first step of TSpan

Example/examples/Text.js

@@ -8,7 +8,8 @@ import Svg, {
     Stop,
     Defs,
     Path,
-    G
+    G,
+    TSpan
 } from 'react-native-svg';
 
 class TextExample extends Component{
@@ -148,6 +149,33 @@ class TextPath extends Component{
     }
 }
 
+class TSpanExample extends Component{
+    static title = 'TSpan nest';
+
+    render() {
+
+        return <Svg
+            height="150"
+            width="300"
+        >
+            <Text y="20" dx="5 5">
+                <TSpan x="10" textAnchor="middle">tspan line 1</TSpan>
+                <TSpan x="10" dy="15">tspan line 2</TSpan>
+                <TSpan x="10" dx="10" dy="15">tspan line 3</TSpan>
+            </Text>
+            <Text x="10" y="60" fill="red" fontSize="14">
+                <TSpan dy="5 10 20" >12345</TSpan>
+                <TSpan fill="blue" dy="15" dx="0 5 5">
+                    <TSpan>6</TSpan>
+                    <TSpan>7</TSpan>
+                </TSpan>
+                <TSpan dx="0 10 20" dy="0 20" fontWeight="bold" fontSize="12">89a</TSpan>
+            </Text>
+            <Text y="140" dx="0 5 5" dy="0 -5 -5">delta on text</Text>
+        </Svg>;
+    }
+}
+
 const icon = <Svg
     height="20"
     width="20"
@@ -168,7 +196,8 @@ const samples = [
     TextRotate,
     TextStroke,
     TextFill,
-    TextPath
+    TextPath,
+    TSpanExample
 ];
 
 export {

elements/TSpan.js

@@ -0,0 +1,40 @@
+import React, {PropTypes} from 'react';
+import createReactNativeComponentClass from 'react/lib/createReactNativeComponentClass';
+import {numberProp, pathProps} from '../lib/props';
+import {TSpanAttributes} from '../lib/attributes';
+import extractFrame from '../lib/extract/extractFrame';
+import Shape from './Shape';
+
+class TSpan extends Shape {
+    static displayName = 'TSpan';
+
+    static propTypes = {
+        ...pathProps,
+        dx: numberProp,
+        dy: numberProp,
+        textAnchor: PropTypes.oneOf(['start', 'middle', 'end']),
+        fontFamily: PropTypes.string,
+        fontSize: numberProp,
+        fontWeight: PropTypes.string,
+        fontStyle: PropTypes.string,
+        font: PropTypes.object
+    };
+
+    setNativeProps = (...args) => {
+        this.root.setNativeProps(...args);
+    };
+
+    render() {
+        return <RNSVGTSpan
+            ref={ele => {this.root = ele;}}
+            {...extractFrame(this.props)}
+        />;
+    }
+}
+
+const RNSVGTSpan = createReactNativeComponentClass({
+    validAttributes: TSpanAttributes,
+    uiViewClassName: 'RNSVGTSpan'
+});
+
+export default TSpan;

elements/Text.js

@@ -13,18 +13,11 @@ class Text extends Shape {
         dx: numberProp,
         dy: numberProp,
         textAnchor: PropTypes.oneOf(['start', 'middle', 'end']),
-        path: PropTypes.string,
         fontFamily: PropTypes.string,
         fontSize: numberProp,
         fontWeight: PropTypes.string,
         fontStyle: PropTypes.string,
-        font: PropTypes.object,
-        lines: numberProp
-    };
-
-    static defaultProps = {
-        dx: 0,
-        dy: 0
+        font: PropTypes.object
     };
 
     setNativeProps = (...args) => {
@@ -33,19 +26,9 @@ class Text extends Shape {
 
     render() {
         let props = this.props;
-
-        let x = 0;
-        if (props.x) {
-            x = props.dx ? +props.x + (+props.dx) : +props.x;
-        }
-        let y = 0;
-        if (props.y) {
-            y = props.dy ? +props.y + (+props.dy) : +props.y;
-        }
-
         return <RNSVGText
             ref={ele => {this.root = ele;}}
-            {...this.extractProps({...props, x, y})}
+            {...this.extractProps({...props})}
             {...extractText(props)}
         />;
     }

ios/Text/RNSVGTSpan.h

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2015-present, Horcrux.
+ * All rights reserved.
+ *
+ * This source code is licensed under the MIT-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <Foundation/Foundation.h>
+#import "RNSVGPath.h"
+#import "RNSVGTextFrame.h"
+
+@interface RNSVGText : RNSVGPath
+
+@property (nonatomic, assign) CTTextAlignment alignment;
+@property (nonatomic, assign) RNSVGTextFrame textFrame;
+@property (nonatomic, assign) NSString
+
+@end

