477 lines
10 KiB
JavaScript
477 lines
10 KiB
JavaScript
var fixShadow = require("./helper/fixShadow");
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var _constant = require("./constant");
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var ContextCachedBy = _constant.ContextCachedBy;
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var STYLE_COMMON_PROPS = [['shadowBlur', 0], ['shadowOffsetX', 0], ['shadowOffsetY', 0], ['shadowColor', '#000'], ['lineCap', 'butt'], ['lineJoin', 'miter'], ['miterLimit', 10]]; // var SHADOW_PROPS = STYLE_COMMON_PROPS.slice(0, 4);
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// var LINE_PROPS = STYLE_COMMON_PROPS.slice(4);
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var Style = function (opts) {
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this.extendFrom(opts, false);
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};
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function createLinearGradient(ctx, obj, rect) {
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var x = obj.x == null ? 0 : obj.x;
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var x2 = obj.x2 == null ? 1 : obj.x2;
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var y = obj.y == null ? 0 : obj.y;
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var y2 = obj.y2 == null ? 0 : obj.y2;
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if (!obj.global) {
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x = x * rect.width + rect.x;
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x2 = x2 * rect.width + rect.x;
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y = y * rect.height + rect.y;
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y2 = y2 * rect.height + rect.y;
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} // Fix NaN when rect is Infinity
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x = isNaN(x) ? 0 : x;
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x2 = isNaN(x2) ? 1 : x2;
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y = isNaN(y) ? 0 : y;
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y2 = isNaN(y2) ? 0 : y2;
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var canvasGradient = ctx.createLinearGradient(x, y, x2, y2);
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return canvasGradient;
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}
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function createRadialGradient(ctx, obj, rect) {
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var width = rect.width;
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var height = rect.height;
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var min = Math.min(width, height);
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var x = obj.x == null ? 0.5 : obj.x;
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var y = obj.y == null ? 0.5 : obj.y;
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var r = obj.r == null ? 0.5 : obj.r;
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if (!obj.global) {
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x = x * width + rect.x;
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y = y * height + rect.y;
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r = r * min;
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}
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var canvasGradient = ctx.createRadialGradient(x, y, 0, x, y, r);
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return canvasGradient;
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}
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Style.prototype = {
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constructor: Style,
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/**
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* @type {string}
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*/
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fill: '#000',
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/**
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* @type {string}
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*/
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stroke: null,
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/**
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* @type {number}
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*/
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opacity: 1,
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/**
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* @type {number}
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*/
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fillOpacity: null,
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/**
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* @type {number}
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*/
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strokeOpacity: null,
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/**
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* `true` is not supported.
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* `false`/`null`/`undefined` are the same.
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* `false` is used to remove lineDash in some
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* case that `null`/`undefined` can not be set.
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* (e.g., emphasis.lineStyle in echarts)
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* @type {Array.<number>|boolean}
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*/
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lineDash: null,
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/**
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* @type {number}
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*/
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lineDashOffset: 0,
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/**
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* @type {number}
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*/
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shadowBlur: 0,
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/**
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* @type {number}
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*/
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shadowOffsetX: 0,
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/**
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* @type {number}
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*/
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shadowOffsetY: 0,
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/**
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* @type {number}
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*/
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lineWidth: 1,
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/**
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* If stroke ignore scale
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* @type {Boolean}
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*/
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strokeNoScale: false,
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// Bounding rect text configuration
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// Not affected by element transform
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/**
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* @type {string}
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*/
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text: null,
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/**
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* If `fontSize` or `fontFamily` exists, `font` will be reset by
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* `fontSize`, `fontStyle`, `fontWeight`, `fontFamily`.
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* So do not visit it directly in upper application (like echarts),
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* but use `contain/text#makeFont` instead.
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* @type {string}
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*/
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font: null,
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/**
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* The same as font. Use font please.
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* @deprecated
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* @type {string}
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*/
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textFont: null,
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/**
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* It helps merging respectively, rather than parsing an entire font string.
