517 lines
17 KiB
JavaScript
517 lines
17 KiB
JavaScript
let txtjs = {}
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Ox.load({UI: {loadCSS: false}}, function() {
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Ox.$parent.bindMessage(function(data, event) {
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txtjs.onMessage(data, event)
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})
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})
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txtjs.open = function(url) {
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fetch(url).then(function(response) {
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return response.text()
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}).then(txtjs.renderText)
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}
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txtjs.mark = function(notes) {
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notes.forEach(function(note) {
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if (!txtjs.notes.includes(note)) {
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txtjs.notes.push(note)
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}
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txtjs.renderNote(note)
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})
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}
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txtjs.notes = []
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txtjs.addNoteFromSelection = function() {
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let note = txtjs.getNoteFromSelection()
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if (!note || txtjs.noteExists(note)) {
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return
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}
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txtjs.renderNote(note)
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txtjs.notes.push(note)
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txtjs.selectNote(note.id)
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getSelection().removeAllRanges()
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txtjs.postMessage('addNote', note)
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}
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txtjs.beginEdit = function() {
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let selected = txtjs.getSelectedNote()
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if (!selected || !selected.elements[0].classList.contains('editable')) {
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return
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}
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selected.elements.forEach(function(element) {
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element.classList.add('editing')
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})
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}
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txtjs.cancelEdit = function() {
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let editing = Array.from(document.querySelectorAll('g.editing'))
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editing.forEach(function(element) {
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element.classList.remove('editing')
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})
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}
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txtjs.createSVGElement = function(name) {
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return document.createElementNS('http://www.w3.org/2000/svg', name)
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}
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txtjs.editNote = function() {
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let editing = Array.from(document.querySelectorAll('g.editing'))
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let note = txtjs.getNoteFromSelection()
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if (editing.length == 0 || !note) {
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return
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}
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let id = txtjs.getNoteId(editing[0])
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note = Object.assign(Ox.getObjectById(txtjs.notes, id), {
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position: note.position,
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text: note.text
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})
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editing.forEach(function(element) {
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element.parentElement.removeChild(element)
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})
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txtjs.renderNote(note)
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getSelection().removeAllRanges()
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txtjs.postMessage('editNote', {
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id: id,
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position: note.position,
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text: note.text
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})
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txtjs.selectNote(note.id)
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}
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txtjs.getNewId = function() {
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let ids = txtjs.notes.map(function(note) {
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return note.id
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})
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let i = 1
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while (ids.includes(Ox.encodeBase26(i))) {
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i++
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}
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return Ox.encodeBase26(i)
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}
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txtjs.getNoteId = function(element) {
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let classNames = Array.from(element.classList).filter(function(className) {
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return className.startsWith('note-')
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})
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if (classNames.length == 0) {
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return
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}
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return classNames[0].substr(5)
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}
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txtjs.getNoteFromSelection = function() {
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let selection = getSelection()
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try {
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var range = selection.getRangeAt(0)
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} catch(e) {
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return
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}
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if (range.collapsed) {
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return
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}
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let container = range.commonAncestorContainer
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if (container.id != 'txt') {
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while (container != document.body) {
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container = container.parentElement
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if (container.id == 'txt') {
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break
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}
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}
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}
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if (container.id != 'txt') {
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return
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}
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let position = txtjs.getPosition(range)
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let pos = position.split(',').map(function(v) {
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return parseInt(v)
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})
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let note = {
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id: txtjs.getNewId(),
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position: position,
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text: txtjs.text.substr(pos[0], pos[1] - pos[0]),
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editable: true
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}
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if (txtjs.noteExists(note)) {
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return
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}
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return note
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}
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txtjs.getPosition = function(range) {
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let container = document.querySelector('#txt')
