILgCharacterPropertyEngine charPropEngine = LgIcuCharPropEngineClass.Create();
try
{
string icuDataDir = GetIcuDataDir();
Icu.SetDataDirectory(icuDataDir);
Icu.UErrorCode error;
Icu.UCharNameChoice choice = Icu.UCharNameChoice.U_UNICODE_CHAR_NAME;
int len = Icu.u_CharName(puaIndex, choice, out name, out error);
genCategory = charPropEngine.get_GeneralCategory(puaIndex);
}
finally
{
// Must release pointer to free memory-mapping before we try to restore files.
Marshal.ReleaseComObject(charPropEngine);
charPropEngine = null;
Icu.Cleanup(); // clean up the ICU files / data
}
//Check to make sure expected result is the same as actual result, if not, output error
Assert.AreEqual(puaName, name, "PUA Character " +
puaIndex.ToString("x", new System.Globalization.NumberFormatInfo()) +
" is incorrect");
//Check to make sure expected result is the same as actual result, if not, output error
Assert.AreEqual(puaGenCat, genCategory, "PUA Character " +
puaIndex.ToString("x", new System.Globalization.NumberFormatInfo()) +
" has an incorrect digit value");
}
public void CharacterPropertyOverrides()
{
Icu.InitIcuDataDir();
var cpe = LgIcuCharPropEngineClass.Create();
var result = cpe.get_GeneralCategory('\xF171');
Assert.That(result, Is.EqualTo(LgGeneralCharCategory.kccMn));
}
/// <summary>
/// This is called when we have put all we can on the current line. Sometimes we may have put too much!
/// If so, return false, to indicate we can't finalize a line in this state, and trigger backtracking.
/// </summary>
private bool FinalizeLine()
{
Debug.Assert(m_lines.Count > 0);
Debug.Assert(m_lines.Last().Boxes.Count() > 0);
var lastBox = m_lines.Last().Boxes.Last() as StringBox;
if (lastBox == null)
{
return(true); // for now it's always valid to break after a non-string box.
}
var est = m_lineSegTypes.Last();
// If we know that's a bad break, backtrack.
if (est == LgEndSegmentType.kestBadBreak)
{
return(false);
}
if (est != LgEndSegmentType.kestWsBreak)
{
return(true); // all other kinds of break we accept.
}
// For a writing-system break, we must try to figure out whether we can break here.
int ichMin = lastBox.IchMin;
int length = lastBox.Segment.get_Lim(ichMin);
int ichLast = ichMin + length - 1;
// Enhance JohnT: MAYBE we should check for surrogate? But new surrogate pairs we can break after are unlikely.
if (ichLast < 0)
{
return(false); // paranoia
}
string lastChar = Fetch(ichLast, ichLast + 1);
var cpe = LgIcuCharPropEngineClass.Create();
byte lbp;
using (var ptr = new ArrayPtr(1))
{
cpe.GetLineBreakProps(lastChar, 1, ptr);
lbp = Marshal.ReadByte(ptr.IntPtr);
}
lbp &= 0x1f; // strip 'is it a space' high bit
// If it's a space (or other character which provides a break opportunity after),
// go ahead and break. Otherwise treat as bad break.
if (lbp != (byte)LgLBP.klbpSP && lbp != (byte)LgLBP.klbpBA && lbp != (byte)LgLBP.klbpB2)
{
return(false); // can't break here, must backtrack
}
return(true); // stick with the break we have.