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* @type {string}
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*/
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fontStyle: null,
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/**
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* It helps merging respectively, rather than parsing an entire font string.
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* @type {string}
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*/
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fontWeight: null,
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/**
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* It helps merging respectively, rather than parsing an entire font string.
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* Should be 12 but not '12px'.
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* @type {number}
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*/
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fontSize: null,
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/**
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* It helps merging respectively, rather than parsing an entire font string.
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* @type {string}
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*/
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fontFamily: null,
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/**
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* Reserved for special functinality, like 'hr'.
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* @type {string}
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*/
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textTag: null,
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/**
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* @type {string}
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*/
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textFill: '#000',
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/**
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* @type {string}
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*/
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textStroke: null,
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/**
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* @type {number}
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*/
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textWidth: null,
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/**
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* Only for textBackground.
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* @type {number}
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*/
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textHeight: null,
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/**
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* textStroke may be set as some color as a default
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* value in upper applicaion, where the default value
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* of textStrokeWidth should be 0 to make sure that
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* user can choose to do not use text stroke.
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* @type {number}
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*/
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textStrokeWidth: 0,
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/**
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* @type {number}
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*/
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textLineHeight: null,
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/**
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* 'inside', 'left', 'right', 'top', 'bottom'
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* [x, y]
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* Based on x, y of rect.
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* @type {string|Array.<number>}
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* @default 'inside'
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*/
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textPosition: 'inside',
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/**
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* If not specified, use the boundingRect of a `displayable`.
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* @type {Object}
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*/
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textRect: null,
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/**
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* [x, y]
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* @type {Array.<number>}
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*/
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textOffset: null,
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/**
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* @type {string}
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*/
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textAlign: null,
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/**
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* @type {string}
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*/
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textVerticalAlign: null,
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/**
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* @type {number}
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*/
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textDistance: 5,
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/**
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* @type {string}
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*/
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textShadowColor: 'transparent',
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/**
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* @type {number}
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*/
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textShadowBlur: 0,
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/**
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* @type {number}
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*/
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textShadowOffsetX: 0,
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/**
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* @type {number}
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*/
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textShadowOffsetY: 0,
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/**
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* @type {string}
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*/
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textBoxShadowColor: 'transparent',
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/**
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* @type {number}
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*/
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textBoxShadowBlur: 0,
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/**
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* @type {number}
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*/
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textBoxShadowOffsetX: 0,
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/**
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* @type {number}
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*/
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textBoxShadowOffsetY: 0,
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/**
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* Whether transform text.
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* Only available in Path and Image element,
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* where the text is called as `RectText`.
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* @type {boolean}
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*/
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transformText: false,
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/**
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* Text rotate around position of Path or Image.
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* The origin of the rotation can be specified by `textOrigin`.
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* Only available in Path and Image element,
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* where the text is called as `RectText`.
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*/
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textRotation: 0,
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/**
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* Text origin of text rotation.
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* Useful in the case like label rotation of circular symbol.
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* Only available in Path and Image element, where the text is called
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* as `RectText` and the element is called as "host element".
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* The value can be:
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* + If specified as a coordinate like `[10, 40]`, it is the `[x, y]`
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* base on the left-top corner of the rect of its host element.
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* + If specified as a string `center`, it is the center of the rect of
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* its host element.
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* + By default, this origin is the `textPosition`.
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* @type {string|Array.<number>}
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*/
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textOrigin: null,
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/**
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* @type {string}
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*/
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textBackgroundColor: null,
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/**
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* @type {string}
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*/
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textBorderColor: null,
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/**
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* @type {number}
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*/
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textBorderWidth: 0,
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/**
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* @type {number}
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*/
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textBorderRadius: 0,
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/**
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* Can be `2` or `[2, 4]` or `[2, 3, 4, 5]`
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* @type {number|Array.<number>}
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*/
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textPadding: null,
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/**
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* Text styles for rich text.
