HackMD/public/js/lib/editor/index.js
2017-09-27 21:27:33 +08:00

508 lines
15 KiB
JavaScript

import * as utils from './utils'
import config from './config'
import statusBarTemplate from './statusbar.html'
/* config section */
const isMac = CodeMirror.keyMap.default === CodeMirror.keyMap.macDefault
const defaultEditorMode = 'gfm'
const viewportMargin = 20
const jumpToAddressBarKeymapName = isMac ? 'Cmd-L' : 'Ctrl-L'
export default class Editor {
constructor () {
this.editor = null
this.jumpToAddressBarKeymapValue = null
this.defaultExtraKeys = {
F10: function (cm) {
cm.setOption('fullScreen', !cm.getOption('fullScreen'))
},
Esc: function (cm) {
if (cm.getOption('keyMap').substr(0, 3) === 'vim') {
return CodeMirror.Pass
} else if (cm.getOption('fullScreen')) {
cm.setOption('fullScreen', false)
}
},
'Cmd-S': function () {
return false
},
'Ctrl-S': function () {
return false
},
Enter: 'newlineAndIndentContinueMarkdownList',
Tab: function (cm) {
var tab = '\t'
// contruct x length spaces
var spaces = Array(parseInt(cm.getOption('indentUnit')) + 1).join(' ')
// auto indent whole line when in list or blockquote
var cursor = cm.getCursor()
var line = cm.getLine(cursor.line)
// this regex match the following patterns
// 1. blockquote starts with "> " or ">>"
// 2. unorder list starts with *+-
// 3. order list starts with "1." or "1)"
var regex = /^(\s*)(>[> ]*|[*+-]\s|(\d+)([.)]))/
var match
var multiple = cm.getSelection().split('\n').length > 1 ||
cm.getSelections().length > 1
if (multiple) {
cm.execCommand('defaultTab')
} else if ((match = regex.exec(line)) !== null) {
var ch = match[1].length
var pos = {
line: cursor.line,
ch: ch
}
if (cm.getOption('indentWithTabs')) {
cm.replaceRange(tab, pos, pos, '+input')
} else {
cm.replaceRange(spaces, pos, pos, '+input')
}
} else {
if (cm.getOption('indentWithTabs')) {
cm.execCommand('defaultTab')
} else {
cm.replaceSelection(spaces)
}
}
},
'Cmd-Left': 'goLineLeftSmart',
'Cmd-Right': 'goLineRight',
'Home': 'goLineLeftSmart',
'End': 'goLineRight',
'Ctrl-C': function (cm) {
if (!isMac && cm.getOption('keyMap').substr(0, 3) === 'vim') {
document.execCommand('copy')
} else {
return CodeMirror.Pass
}
},
'Ctrl-*': cm => {
utils.wrapTextWith(this.editor, cm, '*')
},
'Shift-Ctrl-8': cm => {
utils.wrapTextWith(this.editor, cm, '*')
},
'Ctrl-_': cm => {
utils.wrapTextWith(this.editor, cm, '_')
},
'Shift-Ctrl--': cm => {
utils.wrapTextWith(this.editor, cm, '_')
},
'Ctrl-~': cm => {
utils.wrapTextWith(this.editor, cm, '~')
},
'Shift-Ctrl-`': cm => {
utils.wrapTextWith(this.editor, cm, '~')
},
'Ctrl-^': cm => {
utils.wrapTextWith(this.editor, cm, '^')
},
'Shift-Ctrl-6': cm => {
utils.wrapTextWith(this.editor, cm, '^')
},
'Ctrl-+': cm => {
utils.wrapTextWith(this.editor, cm, '+')
},
'Shift-Ctrl-=': cm => {
utils.wrapTextWith(this.editor, cm, '+')
},
'Ctrl-=': cm => {
utils.wrapTextWith(this.editor, cm, '=')
},
'Shift-Ctrl-Backspace': cm => {
utils.wrapTextWith(this.editor, cm, 'Backspace')
}
}
this.eventListeners = {}
this.config = config
}
on (event, cb) {
if (!this.eventListeners[event]) {
this.eventListeners[event] = [cb]
} else {
this.eventListeners[event].push(cb)
}
this.editor.on(event, (...args) => {
this.eventListeners[event].forEach(cb => cb.bind(this)(...args))
})
}
addStatusBar () {
this.statusBar = $(statusBarTemplate)
this.statusCursor = this.statusBar.find('.status-cursor > .status-line-column')
this.statusSelection = this.statusBar.find('.status-cursor > .status-selection')
this.statusFile = this.statusBar.find('.status-file')
this.statusIndicators = this.statusBar.find('.status-indicators')
this.statusIndent = this.statusBar.find('.status-indent')
this.statusKeymap = this.statusBar.find('.status-keymap')
this.statusLength = this.statusBar.find('.status-length')
this.statusTheme = this.statusBar.find('.status-theme')
this.statusSpellcheck = this.statusBar.find('.status-spellcheck')
this.statusPreferences = this.statusBar.find('.status-preferences')
this.statusPanel = this.editor.addPanel(this.statusBar[0], {
position: 'bottom'
})
this.setIndent()
this.setKeymap()
this.setTheme()
this.setSpellcheck()
this.setPreferences()
}
updateStatusBar () {
if (!this.statusBar) return
var cursor = this.editor.getCursor()
var cursorText = 'Line ' + (cursor.line + 1) + ', Columns ' + (cursor.ch + 1)
this.statusCursor.text(cursorText)
var fileText = ' — ' + editor.lineCount() + ' Lines'
this.statusFile.text(fileText)
var docLength = editor.getValue().length
this.statusLength.text('Length ' + docLength)
if (docLength > (config.docmaxlength * 0.95)) {
this.statusLength.css('color', 'red')
this.statusLength.attr('title', 'Your almost reach note max length limit.')