ios/Text/RNSVGTSpan.m

@@ -0,0 +1,136 @@
+/**
+ * Copyright (c) 2015-present, Horcrux.
+ * All rights reserved.
+ *
+ * This source code is licensed under the MIT-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RNSVGText.h"
+#import "RNSVGBezierPath.h"
+#import <CoreText/CoreText.h>
+
+@implementation RNSVGText
+
+static void RNSVGFreeTextFrame(RNSVGTextFrame frame)
+{
+    if (frame.count) {
+        // We must release each line before freeing up this struct
+        for (int i = 0; i < frame.count; i++) {
+            CFRelease(frame.lines[i]);
+        }
+        free(frame.lines);
+        free(frame.widths);
+    }
+}
+
+- (void)setAlignment:(CTTextAlignment)alignment
+{
+    [self invalidate];
+    _alignment = alignment;
+}
+
+- (void)setTextFrame:(RNSVGTextFrame)textFrame
+{
+    RNSVGFreeTextFrame(_textFrame);
+    [self invalidate];
+    _textFrame = textFrame;
+}
+
+- (void)setPath:(NSArray *)path
+{
+    if (path == _path) {
+        return;
+    }
+    [self invalidate];
+    _path = path;
+}
+
+- (void)dealloc
+{
+    RNSVGFreeTextFrame(_textFrame);
+}
+
+- (CGPathRef)getPath:(CGContextRef)context
+{
+    CGMutablePathRef path = CGPathCreateMutable();
+    RNSVGTextFrame frame = self.textFrame;
+    for (int i = 0; i < frame.count; i++) {
+        CGFloat shift;
+        CGFloat width = frame.widths[i];
+        switch (self.alignment) {
+            case kCTTextAlignmentRight:
+                shift = width;
+                break;
+            case kCTTextAlignmentCenter:
+                shift = width / 2;
+                break;
+            default:
+                shift = 0;
+                break;
+        }
+        // We should consider snapping this shift to device pixels to improve rendering quality
+        // when a line has subpixel width.
+        CGAffineTransform offset = CGAffineTransformMakeTranslation(-shift, frame.baseLine + frame.lineHeight * i + (self.path ? -frame.lineHeight : 0));
+        
+        CGMutablePathRef line = [self setLinePath:frame.lines[i]];
+        CGPathAddPath(path, &offset, line);
+        CGPathRelease(line);
+    }
+    
+    return (CGPathRef)CFAutorelease(path);
+}
+
+- (CGMutablePathRef)setLinePath:(CTLineRef)line
+{
+    CGAffineTransform upsideDown = CGAffineTransformMakeScale(1.0, -1.0);
+    CGMutablePathRef path = CGPathCreateMutable();
+    
+    CFArrayRef glyphRuns = CTLineGetGlyphRuns(line);
+    CTRunRef run = CFArrayGetValueAtIndex(glyphRuns, 0);
+    
+    CFIndex runGlyphCount = CTRunGetGlyphCount(run);
+    CGPoint positions[runGlyphCount];
+    CGGlyph glyphs[runGlyphCount];
+    
+    // Grab the glyphs, positions, and font
+    CTRunGetPositions(run, CFRangeMake(0, 0), positions);
+    CTRunGetGlyphs(run, CFRangeMake(0, 0), glyphs);
+    CFDictionaryRef attributes = CTRunGetAttributes(run);
+    
+    CTFontRef runFont = CFDictionaryGetValue(attributes, kCTFontAttributeName);
+    
+    RNSVGBezierPath *bezierPath = [[RNSVGBezierPath alloc] initWithBezierCurves:self.path];
+    
+    for(CFIndex i = 0; i < runGlyphCount; ++i) {
+        CGPathRef letter = CTFontCreatePathForGlyph(runFont, glyphs[i], nil);
+        CGPoint point = positions[i];
+        
+        if (letter) {
+            CGAffineTransform transform;
+            
+            // draw glyphs along path
+            if (self.path) {
+                transform = [bezierPath transformAtDistance:point.x];
+                
+                // break loop if line reaches the end of the Path.
+                if (!transform.a || !transform.d) {
+                    CGPathRelease(letter);
+                    break;
+                }
+                transform = CGAffineTransformScale(transform, 1.0, -1.0);
+            } else {
+                transform = CGAffineTransformTranslate(upsideDown, point.x, point.y);
+            }
+            
+            
+            CGPathAddPath(path, &transform, letter);
+        }
+        
+        CGPathRelease(letter);
+    }
+    
+    return path;
+}
+
+@end

lib/attributes.js

@@ -17,30 +17,6 @@ function arrayDiffer(a, b) {
     return false;
 }
 
-function fontAndLinesDiffer(a, b) {
-    if (a === b) {
-        return false;
-    }
-    if (a.font !== b.font) {
-        if (a.font === null) {
-            return true;
-        }
-        if (b.font === null) {
-            return true;
-        }
-
-        if (
-            a.font.fontFamily !== b.font.fontFamily ||
-            a.font.fontSize !== b.font.fontSize ||
-            a.font.fontWeight !== b.font.fontWeight ||
-            a.font.fontStyle !== b.font.fontStyle
-        ) {
-            return true;
-        }
-    }
-    return arrayDiffer(a.lines, b.lines);
-}
-
 const ViewBoxAttributes = {
     minX: true,
     minY: true,
@@ -104,16 +80,22 @@ const PathAttributes = merge({
     }
 }, RenderableAttributes);
 
