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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file string_osx.cpp Functions related to localized text support on OSX. */
#include "../../stdafx.h"
#include "string_osx.h"
#include "../../string_func.h"
#include "../../strings_func.h"
#include "../../table/control_codes.h"
#include "../../fontcache.h"
#include "macos.h"
#include <CoreFoundation/CoreFoundation.h>
#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
/** Cached current locale. */
static CFAutoRelease<CFLocaleRef> _osx_locale;
/** CoreText cache for font information, cleared when OTTD changes fonts. */
static CFAutoRelease<CTFontRef> _font_cache[FS_END];
/**
* Wrapper for doing layouts with CoreText.
*/
class CoreTextParagraphLayout : public ParagraphLayouter {
private:
const CoreTextParagraphLayoutFactory::CharType *text_buffer;
ptrdiff_t length;
const FontMap& font_map;
CFAutoRelease<CTTypesetterRef> typesetter;
CFIndex cur_offset = 0; ///< Offset from the start of the current run from where to output.
public:
/** Visual run contains data about the bit of text with the same font. */
class CoreTextVisualRun : public ParagraphLayouter::VisualRun {
private:
std::vector<GlyphID> glyphs;
std::vector<float> positions;
std::vector<int> glyph_to_char;
int total_advance = 0;
Font *font;
public:
CoreTextVisualRun(CTRunRef run, Font *font, const CoreTextParagraphLayoutFactory::CharType *buff);
CoreTextVisualRun(CoreTextVisualRun &&other) = default;
const GlyphID *GetGlyphs() const override { return &this->glyphs[0]; }
const float *GetPositions() const override { return &this->positions[0]; }
const int *GetGlyphToCharMap() const override { return &this->glyph_to_char[0]; }
const Font *GetFont() const override { return this->font; }
int GetLeading() const override { return this->font->fc->GetHeight(); }
int GetGlyphCount() const override { return (int)this->glyphs.size(); }
int GetAdvance() const { return this->total_advance; }
};
/** A single line worth of VisualRuns. */
class CoreTextLine : public std::vector<CoreTextVisualRun>, public ParagraphLayouter::Line {
public:
CoreTextLine(CFAutoRelease<CTLineRef> line, const FontMap &fontMapping, const CoreTextParagraphLayoutFactory::CharType *buff)
{
CFArrayRef runs = CTLineGetGlyphRuns(line.get());
for (CFIndex i = 0; i < CFArrayGetCount(runs); i++) {
CTRunRef run = (CTRunRef)CFArrayGetValueAtIndex(runs, i);
/* Extract font information for this run. */
CFRange chars = CTRunGetStringRange(run);
auto map = fontMapping.begin();
while (map < fontMapping.end() - 1 && map->first <= chars.location) map++;
this->emplace_back(run, map->second, buff);
}
}
int GetLeading() const override;
int GetWidth() const override;
int CountRuns() const override { return this->size(); }
const VisualRun &GetVisualRun(int run) const override { return this->at(run); }
int GetInternalCharLength(WChar c) const override
{
/* CoreText uses UTF-16 internally which means we need to account for surrogate pairs. */
return c >= 0x010000U ? 2 : 1;
}
};
CoreTextParagraphLayout(CFAutoRelease<CTTypesetterRef> typesetter, const CoreTextParagraphLayoutFactory::CharType *buffer, ptrdiff_t len, const FontMap &fontMapping) : text_buffer(buffer), length(len), font_map(fontMapping), typesetter(std::move(typesetter))
{
this->Reflow();
}
void Reflow() override
{
this->cur_offset = 0;
}
std::unique_ptr<const Line> NextLine(int max_width) override;
};
/** Get the width of an encoded sprite font character. */
static CGFloat SpriteFontGetWidth(void *ref_con)
{
FontSize fs = (FontSize)((size_t)ref_con >> 24);
WChar c = (WChar)((size_t)ref_con & 0xFFFFFF);
return GetGlyphWidth(fs, c);
}
static CTRunDelegateCallbacks _sprite_font_callback = {
kCTRunDelegateCurrentVersion, nullptr, nullptr, nullptr,
&SpriteFontGetWidth
};
/* static */ ParagraphLayouter *CoreTextParagraphLayoutFactory::GetParagraphLayout(CharType *buff, CharType *buff_end, FontMap &fontMapping)
{
if (!MacOSVersionIsAtLeast(10, 5, 0)) return nullptr;
/* Can't layout an empty string. */
ptrdiff_t length = buff_end - buff;
if (length == 0) return nullptr;
/* Can't layout our in-built sprite fonts. */
for (const auto &i : fontMapping) {
