Shows a kanji's stroke order on its page and during lessons and reviews.
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// ==UserScript==
// @name WaniKani Stroke Order
// @namespace japanese
// @version 1.1.8
// @description Shows a kanji's stroke order on its page and during lessons and reviews.
// @license GPL version 3 or any later version; http://www.gnu.org/copyleft/gpl.html
// @include http*://*wanikani.com/kanji/*
// @include http*://*wanikani.com/level/*/kanji/*
// @include http*://*wanikani.com/review/session
// @include http*://*wanikani.com/lesson/session
// @author Looki, maintained by Kumirei
// @grant GM_xmlhttpRequest
// @connect jisho.org
// @connect cloudfront.net
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js
// @require https://cdnjs.cloudflare.com/ajax/libs/snap.svg/0.5.1/snap.svg-min.js
// ==/UserScript==
/*
* Thanks a lot to ...
* Wanikani Phonetic-Semantic Composition - Userscript
* by ruipgpinheiro (LordGravewish)
* ... for code showing me how to insert sections during kanji reviews.
* The code heavily borrows from that script!
* Also thanks to Halo for a loading bug fix!
*/
;(function () {
/*
* Helper Functions/Variables
*/
$ = unsafeWindow.$
/*
* Global Variables/Objects/Classes
*/
var PageEnum = Object.freeze({ unknown: 0, kanji: 1, reviews: 2, lessons: 3 })
var curPage = PageEnum.unknown
var JISHO = 'https://jisho.org'
var strokeOrderCss =
"<style type='text/css'>" +
'.stroke_order_diagram--bounding_box {fill: none;stroke: #ddd; stroke-width: 2; stroke-linecap: square;stroke-linejoin: square;}' +
'.stroke_order_diagram--bounding_box {fill: none;stroke: #ddd; stroke-width: 2;stroke-linecap: square;stroke-linejoin: square;}' +
'.stroke_order_diagram--existing_path {fill: none;stroke: #aaa;stroke-width: 3;stroke-linecap: round;stroke-linejoin: round;}' +
'.stroke_order_diagram--current_path {fill: none;stroke: #000;stroke-width: 3; stroke-linecap: round; stroke-linejoin: round;}' +
'.stroke_order_diagram--path_start {fill: rgba(255,0,0,0.7);stroke: none;}' +
'.stroke_order_diagram--guide_line {fill: none; stroke: #ddd;stroke-width: 2;stroke-linecap: square; stroke-linejoin: square; stroke-dasharray: 5, 5;}</style>'
/*
* Main
*/
function init() {
// Determine page type
if (/\/kanji\/./.test(document.URL)) {
curPage = PageEnum.kanji
} else if (/\/review/.test(document.URL)) {
curPage = PageEnum.reviews
} else if (/\/lesson/.test(document.URL)) {
curPage = PageEnum.lessons
}
// Create and store the element that will hold the image
unsafeWindow.diagram = createDiagramSection()
// Register callback for when to load stroke order
switch (curPage) {
case PageEnum.kanji:
loadDiagram()
break
case PageEnum.reviews:
var o = new MutationObserver(function (mutations) {
// The last one always has 2 mutations, so let's use that
if (mutations.length != 2) return
// Reviews dynamically generate the DOM. We always need to re-insert the element
if (getKanji() !== null) {
setTimeout(function () {
var diagram = createDiagramSection()
if (diagram !== null && diagram.length > 0) {
unsafeWindow.diagram = diagram
loadDiagram()
}
}, 150)
}
})
o.observe(document.getElementById('item-info'), { attributes: true })
break
case PageEnum.lessons:
o = new MutationObserver(loadDiagram)
o.observe(document.getElementById('supplement-kan'), { attributes: true })
loadDiagram()
break
}
}
if (document.readyState === 'complete') {
init()
} else {
window.addEventListener('load', init)
}
/*
* Returns the current kanji
*/
function getKanji() {
switch (curPage) {
case PageEnum.kanji:
return document.title[document.title.length - 1]
case PageEnum.reviews:
var curItem = $.jStorage.get('currentItem')
if ('kan' in curItem) return curItem.kan.trim()
else return null
break
case PageEnum.lessons:
var kanjiNode = $('#character')
if (kanjiNode === undefined || kanjiNode === null) return null
return kanjiNode.text().trim()
}
return null
}
/*
* Creates a section for the diagram and returns a pointer to its content
*/
function createDiagramSection() {
// Reviews hack: Only do it once
if ($('#stroke_order').length == 0) {
let sectionHTML =