-const TextAttributes = merge({
-    alignment: true,
-    frame: {
-        diff: fontAndLinesDiffer
-    },
-    path: {
-        diff: arrayDiffer
-    }
+const FontAttributes = merge({
+    fontFamily: true,
+    fontSize: true,
+    fontWeight: true,
+    fontStyle: true
 }, RenderableAttributes);
 
+const TSpanAttributes = merge({
+    line: true
+}, FontAttributes);
+
+
+const TextAttributes = merge({
+    alignment: true
+}, FontAttributes);
+
 const ClipPathAttributes = {
     name: true
 };
@@ -184,6 +166,7 @@ const RectAttributes = merge({
 export {
     PathAttributes,
     TextAttributes,
+    TSpanAttributes,
     GroupAttributes,
     ClipPathAttributes,
     CircleAttributes,

lib/extract/extractFrame.js

@@ -0,0 +1,21 @@
+import extractSpan from './extractSpan';
+import extractTextContent from './extractTextContent';
+
+export default function (props) {
+    let {children, line} = props;
+    let extractedProps = extractSpan(props);
+
+    if (typeof children === 'string') {
+        line = children;
+        children = null;
+    } else {
+        children = extractTextContent(props.children);
+        line = null;
+    }
+    console.log(extractedProps);
+    return {
+        ...extractedProps,
+        children,
+        line
+    };
+};

lib/extract/extractSpan.js

@@ -0,0 +1,76 @@
+import React, {
+    Children
+} from 'react';
+
+import TSpan from '../../elements/TSpan';
+import extractTextContent from './extractTextContent';
+import SerializablePath from '../SerializablePath';
+import _ from 'lodash';
+const fontRegExp = /^\s*((?:(?:normal|bold|italic)\s+)*)(?:(\d+(?:\.\d+)?)[ptexm%]*(?:\s*\/.*?)?\s+)?\s*"?([^"]*)/i;
+const fontFamilyPrefix = /^[\s"']*/;
+const fontFamilySuffix = /[\s"']*$/;
+const spaceReg = /\s+/;
+const commaReg = /,/;
+
+let cachedFontObjectsFromString = {};
+
+function extractSingleFontFamily(fontFamilyString) {
+    // SVG on the web allows for multiple font-families to be specified.
+    // For compatibility, we extract the first font-family, hoping
+    // we'll get a match.
+    return fontFamilyString ? fontFamilyString.split(commaReg)[0]
+        .replace(fontFamilyPrefix, '')
+        .replace(fontFamilySuffix, '') : null;
+}
+
+function parseFontString(font) {
+    if (cachedFontObjectsFromString.hasOwnProperty(font)) {
+        return cachedFontObjectsFromString[font];
+    }
+    let match = fontRegExp.exec(font);
+    if (!match) {
+        return null;
+    }
+    let fontFamily = extractSingleFontFamily(match[3]);
+    let fontSize = +match[2] || 12;
+    let isBold = /bold/.exec(match[1]);
+    let isItalic = /italic/.exec(match[1]);
+    cachedFontObjectsFromString[font] = {
+        fontFamily: fontFamily,
+        fontSize: fontSize,
+        fontWeight: isBold ? 'bold' : 'normal',
+        fontStyle: isItalic ? 'italic' : 'normal'
+    };
+    return cachedFontObjectsFromString[font];
+}
+
+function extractFont(props) {
+    let font = props.font;
+    let fontSize = +props.fontSize;
+
+    let ownedFont = {
+        fontFamily: extractSingleFontFamily(props.fontFamily),
+        fontSize: isNaN(fontSize) ? null : fontSize,
+        fontWeight: props.fontWeight,
+        fontStyle: props.fontStyle
+    };
+
+    if (typeof props.font === 'string') {
+        font = parseFontString(props.font);
+    }
+    ownedFont = _.pickBy(ownedFont, prop => !_.isNil(prop));
+
+    return _.defaults(ownedFont, font);
+}
+
+function parseDelta(delta) {
+    return delta.toString().split(spaceReg);
+}
+
+export default function(props) {
+    return {
+        dx: parseDelta(props.dx || ''),
+        dy: parseDelta(props.dy || ''),
+        ...extractFont(props)
+    };
+}