if (i.second->fc->IsBuiltInFont()) return nullptr;
}
/* Make attributed string with embedded font information. */
CFAutoRelease<CFMutableAttributedStringRef> str(CFAttributedStringCreateMutable(kCFAllocatorDefault, 0));
CFAttributedStringBeginEditing(str.get());
CFAutoRelease<CFStringRef> base(CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buff, length, kCFAllocatorNull));
CFAttributedStringReplaceString(str.get(), CFRangeMake(0, 0), base.get());
/* Apply font and colour ranges to our string. This is important to make sure
* that we get proper glyph boundaries on style changes. */
int last = 0;
for (const auto &i : fontMapping) {
if (i.first - last == 0) continue;
if (!_font_cache[i.second->fc->GetSize()]) {
/* Cache font information. */
CFAutoRelease<CFStringRef> font_name(CFStringCreateWithCString(kCFAllocatorDefault, i.second->fc->GetFontName(), kCFStringEncodingUTF8));
_font_cache[i.second->fc->GetSize()].reset(CTFontCreateWithName(font_name.get(), i.second->fc->GetFontSize(), nullptr));
}
CFAttributedStringSetAttribute(str.get(), CFRangeMake(last, i.first - last), kCTFontAttributeName, _font_cache[i.second->fc->GetSize()].get());
CGColorRef color = CGColorCreateGenericGray((uint8)i.second->colour / 255.0f, 1.0f); // We don't care about the real colours, just that they are different.
CFAttributedStringSetAttribute(str.get(), CFRangeMake(last, i.first - last), kCTForegroundColorAttributeName, color);
CGColorRelease(color);
/* Install a size callback for our special sprite glyphs. */
for (ssize_t c = last; c < i.first; c++) {
if (buff[c] >= SCC_SPRITE_START && buff[c] <= SCC_SPRITE_END) {
CFAutoRelease<CTRunDelegateRef> del(CTRunDelegateCreate(&_sprite_font_callback, (void *)(size_t)(buff[c] | (i.second->fc->GetSize() << 24))));
CFAttributedStringSetAttribute(str.get(), CFRangeMake(c, 1), kCTRunDelegateAttributeName, del.get());
}
}
last = i.first;
}
CFAttributedStringEndEditing(str.get());
/* Create and return typesetter for the string. */
CFAutoRelease<CTTypesetterRef> typesetter(CTTypesetterCreateWithAttributedString(str.get()));
return typesetter ? new CoreTextParagraphLayout(std::move(typesetter), buff, length, fontMapping) : nullptr;
}
/* virtual */ std::unique_ptr<const ParagraphLayouter::Line> CoreTextParagraphLayout::NextLine(int max_width)
{
if (this->cur_offset >= this->length) return nullptr;
/* Get line break position, trying word breaking first and breaking somewhere if that doesn't work. */
CFIndex len = CTTypesetterSuggestLineBreak(this->typesetter.get(), this->cur_offset, max_width);
if (len <= 0) len = CTTypesetterSuggestClusterBreak(this->typesetter.get(), this->cur_offset, max_width);
/* Create line. */
CFAutoRelease<CTLineRef> line(CTTypesetterCreateLine(this->typesetter.get(), CFRangeMake(this->cur_offset, len)));
this->cur_offset += len;
return std::unique_ptr<const Line>(line ? new CoreTextLine(std::move(line), this->font_map, this->text_buffer) : nullptr);
}
CoreTextParagraphLayout::CoreTextVisualRun::CoreTextVisualRun(CTRunRef run, Font *font, const CoreTextParagraphLayoutFactory::CharType *buff) : font(font)
{
this->glyphs.resize(CTRunGetGlyphCount(run));
/* Query map of glyphs to source string index. */
CFIndex map[this->glyphs.size()];
CTRunGetStringIndices(run, CFRangeMake(0, 0), map);
this->glyph_to_char.resize(this->glyphs.size());
for (size_t i = 0; i < this->glyph_to_char.size(); i++) this->glyph_to_char[i] = (int)map[i];
CGPoint pts[this->glyphs.size()];
CTRunGetPositions(run, CFRangeMake(0, 0), pts);
this->positions.resize(this->glyphs.size() * 2 + 2);
/* Convert glyph array to our data type. At the same time, substitute
* the proper glyphs for our private sprite glyphs. */
CGGlyph gl[this->glyphs.size()];
CTRunGetGlyphs(run, CFRangeMake(0, 0), gl);
for (size_t i = 0; i < this->glyphs.size(); i++) {
if (buff[this->glyph_to_char[i]] >= SCC_SPRITE_START && buff[this->glyph_to_char[i]] <= SCC_SPRITE_END) {
this->glyphs[i] = font->fc->MapCharToGlyph(buff[this->glyph_to_char[i]]);
this->positions[i * 2 + 0] = pts[i].x;
this->positions[i * 2 + 1] = font->fc->GetAscender() - font->fc->GetGlyph(this->glyphs[i])->height - 1; // Align sprite glyphs to font baseline.
