Add gradient elements and examples

Add gradient elements and examples

Example/examples.js

@@ -10,6 +10,7 @@ import * as Text from './examples/Text';
 import * as G from './examples/G';
 import * as Stroking from './examples/Stroking';
 import * as Use from './examples/Use';
+import * as Gradients from './examples/Gradients';
 
 export {
     Svg,
@@ -23,5 +24,6 @@ export {
     Text,
     Stroking,
     G,
-    Use
+    Use,
+    Gradients
 };

Example/examples/Gradients.js

@@ -0,0 +1,121 @@
+import React, {
+    Component
+} from 'react-native';
+
+import Svg, {
+    Defs,
+    LinearGradient,
+    RadialGradient,
+    Stop,
+    Ellipse,
+    Circle
+} from 'react-native-art-svg';
+
+class LinearGradientHorizontal extends Component{
+    static title = 'Define an ellipse with a horizontal linear gradient from yellow to red';
+    render() {
+        return <Svg
+            height="150"
+            width="300"
+        >
+            <Defs>
+                <LinearGradient id="grad" x1="0" y1="0" x2="170" y2="0">
+                    <Stop offset="0%" stopColor="rgb(255,255,0)" stopOpacity="0" />
+                    <Stop offset="100%" stopColor="red" stopOpacity="1" />
+                </LinearGradient>
+            </Defs>
+            <Ellipse cx="150" cy="75" rx="85" ry="55" fill="url(#grad)" />
+        </Svg>;
+    }
+}
+
+class LinearGradientVertical  extends Component{
+    static title = 'Define an ellipse with a horizontal linear gradient from yellow to red';
+    render() {
+        return <Svg
+            height="150"
+            width="300"
+        >
+            <Defs>
+                <LinearGradient id="grad" x1="0" y1="0" x2="0" y2="150">
+                    <Stop offset="0%" stopColor="rgb(255,255,0)" stopOpacity="0" />
+                    <Stop offset="100%" stopColor="red" stopOpacity="1" />
+                </LinearGradient>
+            </Defs>
+            <Ellipse cx="150" cy="75" rx="85" ry="55" fill="url(#grad)" />
+        </Svg>;
+    }
+}
+
+class RadialGradientExample  extends Component{
+    static title = 'Define an ellipse with a radial gradient from yellow to purple';
+    render() {
+        return <Svg
+            height="150"
+            width="300"
+        >
+            <Defs>
+                <RadialGradient id="grad" cx="150" cy="75" rx="85" ry="55" fx="150" fy="75">
+                    <Stop
+                        offset="0%"
+                        stopColor="#ff0"
+                        stopOpacity="1"
+                    />
+                    <Stop
+                        offset="100%"
+                        stopColor="#83a"
+                        stopOpacity="1"
+                    />
+                </RadialGradient>
+            </Defs>
+            <Ellipse cx="150" cy="75" rx="85" ry="55" fill="url(#grad)" />
+        </Svg>;
+    }
+}
+
+class RadialGradientExample2  extends Component{
+    static title = 'Define another ellipse with a radial gradient from white to blue';
+    render() {
+        return <Svg
+            height="150"
+            width="300"
+        >
+            <Defs>
+                <RadialGradient id="grad" cx="60" cy="45" rx="34" ry="33" fx="150" fy="75">
+                    <Stop
+                        offset="0%"
+                        stopColor="#fff"
+                        stopOpacity="1"
+                    />
+                    <Stop
+                        offset="100%"
+                        stopColor="#00f"
+                        stopOpacity="1"
+                    />
+                </RadialGradient>
+            </Defs>
+            <Ellipse cx="150" cy="75" rx="85" ry="55" fill="url(#grad)" />
+        </Svg>;
+    }
+}
+
+const icon = <Svg
+    height="20"
+    width="20"
+>
+    <Defs>
+        <LinearGradient id="grad" x1="0" y1="0" x2="0" y2="20">
+            <Stop offset="0%" stopColor="rgb(255,255,0)" stopOpacity="0" />
+            <Stop offset="100%" stopColor="red" stopOpacity="1" />
+        </LinearGradient>
+    </Defs>
+    <Circle cx="10" cy="10" r="10" fill="url(#grad)" />
+</Svg>;
+
+
+const samples = [LinearGradientHorizontal, LinearGradientVertical, RadialGradientExample, RadialGradientExample2];
+
+export {
+    icon,
+    samples
+};