} else if (docLength > (config.docmaxlength * 0.8)) {
this.statusLength.css('color', 'orange')
this.statusLength.attr('title', 'You nearly fill the note, consider to make more pieces.')
} else {
this.statusLength.css('color', 'white')
this.statusLength.attr('title', 'You could write up to ' + config.docmaxlength + ' characters in this note.')
}
}
setIndent () {
var cookieIndentType = Cookies.get('indent_type')
var cookieTabSize = parseInt(Cookies.get('tab_size'))
var cookieSpaceUnits = parseInt(Cookies.get('space_units'))
if (cookieIndentType) {
if (cookieIndentType === 'tab') {
this.editor.setOption('indentWithTabs', true)
if (cookieTabSize) {
this.editor.setOption('indentUnit', cookieTabSize)
}
} else if (cookieIndentType === 'space') {
this.editor.setOption('indentWithTabs', false)
if (cookieSpaceUnits) {
this.editor.setOption('indentUnit', cookieSpaceUnits)
}
}
}
if (cookieTabSize) {
this.editor.setOption('tabSize', cookieTabSize)
}
var type = this.statusIndicators.find('.indent-type')
var widthLabel = this.statusIndicators.find('.indent-width-label')
var widthInput = this.statusIndicators.find('.indent-width-input')
const setType = () => {
if (this.editor.getOption('indentWithTabs')) {
Cookies.set('indent_type', 'tab', {
expires: 365
})
type.text('Tab Size:')
} else {
Cookies.set('indent_type', 'space', {
expires: 365
})
type.text('Spaces:')
}
}
setType()
const setUnit = () => {
var unit = this.editor.getOption('indentUnit')
if (this.editor.getOption('indentWithTabs')) {
Cookies.set('tab_size', unit, {
expires: 365
})
} else {
Cookies.set('space_units', unit, {
expires: 365
})
}
widthLabel.text(unit)
}
setUnit()
type.click(() => {
if (this.editor.getOption('indentWithTabs')) {
this.editor.setOption('indentWithTabs', false)
cookieSpaceUnits = parseInt(Cookies.get('space_units'))
if (cookieSpaceUnits) {
this.editor.setOption('indentUnit', cookieSpaceUnits)
}
} else {
this.editor.setOption('indentWithTabs', true)
cookieTabSize = parseInt(Cookies.get('tab_size'))
if (cookieTabSize) {
this.editor.setOption('indentUnit', cookieTabSize)
this.editor.setOption('tabSize', cookieTabSize)
}
}
setType()
setUnit()
})
widthLabel.click(() => {
if (widthLabel.is(':visible')) {
widthLabel.addClass('hidden')
widthInput.removeClass('hidden')
widthInput.val(this.editor.getOption('indentUnit'))
widthInput.select()
} else {
widthLabel.removeClass('hidden')
widthInput.addClass('hidden')
}
})
widthInput.on('change', () => {
var val = parseInt(widthInput.val())
if (!val) val = this.editor.getOption('indentUnit')
if (val < 1) val = 1
else if (val > 10) val = 10
if (this.editor.getOption('indentWithTabs')) {
this.editor.setOption('tabSize', val)
}
this.editor.setOption('indentUnit', val)
setUnit()
})
widthInput.on('blur', function () {
widthLabel.removeClass('hidden')
widthInput.addClass('hidden')
})
}
setKeymap () {
var cookieKeymap = Cookies.get('keymap')
if (cookieKeymap) {
this.editor.setOption('keyMap', cookieKeymap)
}
var label = this.statusIndicators.find('.ui-keymap-label')
var sublime = this.statusIndicators.find('.ui-keymap-sublime')
var emacs = this.statusIndicators.find('.ui-keymap-emacs')
var vim = this.statusIndicators.find('.ui-keymap-vim')
const setKeymapLabel = () => {
var keymap = this.editor.getOption('keyMap')
Cookies.set('keymap', keymap, {
expires: 365
})
label.text(keymap)
this.restoreOverrideEditorKeymap()
this.setOverrideBrowserKeymap()
}
setKeymapLabel()
sublime.click(() => {
this.editor.setOption('keyMap', 'sublime')
setKeymapLabel()
})
emacs.click(() => {
this.editor.setOption('keyMap', 'emacs')
setKeymapLabel()
})
vim.click(() => {
this.editor.setOption('keyMap', 'vim')
setKeymapLabel()
})
}
setTheme () {
var cookieTheme = Cookies.get('theme')