} else {
this->glyphs[i] = gl[i];
this->positions[i * 2 + 0] = pts[i].x;
this->positions[i * 2 + 1] = pts[i].y;
}
}
this->total_advance = (int)CTRunGetTypographicBounds(run, CFRangeMake(0, 0), nullptr, nullptr, nullptr);
this->positions[this->glyphs.size() * 2] = this->positions[0] + this->total_advance;
}
/**
* Get the height of the line.
* @return The maximum height of the line.
*/
int CoreTextParagraphLayout::CoreTextLine::GetLeading() const
{
int leading = 0;
for (const auto &run : *this) {
leading = max(leading, run.GetLeading());
}
return leading;
}
/**
* Get the width of this line.
* @return The width of the line.
*/
int CoreTextParagraphLayout::CoreTextLine::GetWidth() const
{
if (this->size() == 0) return 0;
int total_width = 0;
for (const auto &run : *this) {
total_width += run.GetAdvance();
}
return total_width;
}
/** Delete CoreText font reference for a specific font size. */
void MacOSResetScriptCache(FontSize size)
{
_font_cache[size].reset();
}
/** Store current language locale as a CoreFounation locale. */
void MacOSSetCurrentLocaleName(const char *iso_code)
{
if (!MacOSVersionIsAtLeast(10, 5, 0)) return;
CFAutoRelease<CFStringRef> iso(CFStringCreateWithCString(kCFAllocatorDefault, iso_code, kCFStringEncodingUTF8));
_osx_locale.reset(CFLocaleCreate(kCFAllocatorDefault, iso.get()));
}
/**
* Compares two strings using case insensitive natural sort.
*
* @param s1 First string to compare.
* @param s2 Second string to compare.
* @return 1 if s1 < s2, 2 if s1 == s2, 3 if s1 > s2, or 0 if not supported by the OS.
*/
int MacOSStringCompare(const char *s1, const char *s2)
{
static bool supported = MacOSVersionIsAtLeast(10, 5, 0);
if (!supported) return 0;
CFStringCompareFlags flags = kCFCompareCaseInsensitive | kCFCompareNumerically | kCFCompareLocalized | kCFCompareWidthInsensitive | kCFCompareForcedOrdering;
CFAutoRelease<CFStringRef> cf1(CFStringCreateWithCString(kCFAllocatorDefault, s1, kCFStringEncodingUTF8));
CFAutoRelease<CFStringRef> cf2(CFStringCreateWithCString(kCFAllocatorDefault, s2, kCFStringEncodingUTF8));
/* If any CFString could not be created (e.g., due to UTF8 invalid chars), return OS unsupported functionality */
if (cf1 == nullptr || cf2 == nullptr) return 0;
return (int)CFStringCompareWithOptionsAndLocale(cf1.get(), cf2.get(), CFRangeMake(0, CFStringGetLength(cf1.get())), flags, _osx_locale.get()) + 2;
}
/* virtual */ void OSXStringIterator::SetString(const char *s)
{
const char *string_base = s;
this->utf16_to_utf8.clear();
this->str_info.clear();
this->cur_pos = 0;
/* CoreText operates on UTF-16, thus we have to convert the input string.