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* @type {Object}
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*/
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rich: null,
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/**
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* {outerWidth, outerHeight, ellipsis, placeholder}
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* @type {Object}
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*/
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truncate: null,
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/**
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* https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/globalCompositeOperation
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* @type {string}
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*/
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blend: null,
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/**
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* @param {CanvasRenderingContext2D} ctx
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*/
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bind: function (ctx, el, prevEl) {
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var style = this;
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var prevStyle = prevEl && prevEl.style; // If no prevStyle, it means first draw.
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// Only apply cache if the last time cachced by this function.
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var notCheckCache = !prevStyle || ctx.__attrCachedBy !== ContextCachedBy.STYLE_BIND;
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ctx.__attrCachedBy = ContextCachedBy.STYLE_BIND;
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for (var i = 0; i < STYLE_COMMON_PROPS.length; i++) {
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var prop = STYLE_COMMON_PROPS[i];
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var styleName = prop[0];
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if (notCheckCache || style[styleName] !== prevStyle[styleName]) {
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// FIXME Invalid property value will cause style leak from previous element.
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ctx[styleName] = fixShadow(ctx, styleName, style[styleName] || prop[1]);
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}
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}
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if (notCheckCache || style.fill !== prevStyle.fill) {
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ctx.fillStyle = style.fill;
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}
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if (notCheckCache || style.stroke !== prevStyle.stroke) {
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ctx.strokeStyle = style.stroke;
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}
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if (notCheckCache || style.opacity !== prevStyle.opacity) {
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ctx.globalAlpha = style.opacity == null ? 1 : style.opacity;
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}
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if (notCheckCache || style.blend !== prevStyle.blend) {
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ctx.globalCompositeOperation = style.blend || 'source-over';
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}
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if (this.hasStroke()) {
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var lineWidth = style.lineWidth;
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ctx.lineWidth = lineWidth / (this.strokeNoScale && el && el.getLineScale ? el.getLineScale() : 1);
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}
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},
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hasFill: function () {
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var fill = this.fill;
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return fill != null && fill !== 'none';
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},
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hasStroke: function () {
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var stroke = this.stroke;
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return stroke != null && stroke !== 'none' && this.lineWidth > 0;
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},
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/**
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* Extend from other style
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* @param {zrender/graphic/Style} otherStyle
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* @param {boolean} overwrite true: overwrirte any way.
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* false: overwrite only when !target.hasOwnProperty
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* others: overwrite when property is not null/undefined.
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*/
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extendFrom: function (otherStyle, overwrite) {
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if (otherStyle) {
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for (var name in otherStyle) {
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if (otherStyle.hasOwnProperty(name) && (overwrite === true || (overwrite === false ? !this.hasOwnProperty(name) : otherStyle[name] != null))) {
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this[name] = otherStyle[name];
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}
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}
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}
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},
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/**
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* Batch setting style with a given object
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* @param {Object|string} obj
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* @param {*} [obj]
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*/
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set: function (obj, value) {
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if (typeof obj === 'string') {
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this[obj] = value;
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} else {
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this.extendFrom(obj, true);
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}
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},
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/**
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* Clone
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* @return {zrender/graphic/Style} [description]
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*/
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clone: function () {
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var newStyle = new this.constructor();
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newStyle.extendFrom(this, true);
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return newStyle;
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},
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getGradient: function (ctx, obj, rect) {
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var method = obj.type === 'radial' ? createRadialGradient : createLinearGradient;
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var canvasGradient = method(ctx, obj, rect);
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var colorStops = obj.colorStops;
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for (var i = 0; i < colorStops.length; i++) {
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canvasGradient.addColorStop(colorStops[i].offset, colorStops[i].color);
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}
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return canvasGradient;
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}
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};
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var styleProto = Style.prototype;
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for (var i = 0; i < STYLE_COMMON_PROPS.length; i++) {
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var prop = STYLE_COMMON_PROPS[i];
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if (!(prop[0] in styleProto)) {
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styleProto[prop[0]] = prop[1];
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}
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} // Provide for others
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Style.getGradient = styleProto.getGradient;
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var _default = Style;
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module.exports = _default; |