Port new GlyphContext, FontData, enums, props, Bezier and text rendering

2026-05-30 05:31:01 +00:00 · 2017-08-23 05:41:35 +03:00
parent 3cafc34cb2
commit ccb8729917
105 changed files with 10437 additions and 105 deletions
@@ -0,0 +1,49 @@
+#include "PropHelper.h"
+@implementation PropHelper
+
+ (double)fromRelativeWithNSString:(NSString *)length
+                          relative:(double)relative
+                            offset:(double)offset
+                             scale:(double)scale
+                          fontSize:(double)fontSize {
+    length = [length stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
+    NSUInteger stringLength = [length length];
+    NSInteger percentIndex = stringLength - 1;
+    if (stringLength == 0) {
+        return offset;
+    }
+    else if ([length characterAtIndex:percentIndex] == '%') {
+        return [[length substringWithRange:NSMakeRange(0, percentIndex)] doubleValue] / 100 * relative + offset;
+    }
+    else {
+        NSInteger twoLetterUnitIndex = stringLength - 2;
+        if (twoLetterUnitIndex > 0) {
+            NSString *lastTwo = [length substringFromIndex:twoLetterUnitIndex];
+            NSUInteger end = twoLetterUnitIndex;
+            double unit = 1;
+            if ([lastTwo isEqualToString:@"px"]) {
+                
+            } else if ([lastTwo isEqualToString:@"em"]) {
+                unit = fontSize;
+            } else if ([lastTwo isEqualToString:@"pt"]) {
+                unit = 1.25;
+            } else if ([lastTwo isEqualToString:@"pc"]) {
+                unit = 15;
+            } else if ([lastTwo isEqualToString:@"mm"]) {
+                unit = 3.543307;
+            } else if ([lastTwo isEqualToString:@"cm"]) {
+                unit = 35.43307;
+            } else if ([lastTwo isEqualToString:@"in"]) {
+                unit = 90;
+            } else {
+                end = stringLength;
+            }
+            
+            return [[length substringWithRange:NSMakeRange(0, end)] doubleValue] * unit * scale + offset;
+        } else {
+            return [length doubleValue] * scale + offset;
+        }
+    }
+}
+
+@end