}
public void CorrelationFactor()
{
ILgCharacterPropertyEngine engine = LgIcuCharPropEngineClass.Create();
ParagraphCorrelation pc = new ParagraphCorrelation("Hello", "Hello", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello", "Hello ", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation(" Hello", "Hello", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello", "Hello there", engine);
Assert.AreEqual(0.5, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello over there", "Hello over here", engine);
Assert.AreEqual(0.5, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello there", "there Hello", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("I am really excited",
"I am really really really really excited", engine);
Assert.AreEqual(0.8125, pc.CorrelationFactor);
pc = new ParagraphCorrelation(string.Empty, "What will happen here?", engine);
Assert.AreEqual(0.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation(string.Empty, string.Empty, engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation(null, null, engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation(null, "what?", engine);
Assert.AreEqual(0.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("what?", null, engine);
Assert.AreEqual(0.0, pc.CorrelationFactor);
}
public void LongestUsefulSubstring()
{
ILgCharacterPropertyEngine engine = LgIcuCharPropEngineClass.Create();
// two equal strings
ParagraphCorrelation pc = new ParagraphCorrelation("Hello", "Hello", engine);
Assert.AreEqual("Hello", pc.LongestUsefulSubstring);
// LCS at the start
pc = new ParagraphCorrelation("Hello over there", "Hello over here", engine);
Assert.AreEqual("Hello over ", pc.LongestUsefulSubstring);
// LCS in the middle
pc = new ParagraphCorrelation("I want to be over there",
"You want to be over here", engine);
Assert.AreEqual(" want to be over ", pc.LongestUsefulSubstring);
// LCS at the end
pc = new ParagraphCorrelation("Will you come to visit my relatives?",
"Do I ever visit my relatives?", engine);
Assert.AreEqual(" visit my relatives?", pc.LongestUsefulSubstring);
// two common strings, find the longest
pc = new ParagraphCorrelation("This sentence has common words",
"This paragraph has common words", engine);
Assert.AreEqual(" has common words", pc.LongestUsefulSubstring);
// nothing at all in common
pc = new ParagraphCorrelation("We have nothing in common",
"absolutely nill items", engine);
Assert.AreEqual(string.Empty, pc.LongestUsefulSubstring);
// pathological cases
pc = new ParagraphCorrelation(string.Empty, string.Empty, engine);
Assert.AreEqual(string.Empty, pc.LongestUsefulSubstring);
pc = new ParagraphCorrelation(null, string.Empty, engine);
Assert.AreEqual(string.Empty, pc.LongestUsefulSubstring);
pc = new ParagraphCorrelation(string.Empty, "Hello there", engine);
Assert.AreEqual(string.Empty, pc.LongestUsefulSubstring);
}
public void CorrelationFactor_WithDigitsAndPunc()
{
ILgCharacterPropertyEngine engine = LgIcuCharPropEngineClass.Create();
ParagraphCorrelation pc = new ParagraphCorrelation("Hello!", "2Hello.", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello", "Hello, there", engine);
Assert.AreEqual(0.5, pc.CorrelationFactor);
pc = new ParagraphCorrelation("3Hello over there", "Hello over here", engine);
Assert.AreEqual(0.5, pc.CorrelationFactor);
pc = new ParagraphCorrelation("Hello there?", "4there Hello!", engine);
Assert.AreEqual(1.0, pc.CorrelationFactor);
pc = new ParagraphCorrelation("5I am really excited!",
"6I am really really really really excited.", engine);
Assert.AreEqual(0.8125, pc.CorrelationFactor);
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Initializes this object.
/// </summary>
/// <returns>The list of invalid characters encountered.</returns>
/// ------------------------------------------------------------------------------------
private List <string> Init()
{
m_cpe = LgIcuCharPropEngineClass.Create();
Reset();
if (Other != null)
{
Other = Other.Replace(kSpaceReplacment, " ");
}
List <string> invalidChars;
m_WordFormingCharacters = ParseCharString(WordForming, ksDelimiter, m_cpe, out invalidChars);
List <string> invalidCharsTemp;
m_NumericCharacters = ParseCharString(Numeric, ksDelimiter, m_cpe, out invalidCharsTemp, m_WordFormingCharacters);
invalidChars.AddRange(invalidCharsTemp);
m_OtherCharacters = ParseCharString(Other, ksDelimiter, m_cpe, out invalidCharsTemp, m_WordFormingCharacters,
m_NumericCharacters);
invalidChars.AddRange(invalidCharsTemp);
return(invalidChars);
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Initializes this object.