Example/main.js

@@ -104,7 +104,7 @@ const styles = StyleSheet.create({
     }
 });
 
-const names = ['Svg', 'Stroking', 'Path', 'Line', 'Rect', 'Polygon', 'Polyline', 'Circle', 'Ellipse', 'G', 'Text', 'Use'];
+const names = ['Svg', 'Stroking', 'Path', 'Line', 'Rect', 'Polygon', 'Polyline', 'Circle', 'Ellipse', 'G', 'Text', 'Use', 'Gradients'];
 
 class ArtSvgExample extends Component {
     constructor() {

Example/package.json

@@ -6,8 +6,8 @@
     "start": "react-native start"
   },
   "dependencies": {
-    "react-native": "^0 .18.1",
-    "react-native-art-svg": "^1.0.1",
+    "react-native": "^0.18.1",
+    "react-native-art-svg": "^1.0.3",
     "react-native-root-modal": "^1.0.2"
   }
 }

README.md

@@ -9,15 +9,7 @@ TODO:
 5. animations https://github.com/maxwellito/vivus
 
 elements:
-1.defs
-2.tref !
-3.tspan !
-4.clipPath (wait for official todo)
-5.glyph ? missing-glyph?
-6.linearGradient
-7.radialGradient
-8.marker?
-9.pattern
-10.textPath
-11.stop
-12.symbol
+1.clipPath (wait for official complete)
+2.textPath (wait for official complete)
+3.symbol
+4.pattern

elements/Defs.js

@@ -8,6 +8,8 @@ import React, {
 let {Group} = ART;
 let map = {};
 
+import LinearGradient from './LinearGradient';
+import RadialGradient from './RadialGradient';
 let onlyChild = Children.only;
 
 class DefsItem extends Component{
@@ -81,6 +83,11 @@ class Defs extends Component{
 
     getChildren = () => {
         return Children.map(this.props.children, child => {
+            if (child.type === LinearGradient || child.type === RadialGradient) {
+                return cloneElement(child, {
+                    svgId: this.props.svgId
+                });
+            }
             if (child.props.id) {
                 return <DefsItem {...child.props} svgId={this.props.svgId}>{child}</DefsItem>;
             }

elements/Ellipse.js

@@ -3,8 +3,6 @@ import React, {
     PropTypes,
     ART
 } from 'react-native';
-import fillFilter from '../lib/fillFilter';
-import strokeFilter from '../lib/strokeFilter';
 import Path from './Path';
 
 let propType = PropTypes.oneOfType([PropTypes.string, PropTypes.number]);

elements/LinearGradient.js

@@ -0,0 +1,71 @@
+import React, {
+    Component,
+    PropTypes,
+    ART,
+    Children
+} from 'react-native';
+let {
+    Group,
+    LinearGradient: ARTLinearGradient
+} = ART;
+import {set, remove} from '../lib/fillFilter';
+import Stop from './Stop';
+import Color from 'color';
+let percentReg = /^(\-?\d+(?:\.\d+)?)(%?)$/;
+let propType = PropTypes.oneOfType([PropTypes.string, PropTypes.number]);
+class LinearGradient extends Component{
+    static displayName = 'LinearGradient';
+    static propTypes = {
+        x1: propType,
+        x2: propType,
+        y1: propType,
+        y2: propType,
+        id: PropTypes.string
+    };
+
+    constructor() {
+        super(...arguments);
+        this.id = this.props.id + ':' + this.props.svgId;
+    }
+
+    componentWillReceiveProps = nextProps => {
+        let id = nextProps.id + ':' + nextProps.svgId;
+        if (id !== this.id) {
+            remove(this.id);
+        }
+    };
+
+    componentWillUnmount = () => {
+        remove(this.id);
+    };
+
+    render() {
+        let {
+            x1,
+            y1,
+            x2,
+            y2
+        } = this.props;
+        let stops = {};
+        Children.forEach(this.props.children, child => {
+            if (child.type === Stop && child.props.stopColor && child.props.offset) {
+
+                // convert percent to float.
+                let matched = child.props.offset.match(percentReg);
+                let offset = matched[2] ? matched[1] / 100 : matched[1];
+
+                // add stop
+                stops[offset] = Color(child.props.stopColor).alpha(+child.props.stopOpacity).rgbaString();
+
+                // TODO:  convert percent to float.
+                set(this.id, new ARTLinearGradient(stops, x1, y1, x2, y2));
+            } else {
+                console.warn(`'LinearGradient' can only receive 'Stop' elements as children`);
+            }
+        });
+        return <Group />;
+    }
+}
+
+export default LinearGradient;
+

