Browse Source
Copied a load of stuff from Moonlight regarding finding next/prev word that I've put in StringUtils.pull/12/head
Steven Kirk
12 years ago
22 changed files with 549 additions and 73 deletions
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// -----------------------------------------------------------------------
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// <copyright file="StringUtils.cs" company="Steven Kirk">
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// Copyright 2014 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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using System.Globalization; |
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namespace Perspex.Controls.Utils |
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{ |
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internal static class StringUtils |
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{ |
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public static bool IsEol(char c) |
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{ |
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return c == '\r' || c == '\n'; |
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} |
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public static bool IsStartOfWord(string text, int index) |
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{ |
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// A 'word' starts with an AlphaNumeric or some punctuation symbols immediately
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// preceeded by lwsp.
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if (index > 0 && !char.IsWhiteSpace(text[index - 1])) |
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{ |
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return false; |
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} |
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switch (CharUnicodeInfo.GetUnicodeCategory(text[index])) |
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{ |
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case UnicodeCategory.LowercaseLetter: |
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case UnicodeCategory.TitlecaseLetter: |
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case UnicodeCategory.UppercaseLetter: |
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case UnicodeCategory.DecimalDigitNumber: |
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case UnicodeCategory.LetterNumber: |
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case UnicodeCategory.OtherNumber: |
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case UnicodeCategory.DashPunctuation: |
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case UnicodeCategory.InitialQuotePunctuation: |
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case UnicodeCategory.OpenPunctuation: |
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case UnicodeCategory.CurrencySymbol: |
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case UnicodeCategory.MathSymbol: |
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return true; |
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// TODO: How do you do this in .NET?
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//case UnicodeCategory.OtherPunctuation:
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// // words cannot start with '.', but they can start with '&' or '*' (for example)
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// return g_unichar_break_type(buffer->text[index]) == G_UNICODE_BREAK_ALPHABETIC;
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default: |
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return false; |
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} |
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} |
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public static int PreviousWord(string text, int cursor, bool gtkMode) |
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{ |
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int begin; |
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int i; |
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int cr; |
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int lf; |
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lf = LineBegin(text, cursor) - 1; |
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if (lf > 0 && text[lf] == '\n' && text[lf - 1] == '\r') |
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{ |
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cr = lf - 1; |
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} |
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else |
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{ |
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cr = lf; |
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} |
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// if the cursor is at the beginning of the line, return the end of the prev line
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if (cursor - 1 == lf) |
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{ |
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return (cr > 0) ? cr : 0; |
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} |
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if (gtkMode) |
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{ |
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CharClass cc = GetCharClass(text[cursor - 1]); |
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begin = lf + 1; |
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i = cursor; |
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// skip over the word, punctuation, or run of whitespace
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while (i > begin && GetCharClass(text[i - 1]) == cc) |
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{ |
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i--; |
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} |
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// if the cursor was at whitespace, skip back a word too
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if (cc == CharClass.CharClassWhitespace && i > begin) |
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{ |
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cc = GetCharClass(text[i - 1]); |
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while (i > begin && GetCharClass(text[i - 1]) == cc) |
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{ |
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i--; |
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} |
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} |
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} |
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else |
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{ |
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begin = lf + 1; |
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i = cursor; |
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if (cursor < text.Length) |
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{ |
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// skip to the beginning of this word
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while (i > begin && !char.IsWhiteSpace(text[i - 1])) |
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{ |
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i--; |
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} |
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if (i < cursor && IsStartOfWord(text, i)) |
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{ |
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return i; |
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} |
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} |
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// skip to the start of the lwsp
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while (i > begin && char.IsWhiteSpace(text[i - 1])) |
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{ |
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i--; |
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} |
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if (i > begin) |
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{ |
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i--; |
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} |
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// skip to the beginning of the word
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while (i > begin && !IsStartOfWord(text, i)) |
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{ |
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i--; |
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} |
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} |
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return i; |
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} |
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public static int NextWord(string text, int cursor, bool gtkMode) |
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{ |
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int i, lf, cr; |
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cr = LineEnd(text, cursor); |
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if (cr < text.Length && text[cr] == '\r' && text[cr + 1] == '\n') |
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{ |
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lf = cr + 1; |
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} |
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else |
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{ |
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lf = cr; |
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} |
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// if the cursor is at the end of the line, return the starting offset of the next line
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if (cursor == cr || cursor == lf) |
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{ |
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if (lf < text.Length) |
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{ |
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return lf + 1; |
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} |
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return cursor; |
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} |
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if (gtkMode) |
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{ |
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CharClass cc = GetCharClass(text[cursor]); |
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i = cursor; |
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// skip over the word, punctuation, or run of whitespace
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while (i < cr && GetCharClass(text[i]) == cc) |
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{ |
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i++; |
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} |
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// skip any whitespace after the word/punct
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while (i < cr && char.IsWhiteSpace(text[i])) |
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{ |
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i++; |
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} |
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} |
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else |
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{ |
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i = cursor; |
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// skip to the end of the current word
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while (i < cr && !char.IsWhiteSpace(text[i])) |
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{ |
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i++; |
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} |
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// skip any whitespace after the word
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while (i < cr && char.IsWhiteSpace(text[i])) |
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{ |
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i++; |
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} |
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// find the start of the next word
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while (i < cr && !IsStartOfWord(text, i)) |
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{ |
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i++; |
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} |
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} |
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return i; |
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} |
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private static CharClass GetCharClass(char c) |
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{ |
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if (char.IsWhiteSpace(c)) |
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{ |
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return CharClass.CharClassWhitespace; |
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} |
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else if (char.IsLetterOrDigit(c)) |
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{ |
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return CharClass.CharClassAlphaNumeric; |
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} |
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else |
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{ |
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return CharClass.CharClassUnknown; |
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} |
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} |
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private static int LineBegin(string text, int pos) |
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{ |
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while (pos > 0 && !IsEol(text[pos - 1])) |
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{ |
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pos--; |
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} |
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return pos; |
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} |
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private static int LineEnd(string text, int cursor, bool include = false) |
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{ |
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while (cursor < text.Length && !IsEol(text[cursor])) |
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{ |
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cursor++; |
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} |
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if (include && cursor < text.Length) |
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{ |
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if (text[cursor] == '\r' && text[cursor + 1] == '\n') |
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{ |
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cursor += 2; |
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} |
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else |
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{ |
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cursor++; |
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} |
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} |
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return cursor; |
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} |
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private enum CharClass |
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{ |
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CharClassUnknown, |
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CharClassWhitespace, |
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CharClassAlphaNumeric, |
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} |
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} |
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} |
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@ -0,0 +1,17 @@ |
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// -----------------------------------------------------------------------
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// <copyright file="IPlatformSettings.cs" company="Steven Kirk">
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// Copyright 2013 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace Perspex.Platform |
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{ |
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using System; |
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public interface IPlatformSettings |
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{ |
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Size DoubleClickSize { get; } |
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TimeSpan DoubleClickTime { get; } |
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} |
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} |
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@ -0,0 +1,13 @@ |
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// -----------------------------------------------------------------------
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// <copyright file="PointerEventArgs.cs" company="Steven Kirk">
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// Copyright 2013 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace Perspex.Input |
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{ |
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public class PointerPressEventArgs : PointerEventArgs |
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{ |
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public int ClickCount { get; set; } |
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} |
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} |
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