Draw Me a Kanji
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.gf.qytechs.cn/scripts/11842/68906/dmak.js
/*
* Draw Me A Kanji - v0.3.1
* A funny drawer for your Japanese writings
* http://drawmeakanji.com
*
* Made by Matthieu Bilbille
* Under MIT License
*/
;(function () {
"use strict";
// Create a safe reference to the DrawMeAKanji object for use below.
var Dmak = function (text, options) {
this.text = text;
this.options = extend(Dmak.options, options);
this.strokes = [];
this.papers = [];
this.pointer = 0;
this.timeouts = {
play : [],
erasing : [],
drawing : []
};
if (!this.options.skipLoad) {
var loader = new DmakLoader(this.options.uri),
self = this;
loader.load(text, function (data) {
self.prepare(data);
// Execute custom callback "loaded" here
self.options.loaded(self.kanjis);
if (self.options.autoplay) {
self.render();
}
});
}
};
// Current version.
Dmak.VERSION = "0.2.0";
Dmak.options = {
uri: "",
skipLoad: false,
autoplay: true,
height: 109,
width: 109,
viewBox: {
x: 0,
y: 0,
w: 109,
h: 109
},
step: 0.03,
element: "draw",
stroke: {
animated : {
drawing : true,
erasing : true
},
order: {
visible: false,
attr: {
"font-size": "8",
"fill": "#999999"
}
},
attr: {
"active": "#BF0000",
// may use the keyword "random" here for random color
"stroke": "#2C2C2C",
"stroke-width": 4,
"stroke-linecap": "round",
"stroke-linejoin": "round"
}
},
grid: {
show: true,
attr: {
"stroke": "#CCCCCC",
"stroke-width": 0.5,
"stroke-dasharray": "--"
}
},
loaded: function () {
},
erased: function () {
},
drew: function () {
}
};
Dmak.fn = Dmak.prototype = {
/**
* Prepare kanjis and papers for rendering.
*/
prepare: function (data) {
this.kanjis = preprocessStrokes(data);
this.papers = giveBirthToRaphael(data.length);
if (this.options.grid.show) {
showGrid(this.papers);
}
},
/**
* Clean all strokes on papers.
*/
erase: function (end) {
// Cannot have two rendering process for the same draw. Keep it cool.
if (this.timeouts.play.length) {
return false;
}
// Don't go behind the beginning.
if (this.pointer <= 0) {
return false;
}
if (typeof end === "undefined") {
end = 0;
}
do {
this.pointer--;
eraseStroke(this.kanjis[this.pointer], this.timeouts.erasing);
// Execute custom callback "erased" here
this.options.erased(this.pointer);
}
while (this.pointer > end);
},
/**
* All the magic happens here.
*/
render: function (end) {
// Cannot have two rendering process for
// the same draw. Keep it cool.
if (this.timeouts.play.length) {
return false;
}
if (typeof end === "undefined") {
end = this.kanjis.length;
} else if (end > this.kanjis.length) {
return false;
}
var cb = function (that) {
drawStroke(that.papers[that.kanjis[that.pointer].char], that.kanjis[that.pointer], that.timeouts.drawing);
// Execute custom callback "drew" here
that.options.drew(that.pointer);
that.pointer++;
that.timeouts.play.shift();
},
delay = 0,
i;
// Before drawing clear any remaining erasing timeouts
for (i = 0; i < this.timeouts.erasing.length; i++) {
window.clearTimeout(this.timeouts.erasing[i]);
this.timeouts.erasing = [];
}
for (i = this.pointer; i < end; i++) {
if (!Dmak.options.stroke.animated.drawing || delay <= 0) {
cb(this);
} else {
this.timeouts.play.push(setTimeout(cb, delay, this));
}
delay += this.kanjis[i].duration;
}
},
/**
* Pause rendering
*/
pause: function () {
for (var i = 0; i < this.timeouts.play.length; i++) {
window.clearTimeout(this.timeouts.play[i]);
}
this.timeouts.play = [];
},
/**
* Wrap the erase function to remove the x last strokes.