elements/Polygon.js

@@ -3,8 +3,6 @@ import React, {
     PropTypes,
     ART
 } from 'react-native';
-import fillFilter from '../lib/fillFilter';
-import strokeFilter from '../lib/strokeFilter';
 import Path from './Path';
 
 class Polygon extends Component{

elements/Polyline.js

@@ -5,10 +5,6 @@ import React, {
 } from 'react-native';
 import Path from './Path';
 
-
-import strokeFilter from '../lib/strokeFilter';
-import fillFilter from '../lib/fillFilter';
-import transformFilter from '../lib/transformFilter';
 class Polyline extends Component{
     static displayName = 'Polyline';
     static propTypes = {

elements/RadialGradient.js

@@ -0,0 +1,83 @@
+import React, {
+    Component,
+    PropTypes,
+    ART,
+    Children
+} from 'react-native';
+let {
+    Group,
+    RadialGradient: ARTRadialGradient
+} = ART;
+import {set, remove} from '../lib/fillFilter';
+import Stop from './Stop';
+import Color from 'color';
+let percentReg = /^(\-?\d+(?:\.\d+)?)(%?)$/;
+let propType = PropTypes.oneOfType([PropTypes.string, PropTypes.number]);
+class RadialGradient extends Component{
+    static displayName = 'RadialGradient';
+    static propTypes = {
+        fx: propType,
+        fy: propType,
+        rx: propType,
+        ry: propType,
+        cx: propType,
+        cy: propType,
+        r: propType,
+        id: PropTypes.string
+    };
+
+    constructor() {
+        super(...arguments);
+        this.id = this.props.id + ':' + this.props.svgId;
+    }
+
+    componentWillReceiveProps = nextProps => {
+        let id = nextProps.id + ':' + nextProps.svgId;
+        if (id !== this.id) {
+            remove(this.id);
+        }
+    };
+
+    componentWillUnmount = () => {
+        remove(this.id);
+    };
+
+    render() {
+        let {
+            fx,
+            fy,
+            rx,
+            ry,
+            cx,
+            cy,
+            r
+        } = this.props;
+
+        // TODO: render differently from svg in html
+        if (r) {
+            rx = ry = +r;
+        }
+        let stops = {};
+        Children.forEach(this.props.children, child => {
+            if (child.type === Stop && child.props.stopColor && child.props.offset) {
+
+                // convert percent to float.
+                let matched = child.props.offset.match(percentReg);
+                let offset = matched[2] ? matched[1] / 100 : matched[1];
+
+                // add stop
+                stops[offset] = Color(child.props.stopColor).alpha(+child.props.stopOpacity).rgbaString();
+
+                // TODO: convert percent to float.
+                set(this.id, new ARTRadialGradient(stops, fx, fy, rx, ry, cx, cy));
+
+            } else {
+                console.warn(`'RadialGradient' can only receive 'Stop' elements as children`);
+            }
+        });
+        return <Group />;
+    }
+}
+
+export default RadialGradient;
+

elements/Rect.js

@@ -4,9 +4,6 @@ import React, {
     ART
 } from 'react-native';
 