/// </summary>
/// <param name="langDef">The language definition</param>
/// <param name="invalidChars">The list of invalid characters encountered.</param>
/// ------------------------------------------------------------------------------------
private void Init(LanguageDefinition langDef, out List <string> invalidChars)
{
m_cpe = LgIcuCharPropEngineClass.Create();
m_langDef = langDef;
Reset();
if (Other != null)
{
Other = Other.Replace(kSpaceReplacment, " ");
}
m_WordFormingCharacters = ParseCharString(WordForming, ksDelimiter, m_cpe,
langDef, out invalidChars);
List <string> invalidCharsTemp;
m_NumericCharacters = ParseCharString(Numeric, ksDelimiter, m_cpe,
langDef, out invalidCharsTemp, m_WordFormingCharacters);
invalidChars.AddRange(invalidCharsTemp);
m_OtherCharacters = ParseCharString(Other, ksDelimiter, m_cpe, langDef,
out invalidCharsTemp, m_WordFormingCharacters, m_NumericCharacters);
invalidChars.AddRange(invalidCharsTemp);
}
/// <summary>
/// Concatenate the two strings. If there is no white space at the end of the first or the start of the second,
/// and neither is all-white, add some.
/// Enhance JohnT: this cannot consider any special white space characters unique to a particular
/// writing system, and does not allow for the possibility of white space surrogate pairs, since
/// I don't believe there are any in Unicode. Don't use where absolute consistency with a particular
/// writing system is vital.
/// </summary>
public static ITsString ConcatenateWithSpaceIfNeeded(this ITsString first, ITsString second)
{
if (first.Length == 0)
{
return(second);
}
if (second.Length == 0)
{
return(first);
}
var tsb = first.GetBldr();
var cpe = LgIcuCharPropEngineClass.Create();
if (!(IsWhite(cpe, second.Text[0]) || IsWhite(cpe, first.Text.Last())))
{
tsb.Replace(first.Length, first.Length, " ", null);
}
tsb.ReplaceTsString(tsb.Length, tsb.Length, second);
return(tsb.GetString());
}
/// <summary>
/// Checks all the values of a character in the UnicodeData.txt.
/// Checks: fields 1-8,11-14
/// (Skips, 9 and 10, the "Bidi Mirrored" and "Unicode Version 1"
/// </summary>
/// <param name="puaIndex"></param><param name="puaName"></param>
/// <param name="puaGenCat"></param><param name="puaCombiningClass"></param>
/// <param name="puaBidiClass"></param><param name="puaDecomposition"></param>
/// <param name="puaNumeric"></param><param name="puaNumericValue"></param>
/// <param name="puaComment"></param><param name="puaToUpper"></param>
/// <param name="puaToLower"></param><param name="puaToTitle"></param>
public static void Check_PUA(
int puaIndex,
string puaName,
LgGeneralCharCategory puaGenCat,
int puaCombiningClass,
LgBidiCategory puaBidiClass,
string puaDecomposition,
bool puaNumeric,
int puaNumericValue,
string puaComment,
int puaToUpper,
int puaToLower,
int puaToTitle
)
{
string name = "";
LgGeneralCharCategory genCategory = LgGeneralCharCategory.kccCn;
int combiningClass = 0;
string decomposition = "None";
LgBidiCategory bidiCategory = LgBidiCategory.kbicL;
string fullDecomp = "I have no clue";
bool isNumber = false;
int numericValue = -1;
int upper = -1;
int lower = -1;
int title = -1;
string comment = "<none>";
//Getting the character name at the memory address specified
ILgCharacterPropertyEngine charPropEngine = LgIcuCharPropEngineClass.Create();
try
{
string icuDataDir = GetIcuDataDir();
Icu.SetDataDirectory(icuDataDir);
Icu.UErrorCode error;
Icu.UCharNameChoice choice = Icu.UCharNameChoice.U_UNICODE_CHAR_NAME;
int len = Icu.u_CharName(puaIndex, choice, out name, out error);
genCategory = charPropEngine.get_GeneralCategory(puaIndex);
combiningClass = charPropEngine.get_CombiningClass(puaIndex);
bidiCategory = charPropEngine.get_BidiCategory(puaIndex);
decomposition = charPropEngine.get_Decomposition(puaIndex);
fullDecomp = charPropEngine.get_FullDecomp(puaIndex);
// Note: isNumber merely checks the General category, it doesn't check to see if there is a valid numeric value.
