96 lines
3.2 KiB
Mathematica
96 lines
3.2 KiB
Mathematica
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//
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// HFRepresenterHexTextView.m
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// HexFiend_2
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//
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// Copyright 2007 ridiculous_fish. All rights reserved.
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//
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#import <HexFiend/HFRepresenterHexTextView.h>
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#import <HexFiend/HFRepresenterTextView_Internal.h>
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#import <HexFiend/HFHexTextRepresenter.h>
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@implementation HFRepresenterHexTextView
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- (void)generateGlyphTable {
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const UniChar hexchars[17] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F',' '/* Plus a space char at the end for null bytes. */};
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_Static_assert(sizeof(CGGlyph[17]) == sizeof(glyphTable), "glyphTable is the wrong type");
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NSFont *font = [[self font] screenFont];
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bool t = CTFontGetGlyphsForCharacters((CTFontRef)font, hexchars, glyphTable, 17);
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HFASSERT(t); // We don't take kindly to strange fonts around here.
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CGFloat maxAdv = 0.0;
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for(int i = 0; i < 17; i++) maxAdv = HFMax(maxAdv, [font advancementForGlyph:glyphTable[i]].width);
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glyphAdvancement = maxAdv;
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spaceAdvancement = maxAdv;
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}
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- (void)setFont:(NSFont *)font {
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[super setFont:font];
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[self generateGlyphTable];
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}
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- (instancetype)initWithCoder:(NSCoder *)coder {
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HFASSERT([coder allowsKeyedCoding]);
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self = [super initWithCoder:coder];
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[self generateGlyphTable];
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return self;
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}
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//no need for encodeWithCoder
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- (void)extractGlyphsForBytes:(const unsigned char *)bytes count:(NSUInteger)numBytes offsetIntoLine:(NSUInteger)offsetIntoLine intoArray:(struct HFGlyph_t *)glyphs advances:(CGSize *)advances resultingGlyphCount:(NSUInteger *)resultGlyphCount {
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HFASSERT(bytes != NULL);
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HFASSERT(glyphs != NULL);
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HFASSERT(numBytes <= NSUIntegerMax);
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HFASSERT(resultGlyphCount != NULL);
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const NSUInteger bytesPerColumn = [self bytesPerColumn];
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NSUInteger glyphIndex = 0, byteIndex = 0;
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NSUInteger remainingBytesInThisColumn = (bytesPerColumn ? bytesPerColumn - offsetIntoLine % bytesPerColumn : NSUIntegerMax);
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CGFloat advanceBetweenColumns = [self advanceBetweenColumns];
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while (byteIndex < numBytes) {
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unsigned char byte = bytes[byteIndex++];
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CGFloat glyphAdvancementPlusAnySpace = glyphAdvancement;
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if (--remainingBytesInThisColumn == 0) {
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remainingBytesInThisColumn = bytesPerColumn;
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glyphAdvancementPlusAnySpace += advanceBetweenColumns;
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}
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BOOL useBlank = (hidesNullBytes && byte == 0);
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advances[glyphIndex] = CGSizeMake(glyphAdvancement, 0);
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glyphs[glyphIndex++] = (struct HFGlyph_t){.fontIndex = 0, .glyph = glyphTable[(useBlank? 16: byte >> 4)]};
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advances[glyphIndex] = CGSizeMake(glyphAdvancementPlusAnySpace, 0);
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glyphs[glyphIndex++] = (struct HFGlyph_t){.fontIndex = 0, .glyph = glyphTable[(useBlank? 16: byte & 0xF)]};
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}
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*resultGlyphCount = glyphIndex;
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}
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- (CGFloat)advancePerCharacter {
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return 2 * glyphAdvancement;
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}
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- (CGFloat)advanceBetweenColumns {
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return glyphAdvancement;
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}
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- (NSUInteger)maximumGlyphCountForByteCount:(NSUInteger)byteCount {
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return 2 * byteCount;
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}
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- (BOOL)hidesNullBytes {
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return hidesNullBytes;
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}
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- (void)setHidesNullBytes:(BOOL)flag
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{
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flag = !! flag;
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if (hidesNullBytes != flag) {
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hidesNullBytes = flag;
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[self setNeedsDisplay:YES];
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}
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}
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@end
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