'<section><h2>Stroke Order</h2><div style="width:100%;overflow-x: auto; overflow-y: hidden"><svg id="stroke_order"></svg></div></section>'
switch (curPage) {
case PageEnum.kanji:
$(sectionHTML).insertAfter('.span12 header')
break
case PageEnum.reviews:
console.log('prepend')
$('#item-info-col2').prepend(sectionHTML)
break
case PageEnum.lessons:
$('#supplement-kan-breakdown .col1').append(sectionHTML)
break
}
$(strokeOrderCss).appendTo('head')
}
return $('#stroke_order').empty()
}
/*
* Adds the diagram section element to the appropriate location
*/
function loadDiagram() {
if (!unsafeWindow || !unsafeWindow.diagram.length) return
diagram.empty()
setTimeout(function () {
GM_xmlhttpRequest({
method: 'GET',
url: new URL(JISHO + '/search/' + getKanji() + '%20%23kanji'),
onload: function (xhr) {
var diagram = unsafeWindow.diagram
if (xhr.status == 200) {
var strokeOrderSvg = xhr.responseText.match(/var url = '\/\/(.+)';/)
if (strokeOrderSvg) {
GM_xmlhttpRequest({
method: 'GET',
url: new URL('https://' + strokeOrderSvg[1]),
onload: function (xhr) {
diagram.empty()
new strokeOrderDiagram(diagram.get(0), $.parseXML(xhr.responseText, 'xml'))
},
onerror: function (xhr) {
unsafeWindow.diagram.html('Error while loading diagram')
},
})
}
} else {
console.error(xhr.responseText)
unsafeWindow.diagram.html('Error while loading diagram ')
}
},
onerror: function (xhr) {
console.error(xhr.responseText)
unsafeWindow.diagram.html('Error while loading diagram')
},
})
}, 0)
}
/*
* Lifted from jisho.org
*/
var strokeOrderDiagram = function (element, svgDocument) {
var s = Snap(element)
var diagramSize = 200
var coordRe = '(?:\\d+(?:\\.\\d+)?)'
var strokeRe = new RegExp('^[LMT]\\s*(' + coordRe + ')[,\\s](' + coordRe + ')', 'i')
var f = Snap(svgDocument.getElementsByTagName('svg')[0])
var allPaths = f.selectAll('path')
var drawnPaths = []
var canvasWidth = (allPaths.length * diagramSize) / 2
var canvasHeight = diagramSize / 2
var frameSize = diagramSize / 2
var frameOffsetMatrix = new Snap.Matrix()
frameOffsetMatrix.translate(-frameSize / 16 + 2, -frameSize / 16 + 2)
// Set drawing area
s.node.style.width = canvasWidth + 'px'
s.node.style.height = canvasHeight + 'px'
s.node.setAttribute('viewBox', '0 0 ' + canvasWidth + ' ' + canvasHeight)
// Draw global guides
var boundingBoxTop = s.line(1, 1, canvasWidth - 1, 1)
var boundingBoxLeft = s.line(1, 1, 1, canvasHeight - 1)
var boundingBoxBottom = s.line(1, canvasHeight - 1, canvasWidth - 1, canvasHeight - 1)
var horizontalGuide = s.line(0, canvasHeight / 2, canvasWidth, canvasHeight / 2)
boundingBoxTop.attr({ class: 'stroke_order_diagram--bounding_box' })
boundingBoxLeft.attr({ class: 'stroke_order_diagram--bounding_box' })
boundingBoxBottom.attr({ class: 'stroke_order_diagram--bounding_box' })
horizontalGuide.attr({ class: 'stroke_order_diagram--guide_line' })
// Draw strokes
var pathNumber = 1
allPaths.forEach(function (currentPath) {
var moveFrameMatrix = new Snap.Matrix()
moveFrameMatrix.translate(frameSize * (pathNumber - 1) - 4, -4)
// Draw frame guides
var verticalGuide = s.line(
frameSize * pathNumber - frameSize / 2,
1,
frameSize * pathNumber - frameSize / 2,
canvasHeight - 1,
)
var frameBoxRight = s.line(frameSize * pathNumber - 1, 1, frameSize * pathNumber - 1, canvasHeight - 1)
verticalGuide.attr({ class: 'stroke_order_diagram--guide_line' })
frameBoxRight.attr({ class: 'stroke_order_diagram--bounding_box' })
// Draw previous strokes
drawnPaths.forEach(function (existingPath) {
var localPath = existingPath.clone()
localPath.transform(moveFrameMatrix)
localPath.attr({ class: 'stroke_order_diagram--existing_path' })
s.append(localPath)
})
// Draw current stroke
currentPath.transform(frameOffsetMatrix)
currentPath.transform(moveFrameMatrix)
currentPath.attr({ class: 'stroke_order_diagram--current_path' })
s.append(currentPath)
// Draw stroke start point
var match = strokeRe.exec(currentPath.node.getAttribute('d'))
var pathStartX = match[1]
var pathStartY = match[2]
var strokeStart = s.circle(pathStartX, pathStartY, 4)
strokeStart.attr({ class: 'stroke_order_diagram--path_start' })
strokeStart.transform(moveFrameMatrix)
pathNumber++
drawnPaths.push(currentPath.clone())
})
}
})()