-import fillFilter from '../lib/fillFilter';
-import strokeFilter from '../lib/strokeFilter';
-import transformFilter from '../lib/transformFilter';
 import Path from './Path';
 
 let propType = PropTypes.oneOfType([PropTypes.string, PropTypes.number]);

elements/Stop.js

@@ -0,0 +1,21 @@
+import React, {
+    Component,
+    PropTypes,
+    ART
+} from 'react-native';
+let {
+    Group
+} = ART;
+class Stop extends Component{
+    static displayName = 'Stop';
+    static propTypes = {
+        stopColor: PropTypes.string,
+        stopOpacity: PropTypes.oneOfType([PropTypes.string, PropTypes.number])
+    };
+    render() {
+        return null;
+    }
+}
+
+export default Stop;
+

elements/Text.js

@@ -3,6 +3,7 @@ import React, {
     Component,
     PropTypes
 } from 'react-native';
+
 let {
     Text:ARTText
 } = ART;
@@ -38,6 +39,7 @@ class Text extends Component{
                 id={this.props.id}
                 svgId={this.props.svgId}
                 visible={true}
+                text={true}
             >
                 <Text {...this.props} id={null} />
             </Defs.Item>;

elements/Use.js

@@ -1,9 +1,9 @@
 import React, {
     Component,
     PropTypes,
-    ART
+    ART,
+    cloneElement
 } from 'react-native';
-
 import Defs from './Defs';
 class Use extends Component{
     static displayName = 'Use';

index.js

@@ -14,10 +14,13 @@ import G from './elements/G';
 import Text from './elements/Text';
 import Use from './elements/Use';
 import Defs from './elements/Defs';
+import LinearGradient from './elements/LinearGradient';
+import RadialGradient from './elements/RadialGradient';
+import Stop from './elements/Stop';
 
 let {
     Group
-    } = ART;
+} = ART;
 
 export {
     Svg,
@@ -32,7 +35,10 @@ export {
     Line,
     Rect,
     Use,
-    Defs
+    Defs,
+    LinearGradient,
+    RadialGradient,
+    Stop
 };
 
 export default Svg;

lib/fillFilter.js

@@ -1,4 +1,47 @@
 import rgba from './rgba';
+import {
+    ART
+} from 'react-native';
+
+let {
+    LinearGradient,
+    RadialGradient
+} = ART;
+
+let fillPatterns = {};
+let fillReg = /^url\(#(\w+?)\)$/;
 export default function (props) {
+    let {fill} = props;
+
+    if (fill) {
+        if (fill instanceof LinearGradient || fill instanceof RadialGradient) {
+            return fill;
+        }
+
+        // 尝试匹配 fill="url(#pattern)"
+        let matched = fill.match(fillReg);
+        if (matched) {
+            let patternName = `${matched[1]}:${props.svgId}`;
+            if (fillPatterns[patternName]) {
+                return fillPatterns[patternName];
+            } else {
+                return null;
+            }
+        }
+    }
+
     return rgba(props.fill === undefined ? '#000' : props.fill, props.fillOpacity);
 }
+
+function set(id, pattern) {
+    fillPatterns[id] = pattern;
+}
+
+function remove(id) {
+    delete fillPatterns[id];
+}
+
+export {
+    set,
+    remove
+}

lib/transformFilter.js

@@ -1,14 +1,14 @@
 export default function (props) {
-    let coords = props.origin ? props.origin.split(',') : [];
+    let coords = props.origin ? props.origin.split(/\s*,\s*/) : [];
 
     let originX = coords.length === 2 ? coords[0] : props.originX;
-    let originY = coords.length === 2 ? coords[1] :props.originY;
-
+    let originY = coords.length === 2 ? coords[1] : props.originY;
+    let scale = props.scale == 0 ? 0 : props.scale;
     return {
-        rotation: props.rotation || props.rotate || 0,
-        scale: props.scale || 1,
-        originX,
-        originY,
+        rotation: +props.rotation / 2 || +props.rotate / 2 || 0,
+        scale: isNaN(scale) ? 1 : scale,
+        originX: +originX || 0,
+        originY: +originY || 0,
         x: +props.x || 0,
         y: +props.y || 0
     }