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let nodes = Array.from(container.childNodes)
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let startNodeIndex = range.startContainer == container
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? range.startOffset : nodes.indexOf(range.startContainer)
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let endNodeIndex = range.endContainer == container
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? range.endOffset : nodes.indexOf(range.endContainer)
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let startOffset = range.startContainer == container ? 0 : range.startOffset
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let endOffset = range.endContainer == container ? 0 : range.endOffset
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let index = 0
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let start = 0
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let end = 0
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for (let i = 0; i <= endNodeIndex; i++) {
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if (i == startNodeIndex) {
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start = index + startOffset
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}
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if (i == endNodeIndex) {
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end = index + endOffset
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}
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if (nodes[i].nodeType == 1) { // <br>
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index++
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} else {
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index += nodes[i].textContent.length
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}
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}
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while (' \n'.includes(txtjs.text.substr(start, 1))) {
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start++
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}
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while (' \n'.includes(txtjs.text.substr(end - 1, 1))) {
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end--
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}
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return start + ',' + end
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}
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txtjs.getRange = function(id, start, end) {
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let startContainer, startOffset, endContainer, endOffset
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let container = document.querySelector('#' + id)
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let nodes = Array.from(container.childNodes)
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let index = 0
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for (let i = 0; i < nodes.length; i++) {
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if (start < index + nodes[i].textContent.length && startOffset === void 0) {
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startContainer = nodes[i]
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startOffset = start - index
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}
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if (end <= index + nodes[i].textContent.length) {
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endContainer = nodes[i]
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endOffset = end - index
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break
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}
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if (nodes[i].nodeType == 1) { // <br>
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index++
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} else {
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index += nodes[i].textContent.length
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}
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}
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let range = document.createRange()
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range.setStart(startContainer, startOffset)
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range.setEnd(endContainer, endOffset)
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return range
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}
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txtjs.getSelectedNote = function() {
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let elements = Array.from(document.querySelectorAll('g.selected'))
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if (elements.length == 0) {
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return
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}
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let id = txtjs.getNoteId(elements[0])
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return Object.assign(Ox.getObjectById(txtjs.notes, id), {
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elements: elements
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})
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}
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txtjs.noteExists = function(note) {
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return txtjs.notes.some(function(note_) {
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return note_.position == note.position
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})
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}
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txtjs.onMessage = function(data, event) {
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console.log('onMessage', event, data)
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if (event == 'selectAnnotation') {
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txtjs.selectNote(data.id, false)
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} else if (event == 'addAnnotation') {
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txtjs.addNoteFromSelection()
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} else if (event == 'addAnnotations') {
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if (data.reset) {
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// fixme
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}
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data.annotations.forEach(function(note) {
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////
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note.position = note.position.replace(':', ',')
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////
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txtjs.renderNote(note)
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txtjs.notes.push(note)
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})
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} else if (event == 'removeAnnotation') {
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txtjs.selectNote(data.id)
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txtjs.removeNote()
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}
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}
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txtjs.postMessage = function(action, data) {
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console.log('postMessage', action, data)
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Ox.$parent.postMessage(action.replace('Note', 'Annotation'), data)
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}
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txtjs.removeNote = function() {
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let selected = txtjs.getSelectedNote()
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if (!selected) {
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return
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}
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let id = txtjs.getNoteId(selected.elements[0])
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selected.elements.forEach(function(element) {
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element.parentElement.removeChild(element)
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})
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let index = txtjs.notes.map(function(note) {
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return note.id
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}).indexOf(id)
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txtjs.notes.splice(index, 1)
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txtjs.postMessage('removeNote', {
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id: id
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})
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}
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txtjs.renderNote = function(note) {
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let pos = note.position.split(',').map(function(v) {
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return parseInt(v)
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})
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let ids = ['txt', 'txt-scroll']
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ids.forEach(function(id) {
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let range = txtjs.getRange(id, pos[0], pos[1])
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let rects = Array.from(range.getClientRects())
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let size = rects.reduce(function(width, rect) {
