From d21447d096a320a08b3efb2b8768fad0dcdcfd64 Mon Sep 17 00:00:00 2001 From: Vincent Sanders Date: Thu, 5 May 2016 22:28:51 +0100 Subject: move frontends into sub directory --- frontends/cocoa/font.m | 243 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 frontends/cocoa/font.m (limited to 'frontends/cocoa/font.m') diff --git a/frontends/cocoa/font.m b/frontends/cocoa/font.m new file mode 100644 index 000000000..f52ec85bc --- /dev/null +++ b/frontends/cocoa/font.m @@ -0,0 +1,243 @@ +/* + * Copyright 2011 Sven Weidauer + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf 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 of the License. + * + * NetSurf 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 this program. If not, see . + */ + +#import + +#import "cocoa/plotter.h" +#import "cocoa/font.h" + +#import "utils/nsoption.h" +#import "desktop/gui_layout.h" +#import "desktop/plotters.h" + + +static NSLayoutManager *cocoa_prepare_layout_manager( const char *string, size_t length, + const plot_font_style_t *style ); + +static CGFloat cocoa_layout_width( NSLayoutManager *layout ); +static CGFloat cocoa_layout_width_chars( NSLayoutManager *layout, size_t characters ); +static NSUInteger cocoa_glyph_for_location( NSLayoutManager *layout, CGFloat x ); +static size_t cocoa_bytes_for_characters( const char *string, size_t characters ); +static NSDictionary *cocoa_font_attributes( const plot_font_style_t *style ); + +static NSTextStorage *cocoa_text_storage = nil; +static NSTextContainer *cocoa_text_container = nil; + +static nserror cocoa_font_width(const plot_font_style_t *style, + const char *string, size_t length, + int *width) +{ + NSLayoutManager *layout; + layout = cocoa_prepare_layout_manager( string, length, style ); + *width = cocoa_layout_width( layout ); + return NSERROR_OK; +} + +static nserror cocoa_font_position(const plot_font_style_t *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x) +{ + NSLayoutManager *layout = cocoa_prepare_layout_manager( string, length, style ); + if (layout == nil) { + return NSERROR_BAD_PARAMETER; + } + + NSUInteger glyphIndex = cocoa_glyph_for_location( layout, x ); + NSUInteger chars = [layout characterIndexForGlyphAtIndex: glyphIndex]; + + if (chars >= [cocoa_text_storage length]) *char_offset = length; + else *char_offset = cocoa_bytes_for_characters( string, chars ); + + *actual_x = cocoa_pt_to_px( NSMaxX( [layout boundingRectForGlyphRange: NSMakeRange( glyphIndex - 1, 1 ) + inTextContainer: cocoa_text_container] ) ); + + return NSERROR_OK; +} + +static nserror cocoa_font_split(const plot_font_style_t *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x) +{ + NSLayoutManager *layout = cocoa_prepare_layout_manager( string, length, style ); + if (layout == nil) return NSERROR_BAD_PARAMETER; + + NSUInteger glyphIndex = cocoa_glyph_for_location( layout, x ); + NSUInteger chars = [layout characterIndexForGlyphAtIndex: glyphIndex]; + + if (chars >= [cocoa_text_storage length]) { + *char_offset = length; + *actual_x = cocoa_layout_width( layout ); + return NSERROR_OK; + } + + + chars = [[cocoa_text_storage string] rangeOfString: @" " options: NSBackwardsSearch range: NSMakeRange( 0, chars + 1 )].location; + if (chars == NSNotFound) { + *char_offset = 0; + *actual_x = 0; + return NSERROR_OK; + } + + *char_offset = cocoa_bytes_for_characters( string, chars ); + *actual_x = cocoa_layout_width_chars( layout, chars ); + + return NSERROR_OK; +} + + +static struct gui_layout_table layout_table = { + .width = cocoa_font_width, + .position = cocoa_font_position, + .split = cocoa_font_split, +}; + +struct gui_layout_table *cocoa_layout_table = &layout_table; + + +#pragma mark - + +void cocoa_draw_string( CGFloat x, CGFloat y, const char *bytes, size_t length, const plot_font_style_t *style ) +{ + NSLayoutManager *layout = cocoa_prepare_layout_manager( bytes, length, style ); + if (layout == nil) return; + + NSFont *font = [cocoa_text_storage attribute: NSFontAttributeName atIndex: 0 effectiveRange: NULL]; + CGFloat baseline = [layout defaultLineHeightForFont: font] * 3.0 / 4.0; + + NSRange glyphRange = [layout glyphRangeForTextContainer: cocoa_text_container]; + [layout drawGlyphsForGlyphRange: glyphRange atPoint: NSMakePoint( x, y - baseline )]; +} + + +#pragma mark - + +static inline CGFloat cocoa_layout_width( NSLayoutManager *layout ) +{ + if (layout == nil) return 0.0; + + return cocoa_pt_to_px( NSWidth( [layout usedRectForTextContainer: cocoa_text_container] ) ); +} + +static inline CGFloat cocoa_layout_width_chars( NSLayoutManager *layout, size_t characters ) +{ + NSUInteger glyphIndex = [layout glyphIndexForCharacterAtIndex: characters]; + return cocoa_pt_to_px( [layout locationForGlyphAtIndex: glyphIndex].x ); +} + +static inline NSUInteger cocoa_glyph_for_location( NSLayoutManager *layout, CGFloat x ) +{ + CGFloat fraction = 0.0; + NSUInteger glyphIndex = [layout glyphIndexForPoint: NSMakePoint( cocoa_px_to_pt( x ), 0 ) + inTextContainer: cocoa_text_container + fractionOfDistanceThroughGlyph: &fraction]; + if (fraction >= 1.0) ++glyphIndex; + return glyphIndex; +} + +static inline size_t cocoa_bytes_for_characters( const char *string, size_t chars ) +{ + size_t offset = 0; + while (chars-- > 0) { + uint8_t ch = ((uint8_t *)string)[offset]; + + if (0xC2 <= ch && ch <= 0xDF) offset += 2; + else if (0xE0 <= ch && ch <= 0xEF) offset += 3; + else if (0xF0 <= ch && ch <= 0xF4) offset += 4; + else offset++; + } + return offset; +} + +static NSLayoutManager *cocoa_prepare_layout_manager( const char *bytes, size_t length, + const plot_font_style_t *style ) +{ + if (NULL == bytes || 0 == length) return nil; + + NSString *string = [[[NSString alloc] initWithBytes: bytes length:length encoding:NSUTF8StringEncoding] autorelease]; + if (string == nil) return nil; + + static NSLayoutManager *layout = nil; + if (nil == layout) { + cocoa_text_container = [[NSTextContainer alloc] initWithContainerSize: NSMakeSize( CGFLOAT_MAX, CGFLOAT_MAX )]; + [cocoa_text_container setLineFragmentPadding: 0]; + + layout = [[NSLayoutManager alloc] init]; + [layout addTextContainer: cocoa_text_container]; + } + + static NSString *oldString = 0; + static plot_font_style_t oldStyle = { 0, 0, 0, 0, 0, 0 }; + + const bool styleChanged = memcmp( style, &oldStyle, sizeof oldStyle ) != 0; + + if ([oldString isEqualToString: string] && !styleChanged) { + return layout; + } + + [oldString release]; + oldString = [string copy]; + oldStyle = *style; + + static NSDictionary *attributes = nil; + if (styleChanged || attributes == nil) { + [attributes release]; + attributes = [cocoa_font_attributes( style ) retain]; + } + + [cocoa_text_storage release]; + cocoa_text_storage = [[NSTextStorage alloc] initWithString: string attributes: attributes]; + [cocoa_text_storage addLayoutManager: layout]; + + [layout ensureLayoutForTextContainer: cocoa_text_container]; + + return layout; +} + +static NSString * const cocoa_font_families[PLOT_FONT_FAMILY_COUNT] = { + [PLOT_FONT_FAMILY_SERIF] = @"Times", + [PLOT_FONT_FAMILY_SANS_SERIF] = @"Helvetica", + [PLOT_FONT_FAMILY_MONOSPACE] = @"Courier", + [PLOT_FONT_FAMILY_CURSIVE] = @"Apple Chancery", + [PLOT_FONT_FAMILY_FANTASY] = @"Marker Felt" +}; + +static inline NSFont *cocoa_font_get_nsfont( const plot_font_style_t *style ) +{ + NSFont *font = [NSFont fontWithName: cocoa_font_families[style->family] + size: (CGFloat)style->size / FONT_SIZE_SCALE]; + + NSFontTraitMask traits = 0; + if (style->flags & FONTF_ITALIC || style->flags & FONTF_OBLIQUE) traits |= NSItalicFontMask; + if (style->flags & FONTF_SMALLCAPS) traits |= NSSmallCapsFontMask; + if (style->weight > 400) traits |= NSBoldFontMask; + + if (0 != traits) { + NSFontManager *fm = [NSFontManager sharedFontManager]; + font = [fm convertFont: font toHaveTrait: traits]; + } + + return font; +} + +static inline NSDictionary *cocoa_font_attributes( const plot_font_style_t *style ) +{ + return [NSDictionary dictionaryWithObjectsAndKeys: + cocoa_font_get_nsfont( style ), NSFontAttributeName, + cocoa_convert_colour( style->foreground ), NSForegroundColorAttributeName, + nil]; +} -- cgit v1.2.3