lib/extract/extractText.js

@@ -1,93 +1,43 @@
-import SerializablePath from '../SerializablePath';
-import _ from 'lodash';
-const newLine = /\n/g;
-const defaultFontFamily = '"Helvetica Neue", "Helvetica", Arial';
-const fontRegExp = /^\s*((?:(?:normal|bold|italic)\s+)*)(?:(\d+(?:\.\d+)?)[ptexm%]*(?:\s*\/.*?)?\s+)?\s*"?([^"]*)/i;
-const fontFamilyPrefix = /^[\s"']*/;
-const fontFamilySuffix = /[\s"']*$/;
-let cachedFontObjectsFromString = {};
+import extractTextContent from './extractTextContent';
+import extractSpan from './extractSpan';
 
-function childrenAsString(children) {
-    if (!children) {
-        return '';
-    }
-    if (typeof children === 'string') {
-        return children;
-    }
-    if (children.length) {
-        return children.join('\n');
-    }
-    return '';
-}
-
-function extractFontAndLines(font, text) {
-    return {
-        font: extractFont(font),
-        lines: text.split(newLine)
-    };
-}
-
-function extractSingleFontFamily(fontFamilyString = defaultFontFamily) {
-    // SVG on the web allows for multiple font-families to be specified.
-    // For compatibility, we extract the first font-family, hoping
-    // we'll get a match.
-    return fontFamilyString.split(',')[0]
-        .replace(fontFamilyPrefix, '')
-        .replace(fontFamilySuffix, '');
-}
-
-function parseFontString(font) {
-    if (cachedFontObjectsFromString.hasOwnProperty(font)) {
-        return cachedFontObjectsFromString[font];
-    }
-    let match = fontRegExp.exec(font);
-    if (!match) {
-        return null;
-    }
-    let fontFamily = extractSingleFontFamily(match[3]);
-    let fontSize = +match[2] || 12;
-    let isBold = /bold/.exec(match[1]);
-    let isItalic = /italic/.exec(match[1]);
-    cachedFontObjectsFromString[font] = {
-        fontFamily: fontFamily,
-        fontSize: fontSize,
-        fontWeight: isBold ? 'bold' : 'normal',
-        fontStyle: isItalic ? 'italic' : 'normal'
-    };
-    return cachedFontObjectsFromString[font];
-}
-
-function extractFont(font) {
-    if (_.isNil(font)) {
-        return null;
-    }
-    if (typeof font === 'string') {
-        return parseFontString(font);
-    }
-    let fontFamily = extractSingleFontFamily(font.fontFamily);
-    let fontSize = +font.fontSize || 12;
-
-    return {
-        fontFamily: fontFamily,
-        fontSize: fontSize,
-        fontWeight: font.fontWeight,
-        fontStyle: font.fontStyle
-    };
-}
-
-const anchord = {
+const anchors = {
     end: 1,
     middle: 2,
     start: 0
 };
 
 export default function(props) {
+    let children = extractTextContent(props.children);
+    let extractedProps = extractSpan(props);
+    let firstSpan = children[0];
+    let alignment;
+    let {dx, dy} = extractedProps;
+    let maxDeltaLength = Math.max(dx.length, dy.length);
+
+    if (firstSpan && firstSpan.props.hasOwnProperty('textAnchor')) {
+        alignment = anchors[firstSpan.props.textAnchor];
+    } else if (anchors[props.textAnchor]) {
+        alignment = anchors[props.textAnchor];
+    }
+
+    if (!alignment) {
+        alignment = 0;
+    }
+
+    for (let i = 0; i < maxDeltaLength; i++) {
+        console.log(i);
+    }
+
+    console.log(extractedProps);
+
     return {
-        alignment: anchord[props.textAnchor] || 0,
-        frame: extractFontAndLines(
-            props,
-            childrenAsString(props.children)
-        ),
-        path: props.path ? new SerializablePath(props.path).toJSON() : undefined
-    };
+        alignment,
+        children,
+        fontFamily: 'Helvetica Neue',
+        fontSize: 12,
+        fontStyle: 'normal',
+        fontWeight: 'normal',
+        ...extractedProps
+    }
 }

lib/extract/extractTextContent.js

@@ -0,0 +1,26 @@
+import React, {
+    Children
+} from 'react';
+
+import TSpan from '../../elements/TSpan';
+const newLine = /\n/g;
+
+export default function(children) {
+    let spans = [];
+
+    Children.forEach(children, function (child = '') {
+        let span;
+        if (typeof child === 'string') {
+            span = <TSpan>{child.replace(newLine, ' ')}</TSpan>;
+        } else if (child.type === TSpan) {
+            span = child;
+        } else {
+            // give warning about the illegal child type
+            return;
+        }
+
+        spans.push(span);
+    });
+
+    return spans;
+}