isNumber = charPropEngine.get_IsNumber(puaIndex);
if (isNumber)
{
numericValue = charPropEngine.get_NumericValue(puaIndex);
}
comment = charPropEngine.get_Comment(puaIndex);
upper = charPropEngine.get_ToUpperCh(puaIndex);
lower = charPropEngine.get_ToLowerCh(puaIndex);
title = charPropEngine.get_ToTitleCh(puaIndex);
}
finally
{
// Must release pointer to free memory-mapping before we try to restore files.
Marshal.ReleaseComObject(charPropEngine);
charPropEngine = null;
Icu.Cleanup(); // clean up the ICU files / data
}
// StringWriter used to print hexadecimal values in the error messages.
StringWriter stringWriter = new StringWriter(new System.Globalization.NumberFormatInfo());
string errorMessage = "PUA Character " +
puaIndex.ToString("x", new System.Globalization.NumberFormatInfo()) +
" has an incorrect ";
//Check Name [1]
Assert.AreEqual(puaName, name, errorMessage + "name.");
//Check general category [2]
Assert.AreEqual(puaGenCat, genCategory, errorMessage + "general category.");
//Check combining class [3]
Assert.AreEqual(puaCombiningClass, combiningClass, errorMessage + "combining class.");
//Check Bidi class [4]
Assert.AreEqual(puaBidiClass, bidiCategory, errorMessage + "bidi class value.");
//Check Decomposition [5]
stringWriter.WriteLine(errorMessage + "decomposition.");
stringWriter.WriteLine("Decomposition, {0:x}, is incorrect", (int)decomposition[0]);
Assert.AreEqual(puaDecomposition, decomposition, stringWriter.ToString());
//Check Numeric Value [6,7,8]
if (puaNumeric != isNumber)
{
Assert.AreEqual(puaNumeric, isNumber, errorMessage +
"numeric type (i.e. does or doesn't have a numeric value when it should be the other).");
}
if (puaNumeric)
{
Assert.AreEqual(puaNumericValue, numericValue, errorMessage + "numeric value.");
}
//Check ISO Comment [11]
Assert.AreEqual(puaComment, comment, errorMessage + "ISO commment");
//Check uppercase [12]
stringWriter.Flush();
stringWriter.WriteLine(errorMessage + "upper case.");
stringWriter.WriteLine("Found uppercase value: {0:x}", upper);
Assert.AreEqual(puaToUpper, upper, stringWriter.ToString());
//Check lowercase [13]
Assert.AreEqual(puaToLower, lower, errorMessage + "lower case.");
//Check titlecase [14]
Assert.AreEqual(puaToTitle, title, errorMessage + "title case.");
}
public RangeSelection ExpandToWord()
{
var cpe = LgIcuCharPropEngineClass.Create();
RangeSelection rangeSel = new RangeSelection(this, new InsertionPoint(Hookup, StringPosition + 1, AssociatePrevious));
var backwardSel = new InsertionPoint(Hookup, StringPosition, AssociatePrevious);
var forwardSel = new InsertionPoint(Hookup, StringPosition, AssociatePrevious);
while (true)
{
if (backwardSel.StringPosition == 0)
{
break;
}
backwardSel.StringPosition--;
char testChar = backwardSel.ContainingRun.Text[backwardSel.StringPosition];
int testInt = testChar;
if (Surrogates.IsTrailSurrogate(testChar))
{
backwardSel.StringPosition--;
testInt = Surrogates.Int32FromSurrogates(backwardSel.ContainingRun.Text[backwardSel.StringPosition], testChar);
}
else if (Surrogates.IsLeadSurrogate(testChar))
{
testInt = Surrogates.Int32FromSurrogates(testChar, backwardSel.ContainingRun.Text[backwardSel.StringPosition + 1]);
}