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return width + rect.width
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}, 0)
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let maxHeight = 8192
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let firstIndex = Math.floor((rects[0].top + window.pageYOffset) / maxHeight)
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let lastIndex = Math.floor((rects[rects.length - 1].top + window.pageYOffset + rects[rects.length - 1].height) / maxHeight)
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for (let index = firstIndex; index <= lastIndex; index++) {
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let g = txtjs.createSVGElement('g')
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g.classList.add('note-' + note.id)
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g.classList.add('selectable')
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if (note.editable) {
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g.classList.add('editable')
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}
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g.setAttribute('data-size', size)
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g.setAttribute('pointer-events', id == 'txt' ? 'all' : 'none')
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rects.forEach(function(rect) {
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let element = txtjs.createSVGElement('rect')
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let x = id == 'txt' ? rect.left
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: rect.left - document.querySelector('#scroll').getBoundingClientRect().left + 8
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let y = id == 'txt' ? rect.top + window.pageYOffset - index * maxHeight
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: rect.top + document.querySelector('#scroll').scrollTop - 16 - index * maxHeight
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element.setAttribute('x', x)
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element.setAttribute('y', y)
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element.setAttribute('width', rect.width)
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element.setAttribute('height', rect.height)
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g.appendChild(element)
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})
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let svg = document.querySelector('svg#svg-' + id + '-' + index)
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for (let i = 0; i < svg.children.length; i++) {
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let childSize = parseInt(svg.children[i].getAttribute('data-size'))
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if (size > childSize) {
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svg.insertBefore(g, svg.children[i])
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break
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}
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}
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if (!g.parentElement) {
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svg.appendChild(g)
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}
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}
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})
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}
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txtjs.renderSVG = function(id, index, width, height) {
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function mousedown(e) {
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svg.addEventListener('mouseup', mouseup)
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timeout = setTimeout(function() {
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svg.removeEventListener('mouseup', mouseup)
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e.target.classList.remove('selectable')
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e.target.setAttribute('pointer-events', 'none')
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document.addEventListener('mouseup', function() {
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e.target.classList.add('selectable')
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e.target.setAttribute('pointer-events', 'all')
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})
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}, 250)
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}
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function mouseup(e) {
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clearTimeout(timeout)
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txtjs.selectNote(txtjs.getNoteId(e.target.parentElement))
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}
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let timeout
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let svg = txtjs.createSVGElement('svg')
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svg.setAttribute('id', 'svg-' + id + '-' + index)
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svg.setAttribute('pointer-events', 'none')
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if (id == 'txt') {
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svg.style.left = 0
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} else {
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svg.style.right = '8px'
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}
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svg.style.top = index * 8192 + 'px'
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svg.style.width = width + 'px'
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svg.style.height = height + 'px'
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if (id == 'txt') {
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svg.addEventListener('mousedown', mousedown)
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}
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let parentElement = id == 'txt' ? document.body : document.querySelector('#scroll')
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parentElement.appendChild(svg)
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}
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txtjs.renderSVGs = function() {
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let maxHeight = 8192
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let ids = ['txt', 'txt-scroll']
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ids.forEach(function(id) {
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let rect = document.querySelector('#' + id).getBoundingClientRect()
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let lastHeight = rect.height % maxHeight
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let n = Math.ceil(rect.height / maxHeight)
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for (let i = 0; i < n; i++) {
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txtjs.renderSVG(id, i, rect.width, i < n - 1 ? maxHeight : lastHeight)
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}
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})
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}
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txtjs.renderText = function(text) {
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txtjs.text = text
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html = text.replace(/</g, '<').replace(/>/g, '>')
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html = html.replace().replace(/\r\n/g, '\n').replace(/[\r\n]/g, '<br>')
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txtjs.html = Ox.encodeHTMLEntities(text).replace(/\r\n/g, '\n').replace(/[\r\n]/g, '<br>')
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window.addEventListener('mouseup', onMouseup)
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window.addEventListener('resize', onResize)
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window.addEventListener('scroll', onScroll)
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document.addEventListener('keydown', function(e) {
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console.log(e.keyCode)
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if (e.keyCode == 8 || e.keyCode == 46) { // BACKSPACE || DELETE
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txtjs.removeNote()
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} else if (e.keyCode == 13) { // ENTER
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if (e.shiftKey) {
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txtjs.beginEdit()
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} else if (document.querySelector('g.editing')) {
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txtjs.editNote()
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} else {
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txtjs.addNoteFromSelection()
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}
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} else if (e.keyCode == 27) { // ESCAPE
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if (document.querySelector('g.editing')) {
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txtjs.cancelEdit()
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}
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if (document.querySelector('g.selected')) {
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txtjs.selectNote(null)
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}
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} else if (e.keyCode == 37) { // LEFT