* To be able to return proper offsets, we have to create a mapping at the same time. */
std::vector<UniChar> utf16_str; ///< UTF-16 copy of the string.
while (*s != '\0') {
size_t idx = s - string_base;
WChar c = Utf8Consume(&s);
if (c < 0x10000) {
utf16_str.push_back((UniChar)c);
} else {
/* Make a surrogate pair. */
utf16_str.push_back((UniChar)(0xD800 + ((c - 0x10000) >> 10)));
utf16_str.push_back((UniChar)(0xDC00 + ((c - 0x10000) & 0x3FF)));
this->utf16_to_utf8.push_back(idx);
}
this->utf16_to_utf8.push_back(idx);
}
this->utf16_to_utf8.push_back(s - string_base);
/* Query CoreText for word and cluster break information. */
this->str_info.resize(utf16_to_utf8.size());
if (utf16_str.size() > 0) {
CFAutoRelease<CFStringRef> str(CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, &utf16_str[0], utf16_str.size(), kCFAllocatorNull));
/* Get cluster breaks. */
for (CFIndex i = 0; i < CFStringGetLength(str.get()); ) {
CFRange r = CFStringGetRangeOfComposedCharactersAtIndex(str.get(), i);
this->str_info[r.location].char_stop = true;
i += r.length;
}
/* Get word breaks. */
CFAutoRelease<CFStringTokenizerRef> tokenizer(CFStringTokenizerCreate(kCFAllocatorDefault, str.get(), CFRangeMake(0, CFStringGetLength(str.get())), kCFStringTokenizerUnitWordBoundary, _osx_locale.get()));
CFStringTokenizerTokenType tokenType = kCFStringTokenizerTokenNone;
while ((tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer.get())) != kCFStringTokenizerTokenNone) {
/* Skip tokens that are white-space or punctuation tokens. */
if ((tokenType & kCFStringTokenizerTokenHasNonLettersMask) != kCFStringTokenizerTokenHasNonLettersMask) {
CFRange r = CFStringTokenizerGetCurrentTokenRange(tokenizer.get());
this->str_info[r.location].word_stop = true;
}
}
}
/* End-of-string is always a valid stopping point. */
this->str_info.back().char_stop = true;
this->str_info.back().word_stop = true;
}
/* virtual */ size_t OSXStringIterator::SetCurPosition(size_t pos)
{
/* Convert incoming position to an UTF-16 string index. */
size_t utf16_pos = 0;
for (size_t i = 0; i < this->utf16_to_utf8.size(); i++) {
if (this->utf16_to_utf8[i] == pos) {
utf16_pos = i;
break;
}
}
/* Sanitize in case we get a position inside a grapheme cluster. */
while (utf16_pos > 0 && !this->str_info[utf16_pos].char_stop) utf16_pos--;
this->cur_pos = utf16_pos;
return this->utf16_to_utf8[this->cur_pos];
}
/* virtual */ size_t OSXStringIterator::Next(IterType what)
{
assert(this->cur_pos <= this->utf16_to_utf8.size());
assert(what == StringIterator::ITER_CHARACTER || what == StringIterator::ITER_WORD);
if (this->cur_pos == this->utf16_to_utf8.size()) return END;
do {
this->cur_pos++;
} 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));
return this->cur_pos == this->utf16_to_utf8.size() ? END : this->utf16_to_utf8[this->cur_pos];
}
/* virtual */ size_t OSXStringIterator::Prev(IterType what)
{
assert(this->cur_pos <= this->utf16_to_utf8.size());
assert(what == StringIterator::ITER_CHARACTER || what == StringIterator::ITER_WORD);
if (this->cur_pos == 0) return END;
do {
this->cur_pos--;
} while (this->cur_pos > 0 && (what == ITER_WORD ? !this->str_info[this->cur_pos].word_stop : !this->str_info[this->cur_pos].char_stop));
return this->utf16_to_utf8[this->cur_pos];
}
/* static */ StringIterator *OSXStringIterator::Create()
{
if (!MacOSVersionIsAtLeast(10, 5, 0)) return nullptr;
return new OSXStringIterator();
}
#else
void MacOSResetScriptCache(FontSize size) {}
void MacOSSetCurrentLocaleName(const char *iso_code) {}
int MacOSStringCompare(const char *s1, const char *s2)
{
return 0;
}
/* static */ StringIterator *OSXStringIterator::Create()
{
return nullptr;
}
/* static */ ParagraphLayouter *CoreTextParagraphLayoutFactory::GetParagraphLayout(CharType *buff, CharType *buff_end, FontMap &fontMapping)
{
return nullptr;
}
#endif /* (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) */
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