if (!cpe.get_IsNumber(testInt) && !cpe.get_IsWordForming(testInt) ||
backwardSel.ContainingRun.WritingSystemAt(backwardSel.StringPosition) != ContainingRun.WritingSystemAt(StringPosition))
{
backwardSel.StringPosition++;
break;
}
rangeSel = new RangeSelection(backwardSel, this);
}
backwardSel = rangeSel.Anchor;
while (true)
{
if (forwardSel.StringPosition == forwardSel.ContainingRun.Length)
{
if (backwardSel.StringPosition == forwardSel.StringPosition)
{
return(null);
}
break;
}
char testChar = forwardSel.ContainingRun.Text[forwardSel.StringPosition];
int testInt = testChar;
if (Surrogates.IsLeadSurrogate(testChar))
{
forwardSel.StringPosition++;
testInt = Surrogates.Int32FromSurrogates(testChar, forwardSel.ContainingRun.Text[forwardSel.StringPosition]);
testChar = (char)testInt;
}
else if (Surrogates.IsTrailSurrogate(testChar))
{
testInt = Surrogates.Int32FromSurrogates(forwardSel.ContainingRun.Text[forwardSel.StringPosition - 1], testChar);
testChar = (char)testInt;
}
if (!cpe.get_IsNumber(testInt) && !cpe.get_IsWordForming(testInt) ||
forwardSel.ContainingRun.WritingSystemAt(forwardSel.StringPosition) != ContainingRun.WritingSystemAt(StringPosition))
{
if (testChar.Equals(" ".ToCharArray()[0]))
{
forwardSel.StringPosition++;
rangeSel = new RangeSelection(backwardSel, forwardSel);
}
break;
}
forwardSel.StringPosition++;
rangeSel = new RangeSelection(backwardSel, forwardSel);
}
return(rangeSel);
}
/// <summary>
/// Redo layout. Should produce the same segments as FullLayout, but assume that segments for text up to
/// details.StartChange may be reused (if not affected by changing line breaks), and segments after
/// details.StartChange+details.DeleteCount may be re-used if a line break works out (and after adjusting
/// their begin offset).
/// </summary>
/// <param name="details"></param>
internal void Relayout(SourceChangeDetails details, LayoutCallbacks lcb)
{
m_reuseableLines = m_para.Lines;
m_lines = new List <ParaLine>();
m_renderRunIndex = 0;
m_ichRendered = 0;
IRenderRun last = m_renderRuns[m_renderRuns.Count - 1];
m_ichLim = last.RenderStart + last.RenderLength;
m_lastRenderRunIndex = m_renderRuns.Count;
Rectangle invalidateRect = m_para.InvalidateRect;
int delta = details.InsertCount - details.DeleteCount;
int oldHeight = m_para.Height;
int oldWidth = m_para.Width;
// Make use of details.StartChange to reuse some lines at start.
if (m_reuseableLines.Count > 0)
{
// As long as we have two complete lines before the change, we can certainly reuse the first of them.
while (m_reuseableLines.Count > 2 && details.StartChange > m_reuseableLines[2].IchMin)
{
m_lines.Add(m_reuseableLines[0]);
m_reuseableLines.RemoveAt(0);
}
// If we still have one complete line before the change, we can reuse it provided there is white
// space after the end of the line and before the change.
if (m_reuseableLines.Count > 1)
{
int startNextLine = m_reuseableLines[1].IchMin;
if (details.StartChange > startNextLine)
{
bool fGotWhite = false;
string line1Text = m_reuseableLines[1].CheckedText;
int lim = details.StartChange - startNextLine;
var cpe = LgIcuCharPropEngineClass.Create();
for (int ich = 0; ich < lim; ich++)
{
// Enhance JohnT: possibly we need to consider surrogates here?