*/
eraseLastStrokes: function (nbStrokes) {
this.erase(this.pointer - nbStrokes);
},
/**
* Wrap the render function to render the x next strokes.
*/
renderNextStrokes: function (nbStrokes) {
this.render(this.pointer + nbStrokes);
}
};
// HELPERS
/**
* Flattens the array of strokes ; 3D > 2D and does some preprocessing while
* looping through all the strokes:
* - Maps to a character index
* - Calculates path length
*/
function preprocessStrokes(data) {
var strokes = [],
stroke,
length,
i,
j;
for (i = 0; i < data.length; i++) {
for (j = 0; j < data[i].length; j++) {
length = Raphael.getTotalLength(data[i][j].path);
stroke = {
"char": i,
"length": length,
"duration": length * Dmak.options.step * 1000,
"path": data[i][j].path,
"groups" : data[i][j].groups,
"text": data[i][j].text,
"object": {
"path" : null,
"text": null
}
};
strokes.push(stroke);
}
}
return strokes;
}
/**
* Init Raphael paper objects
*/
function giveBirthToRaphael(nbChar) {
var papers = [],
paper,
i;
for (i = 0; i < nbChar; i++) {
paper = new Raphael(Dmak.options.element, Dmak.options.width + "px", Dmak.options.height + "px");
paper.setViewBox(Dmak.options.viewBox.x, Dmak.options.viewBox.y, Dmak.options.viewBox.w, Dmak.options.viewBox.h);
paper.canvas.setAttribute("class", "dmak-svg");
papers.push(paper);
}
return papers.reverse();
}
/**
* Draw the background grid
*/
function showGrid(papers) {
var i;
for (i = 0; i < papers.length; i++) {
papers[i].path("M" + (Dmak.options.viewBox.w / 2) + ",0 L" + (Dmak.options.viewBox.w / 2) + "," + Dmak.options.viewBox.h).attr(Dmak.options.grid.attr);
papers[i].path("M0," + (Dmak.options.viewBox.h / 2) + " L" + Dmak.options.viewBox.w + "," + (Dmak.options.viewBox.h / 2)).attr(Dmak.options.grid.attr);
}
}
/**
* Remove a single stroke ; deletion can be animated if set as so.
*/
function eraseStroke(stroke, timeouts) {
// In some cases the text object may be null:
// - Stroke order display disabled
// - Stroke already deleted
if (stroke.object.text !== null) {
stroke.object.text.remove();
}
var cb = function() {
stroke.object.path.remove();
// Finally properly prepare the object variable
stroke.object = {
"path" : null,
"text" : null
};
timeouts.shift();
};
if (Dmak.options.stroke.animated.erasing) {
stroke.object.path.node.style.stroke = Dmak.options.stroke.attr.active;
timeouts.push(animateStroke(stroke, -1, cb));
}
else {
cb();
}
}
/**
* Draw a single stroke ; drawing can be animated if set as so.
*/
function drawStroke(paper, stroke, timeouts) {
var cb = function() {
// The stroke object may have been already erased when we reach this timeout
if (stroke.object.path === null) {
return;
}
var color = Dmak.options.stroke.attr.stroke;
if(Dmak.options.stroke.attr.stroke === "random") {
color = Raphael.getColor();
}
// Revert back to the default color.
stroke.object.path.node.style.stroke = color;
stroke.object.path.node.style.transition = stroke.object.path.node.style.WebkitTransition = "stroke 400ms ease";
timeouts.shift();
};
stroke.object.path = paper.path(stroke.path);
stroke.object.path.attr(Dmak.options.stroke.attr);
if (Dmak.options.stroke.order.visible) {
showStrokeOrder(paper, stroke);
}
if (Dmak.options.stroke.animated.drawing) {
animateStroke(stroke, 1, cb);
}
else {
cb();
}
}
/**
* Draw a single next to
*/
function showStrokeOrder(paper, stroke) {
stroke.object.text = paper.text(stroke.text.x, stroke.text.y, stroke.text.value);
stroke.object.text.attr(Dmak.options.stroke.order.attr);
}
/**
* Animate stroke drawing.