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txtjs.selectNextNote(-1)
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} else if (e.keyCode == 39) { // RIGHT
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txtjs.selectNextNote(1)
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}
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})
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let style = document.createElement('style')
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style.innerText = [
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'svg { mix-blend-mode: multiply; position: absolute }',
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'g { fill: rgb(255, 255, 192); fill-opacity: 0.5 }',
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'g.selectable { cursor: pointer }',
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'g.editable { fill: rgb(255, 255, 0) }',
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'g.selected { fill: rgb(224, 240, 255) }',
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'g.editable.selected { fill: rgb(128, 192, 255) }',
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'g.editable.editing { fill: rgb(128, 255, 128) }',
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'::selection { background: rgb(192, 192, 192) }'
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].join('\n')
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document.head.appendChild(style)
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document.body.style.backgroundColor = 'rgb(255, 255, 255)'
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document.body.style.margin = 0
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document.body.style.overflowX = 'hidden'
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let textElement = document.createElement('div')
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textElement.id = 'txt'
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textElement.style.fontFamily = 'Georgia, Palatino, DejaVu Serif, Book Antiqua, Palatino Linotype, Times New Roman, serif',
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textElement.style.fontSize = '20px'
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textElement.style.lineHeight = '30px'
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textElement.style.padding = '10% 20% 10% 10%'
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textElement.innerHTML = txtjs.html
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textElement.addEventListener('mousedown', function() {
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txtjs.selectNote(null)
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})
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document.body.appendChild(textElement)
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let scrollElement = document.createElement('div')
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scrollElement.id = 'scroll'
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scrollElement.style.bottom = '16px'
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scrollElement.style.overflow = 'hidden'
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scrollElement.style.position = 'fixed'
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scrollElement.style.right = '24px'
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scrollElement.style.width = '7%'
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scrollElement.style.top = '16px'
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document.body.appendChild(scrollElement)
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let scrollTextElement = document.createElement('div')
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scrollTextElement.id = 'txt-scroll'
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scrollTextElement.style.cursor = 'pointer'
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scrollTextElement.style.fontFamily = 'Georgia, Palatino, DejaVu Serif, Book Antiqua, Palatino Linotype, Times New Roman, serif',
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scrollTextElement.style.fontSize = '2px'
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scrollTextElement.style.lineHeight = '3px'
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scrollTextElement.style.MozUserSelect = 'none'
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scrollTextElement.style.WebkitUserSelect = 'none'
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scrollTextElement.innerHTML = txtjs.html
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scrollTextElement.addEventListener('mousedown', function(e) {
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let offset = 'offsetY' in e ? e.offsetY : e.layerY
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document.documentElement.scrollTop = offset / factor + margin - 16
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})
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scrollElement.appendChild(scrollTextElement)
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txtjs.renderSVGs()
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let factor, margin
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onResize()
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function onMouseup() {
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let note = txtjs.getNoteFromSelection()
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if (!note || txtjs.noteExists(note)) {
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txtjs.postMessage('selectText', null)
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} else {
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txtjs.postMessage('selectText', note)
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}
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}
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function onResize() {
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factor = scrollTextElement.clientHeight / textElement.clientHeight
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margin = textElement.offsetWidth * 0.1
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setTimeout(function() {
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Array.from(document.querySelectorAll('svg')).forEach(function(svg) {
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svg.parentElement.removeChild(svg)
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})
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txtjs.renderSVGs()
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txtjs.mark(txtjs.notes)
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})
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}
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function onScroll() {
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scrollElement.scrollTop = (window.pageYOffset - margin + 16) * factor
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}
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}
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txtjs.selectNextNote = function(direction) {
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let selected = txtjs.getSelectedNote()
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if (!selected) {
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return
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}
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let id = txtjs.getNoteId(selected.elements[0])
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let ids = txtjs.notes.sort(function(a, b) {
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return parseInt(a.position.split()[0]) - parseInt(b.position.split()[0])
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}).map(function(note) {
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return note.id
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})
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txtjs.selectNote(ids[Ox.mod(ids.indexOf(id) + direction, ids.length)])
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}
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txtjs.selectNote = function(id, trigger) {
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let selected = txtjs.getSelectedNote()
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if (selected) {
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selected.elements.forEach(function(element) {
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element.classList.remove('selected')
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})
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}
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if (id) {
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let editing = Array.from(document.querySelectorAll('g.editing'))
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if (editing.length && txtjs.getNoteId(editing[0]) != id) {
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editing.forEach(function(element) {
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element.classList.remove('editing')
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})
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}
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let elements = Array.from(document.querySelectorAll('g.note-' + id))
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elements.forEach(function(element) {
|
|
element.classList.add('selected')
|
|
})
|
|
for (let i = 0; i < elements.length; i++) {
|
|
if (!elements[i].parentNode.id.includes('scroll')) {
|
|
elements[i].scrollIntoViewIfNeeded && elements[i].scrollIntoViewIfNeeded()
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if (trigger !== false) {
|
|
txtjs.postMessage('selectNote', {id: id})
|
|
}
|
|
}
|