mirror of https://github.com/OpenTTD/OpenTTD.git
Add: [OSX] Native text caret handling.
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8d7cd6a526
commit
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@ -11,6 +11,7 @@
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#include "../../stdafx.h"
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#include "string_osx.h"
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#include "../../string_func.h"
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#include "macos.h"
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#include <CoreFoundation/CoreFoundation.h>
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@ -56,6 +57,122 @@ int MacOSStringCompare(const char *s1, const char *s2)
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return (int)res + 2;
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}
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/* virtual */ void OSXStringIterator::SetString(const char *s)
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{
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const char *string_base = s;
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this->utf16_to_utf8.clear();
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this->str_info.clear();
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this->cur_pos = 0;
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/* CoreText operates on UTF-16, thus we have to convert the input string.
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* To be able to return proper offsets, we have to create a mapping at the same time. */
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std::vector<UniChar> utf16_str; ///< UTF-16 copy of the string.
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while (*s != '\0') {
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size_t idx = s - string_base;
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WChar c = Utf8Consume(&s);
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if (c < 0x10000) {
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utf16_str.push_back((UniChar)c);
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} else {
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/* Make a surrogate pair. */
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utf16_str.push_back((UniChar)(0xD800 + ((c - 0x10000) >> 10)));
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utf16_str.push_back((UniChar)(0xDC00 + ((c - 0x10000) & 0x3FF)));
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this->utf16_to_utf8.push_back(idx);
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}
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this->utf16_to_utf8.push_back(idx);
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}
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this->utf16_to_utf8.push_back(s - string_base);
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/* Query CoreText for word and cluster break information. */
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this->str_info.resize(utf16_to_utf8.size());
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if (utf16_str.size() > 0) {
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CFStringRef str = CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, &utf16_str[0], utf16_str.size(), kCFAllocatorNull);
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/* Get cluster breaks. */
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for (CFIndex i = 0; i < CFStringGetLength(str); ) {
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CFRange r = CFStringGetRangeOfComposedCharactersAtIndex(str, i);
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this->str_info[r.location].char_stop = true;
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i += r.length;
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}
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/* Get word breaks. */
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CFStringTokenizerRef tokenizer = CFStringTokenizerCreate(kCFAllocatorDefault, str, CFRangeMake(0, CFStringGetLength(str)), kCFStringTokenizerUnitWordBoundary, _osx_locale);
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CFStringTokenizerTokenType tokenType = kCFStringTokenizerTokenNone;
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while ((tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer)) != kCFStringTokenizerTokenNone) {
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/* Skip tokens that are white-space or punctuation tokens. */
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if ((tokenType & kCFStringTokenizerTokenHasNonLettersMask) != kCFStringTokenizerTokenHasNonLettersMask) {
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CFRange r = CFStringTokenizerGetCurrentTokenRange(tokenizer);
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this->str_info[r.location].word_stop = true;
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}
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}
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CFRelease(tokenizer);
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CFRelease(str);
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}
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/* End-of-string is always a valid stopping point. */
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this->str_info.back().char_stop = true;
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this->str_info.back().word_stop = true;
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}
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/* virtual */ size_t OSXStringIterator::SetCurPosition(size_t pos)
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{
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/* Convert incoming position to an UTF-16 string index. */
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size_t utf16_pos = 0;
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for (size_t i = 0; i < this->utf16_to_utf8.size(); i++) {
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if (this->utf16_to_utf8[i] == pos) {
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utf16_pos = i;
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break;
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}
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}
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/* Sanitize in case we get a position inside a grapheme cluster. */
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while (utf16_pos > 0 && !this->str_info[utf16_pos].char_stop) utf16_pos--;
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this->cur_pos = utf16_pos;
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return this->utf16_to_utf8[this->cur_pos];
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}
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/* virtual */ size_t OSXStringIterator::Next(IterType what)
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{
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assert(this->cur_pos <= this->utf16_to_utf8.size());
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assert(what == StringIterator::ITER_CHARACTER || what == StringIterator::ITER_WORD);
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if (this->cur_pos == this->utf16_to_utf8.size()) return END;
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do {
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this->cur_pos++;
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} while (this->cur_pos < this->utf16_to_utf8.size() && (what == ITER_WORD ? !this->str_info[this->cur_pos].word_stop : !this->str_info[this->cur_pos].char_stop));
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return this->cur_pos == this->utf16_to_utf8.size() ? END : this->utf16_to_utf8[this->cur_pos];
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}
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/* virtual */ size_t OSXStringIterator::Prev(IterType what)
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{
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assert(this->cur_pos <= this->utf16_to_utf8.size());
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assert(what == StringIterator::ITER_CHARACTER || what == StringIterator::ITER_WORD);
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if (this->cur_pos == 0) return END;
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do {
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this->cur_pos--;
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} while (this->cur_pos > 0 && (what == ITER_WORD ? !this->str_info[this->cur_pos].word_stop : !this->str_info[this->cur_pos].char_stop));
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return this->utf16_to_utf8[this->cur_pos];
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}
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/* static */ StringIterator *OSXStringIterator::Create()
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{
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if (!MacOSVersionIsAtLeast(10, 5, 0)) return NULL;
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return new OSXStringIterator();
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}
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#else
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void MacOSSetCurrentLocaleName(const char *iso_code) {}
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@ -63,4 +180,9 @@ int MacOSStringCompare(const char *s1, const char *s2)
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{
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return 0;
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}
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/* static */ StringIterator *OSXStringIterator::Create()
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{
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return NULL;
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}
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#endif /* (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) */
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@ -12,6 +12,32 @@
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#ifndef STRING_OSX_H
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#define STRING_OSX_H
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#include "../../gfx_layout.h"
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#include "../../string_base.h"
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#include <vector>
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/** String iterator using CoreText as a backend. */
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class OSXStringIterator : public StringIterator {
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/** Break info for a character. */
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struct CharInfo {
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bool word_stop : 1; ///< Code point is suitable as a word break.
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bool char_stop : 1; ///< Code point is the start of a grapheme cluster, i.e. a "character".
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};
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std::vector<CharInfo> str_info; ///< Break information for each code point.
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std::vector<size_t> utf16_to_utf8; ///< Mapping from UTF-16 code point position to index in the UTF-8 source string.
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size_t cur_pos; ///< Current iteration position.
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public:
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virtual void SetString(const char *s);
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virtual size_t SetCurPosition(size_t pos);
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virtual size_t Next(IterType what);
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virtual size_t Prev(IterType what);
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static StringIterator *Create();
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};
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void MacOSSetCurrentLocaleName(const char *iso_code);
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int MacOSStringCompare(const char *s1, const char *s2);
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@ -874,9 +874,19 @@ public:
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}
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};
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#if defined(WITH_COCOA) && !defined(STRGEN) && !defined(SETTINGSGEN)
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/* static */ StringIterator *StringIterator::Create()
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{
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StringIterator *i = OSXStringIterator::Create();
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if (i != NULL) return i;
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return new DefaultStringIterator();
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}
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#else
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/* static */ StringIterator *StringIterator::Create()
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{
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return new DefaultStringIterator();
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}
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#endif /* defined(WITH_COCOA) && !defined(STRGEN) && !defined(SETTINGSGEN) */
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#endif
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