* Based on the great article wrote by Jake Archibald
* http://jakearchibald.com/2013/animated-line-drawing-svg/
*/
function animateStroke(stroke, direction, callback) {
stroke.object.path.attr({"stroke": Dmak.options.stroke.attr.active});
stroke.object.path.node.style.transition = stroke.object.path.node.style.WebkitTransition = "none";
// Set up the starting positions
stroke.object.path.node.style.strokeDasharray = stroke.length + " " + stroke.length;
stroke.object.path.node.style.strokeDashoffset = (direction > 0) ? stroke.length : 0;
// Trigger a layout so styles are calculated & the browser
// picks up the starting position before animating
stroke.object.path.node.getBoundingClientRect();
stroke.object.path.node.style.transition = stroke.object.path.node.style.WebkitTransition = "stroke-dashoffset " + stroke.duration + "ms ease";
// Go!
stroke.object.path.node.style.strokeDashoffset = (direction > 0) ? "0" : stroke.length;
// Execute the callback once the animation is done
// and return the timeout id.
return setTimeout(callback, stroke.duration);
}
/**
* Simplistic helper function for extending objects
*/
function extend(defaults, replacement) {
var result = defaults,
key;
if (arguments.length !== 2) {
throw new Error("Missing arguments in extend function");
}
for (key in replacement) {
if (typeof result[key] === "object") {
result[key] = extend(result[key], replacement[key]);
} else if (result.hasOwnProperty(key)) {
result[key] = replacement[key];
}
}
return result;
}
window.Dmak = Dmak;
}());
;(function () {
"use strict";
// Create a safe reference to the DrawMeAKanji object for use below.
var DmakLoader = function (uri) {
this.uri = uri;
};
/**
* Gather SVG data information for a given set of characters.
* By default this action is done while instanciating the Word
* object, but it can be skipped, see above
*/
DmakLoader.prototype.load = function (text, callback) {
var paths = [],
nbChar = text.length,
done = 0,
i,
callbacks = {
done: function (index, data) {
paths[index] = data;
done++;
if (done === nbChar) {
callback(paths);
}
},
error: function (msg) {
console.log("Error", msg);
}
};
for (i = 0; i < nbChar; i++) {
loadSvg(this.uri, i, text.charCodeAt(i).toString(16), callbacks);
}
};
/**
* Try to load a SVG file matching the given char code.
* @thanks to the incredible work made by KanjiVG
* @see: http://kanjivg.tagaini.net
*/
function loadSvg(uri, index, charCode, callbacks) {
var xhr = new XMLHttpRequest(),
code = ("00000" + charCode).slice(-5);
// Skip space character
if(code === "00020" || code === "03000") {
callbacks.done(index, {
paths: [],
texts: []
});
return;
}
xhr.open("GET", uri + code + ".svg", true);
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
callbacks.done(index, parseResponse(xhr.response, code));
} else {
callbacks.error(xhr.statusText);
}
}
};
xhr.send();
}
/**
* Simple parser to extract paths and texts data.
*/
function parseResponse(response, code) {
var data = [],
dom = new DOMParser().parseFromString(response, "application/xml"),
texts = dom.querySelectorAll("text"),
groups = [],
i;
// Private recursive function to parse DOM content
function __parse(element) {
var children = element.childNodes,
i;
for(i = 0; i < children.length; i++) {
if(children[i].tagName === "g") {
groups.push(children[i].getAttribute("id"));
__parse(children[i]);
groups.splice(groups.indexOf(children[i].getAttribute("id")), 1);
}
else if(children[i].tagName === "path") {
data.push({
"path" : children[i].getAttribute("d"),
"groups" : groups.slice(0)
});
}
}
}
// Start parsing
__parse(dom.getElementById("kvg:" + code));
// And finally add order mark information
for (i = 0; i < texts.length; i++) {
data[i].text = {
"value" : texts[i].textContent,
"x" : texts[i].getAttribute("transform").split(" ")[4],
"y" : texts[i].getAttribute("transform").split(" ")[5].replace(")", "")
};
}
return data;
}
window.DmakLoader = DmakLoader;
}());
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