// Worst case is we don't reuse a line we could have, since a surrogate won't
// be considered white.
if (cpe.get_IsSeparator(Convert.ToInt32(line1Text[ich])))
{
fGotWhite = true;
break;
}
}
if (fGotWhite)
{
m_lines.Add(m_reuseableLines[0]);
m_reuseableLines.RemoveAt(0);
}
}
}
m_ichRendered = m_reuseableLines[0].IchMin;
int topOfFirstDiscardedLine = m_reuseableLines[0].Top;
// We don't need to invalidate the lines we're keeping.
invalidateRect = new Rectangle(invalidateRect.Left, invalidateRect.Top + topOfFirstDiscardedLine,
invalidateRect.Width, invalidateRect.Height - topOfFirstDiscardedLine);
}
// Figure out which run we need to continue from, to correspond to the start of the first line
// we need to rebuild.
while (m_renderRunIndex < m_renderRuns.Count && m_renderRuns[m_renderRunIndex].RenderLim <= m_ichRendered)
{
m_renderRunIndex++;
}
while (!Finished)
{
// Todo: I think we need to adjust available width if this is the first line.
BuildALine();
// Drop any initial reusable lines we now determine to be unuseable after all.
// If we've used characters beyond the start of this potentially reusable line, we can't reuse it.
// Also, we don't reuse empty lines. Typically an empty line is left over from a previously empty
// paragraph, and we no longer need the empty segment, even though it doesn't have any of the same
// characters (since it has none) as the segment that has replaced it.
while (m_reuseableLines.Count > 0 && (m_ichRendered > m_reuseableLines[0].IchMin + delta || m_reuseableLines[0].Length == 0))
{
m_reuseableLines.RemoveAt(0);
}
if (m_reuseableLines.Count > 0)
{
// See if we can resync.
var nextLine = m_reuseableLines[0];
if (m_ichRendered == nextLine.IchMin + delta)
{
// reuse it.
int top = m_gapTop;
if (m_lines.Count > 0)
{
ParaLine previous = m_lines.Last();
previous.LastBox.Next = nextLine.FirstBox;
top = TopOfNextLine(previous, nextLine.Ascent);
}
m_lines.AddRange(m_reuseableLines);
if (top != nextLine.Top)
{
ParaLine previous = null;
foreach (var line in m_reuseableLines)
{
if (previous != null) // first time top has already been computed
{
top = TopOfNextLine(previous, line.Ascent);
}
line.Top = top; // BEFORE ArrangeBoxes, since it gets copied to the individual boxes
m_currentLine.ArrangeBoxes(m_para.Style.ParaAlignment, m_gapLeft, m_gapRight, 0, m_layoutInfo.MaxWidth, TopDepth);
previous = line;
}
}
else
{
// reusable lines have not moved, we don't need to invalidate them.
invalidateRect.Height -= (m_reuseableLines.Last().Bottom - top);
}
for (Box box = nextLine.FirstBox; box != null; box = box.Next)
{
if (box is StringBox)
{
(box as StringBox).IchMin += delta;
}
}
break;
}
}
}
SetParaInfo();
// if the paragraph got larger, we need to invalidate the extra area.
// (But, don't reduce it if it got smaller; we want to invalidate all the old stuff as well as all the new.)
if (m_para.Height > oldHeight)
{
invalidateRect.Height += m_para.Height - oldHeight;
}
if (m_para.Width > oldWidth)
{
invalidateRect.Width += m_para.Width - oldWidth;
}
lcb.InvalidateInRoot(invalidateRect);
}
