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-rw-r--r--frontends/cocoa/font.m243
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diff --git a/frontends/cocoa/font.m b/frontends/cocoa/font.m
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--- a/frontends/cocoa/font.m
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-/*
- * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-
-#import <Cocoa/Cocoa.h>
-
-#import "utils/nsoption.h"
-#import "netsurf/layout.h"
-#import "netsurf/plotters.h"
-
-#import "cocoa/coordinates.h"
-#import "cocoa/plotter.h"
-#import "cocoa/font.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];
-}