if (cookieTheme) {
this.editor.setOption('theme', cookieTheme)
}
var themeToggle = this.statusTheme.find('.ui-theme-toggle')
const checkTheme = () => {
var theme = this.editor.getOption('theme')
if (theme === 'one-dark') {
themeToggle.removeClass('active')
} else {
themeToggle.addClass('active')
}
}
themeToggle.click(() => {
var theme = this.editor.getOption('theme')
if (theme === 'one-dark') {
theme = 'default'
} else {
theme = 'one-dark'
}
this.editor.setOption('theme', theme)
Cookies.set('theme', theme, {
expires: 365
})
checkTheme()
})
checkTheme()
}
setSpellcheck () {
var cookieSpellcheck = Cookies.get('spellcheck')
if (cookieSpellcheck) {
var mode = null
if (cookieSpellcheck === 'true' || cookieSpellcheck === true) {
mode = 'spell-checker'
} else {
mode = defaultEditorMode
}
if (mode && mode !== this.editor.getOption('mode')) {
this.editor.setOption('mode', mode)
}
}
var spellcheckToggle = this.statusSpellcheck.find('.ui-spellcheck-toggle')
const checkSpellcheck = () => {
var mode = this.editor.getOption('mode')
if (mode === defaultEditorMode) {
spellcheckToggle.removeClass('active')
} else {
spellcheckToggle.addClass('active')
}
}
spellcheckToggle.click(() => {
var mode = this.editor.getOption('mode')
if (mode === defaultEditorMode) {
mode = 'spell-checker'
} else {
mode = defaultEditorMode
}
if (mode && mode !== this.editor.getOption('mode')) {
this.editor.setOption('mode', mode)
}
Cookies.set('spellcheck', mode === 'spell-checker', {
expires: 365
})
checkSpellcheck()
})
checkSpellcheck()
// workaround spellcheck might not activate beacuse the ajax loading
if (window.num_loaded < 2) {
var spellcheckTimer = setInterval(
() => {
if (window.num_loaded >= 2) {
if (this.editor.getOption('mode') === 'spell-checker') {
this.editor.setOption('mode', 'spell-checker')
}
clearInterval(spellcheckTimer)
}
},
100,
)
}
}
resetEditorKeymapToBrowserKeymap () {
var keymap = this.editor.getOption('keyMap')
if (!this.jumpToAddressBarKeymapValue) {
this.jumpToAddressBarKeymapValue = CodeMirror.keyMap[keymap][jumpToAddressBarKeymapName]
delete CodeMirror.keyMap[keymap][jumpToAddressBarKeymapName]
}
}
restoreOverrideEditorKeymap () {
var keymap = this.editor.getOption('keyMap')
if (this.jumpToAddressBarKeymapValue) {
CodeMirror.keyMap[keymap][jumpToAddressBarKeymapName] = this.jumpToAddressBarKeymapValue
this.jumpToAddressBarKeymapValue = null
}
}
setOverrideBrowserKeymap () {
var overrideBrowserKeymap = $(
'.ui-preferences-override-browser-keymap label > input[type="checkbox"]',
)
if (overrideBrowserKeymap.is(':checked')) {
Cookies.set('preferences-override-browser-keymap', true, {
expires: 365
})
this.restoreOverrideEditorKeymap()
} else {
Cookies.remove('preferences-override-browser-keymap')
this.resetEditorKeymapToBrowserKeymap()
}
}
setPreferences () {
var overrideBrowserKeymap = $(
'.ui-preferences-override-browser-keymap label > input[type="checkbox"]',
)
var cookieOverrideBrowserKeymap = Cookies.get(
'preferences-override-browser-keymap',
)
if (cookieOverrideBrowserKeymap && cookieOverrideBrowserKeymap === 'true') {
overrideBrowserKeymap.prop('checked', true)
} else {
overrideBrowserKeymap.prop('checked', false)
}
this.setOverrideBrowserKeymap()
overrideBrowserKeymap.change(() => {
this.setOverrideBrowserKeymap()
})
}
init (textit) {
this.editor = CodeMirror.fromTextArea(textit, {
mode: defaultEditorMode,
backdrop: defaultEditorMode,
keyMap: 'sublime',
viewportMargin: viewportMargin,
styleActiveLine: true,
lineNumbers: true,
lineWrapping: true,
showCursorWhenSelecting: true,
highlightSelectionMatches: true,
indentUnit: 4,
continueComments: 'Enter',
theme: 'one-dark',
inputStyle: 'textarea',
matchBrackets: true,
autoCloseBrackets: true,
matchTags: {
bothTags: true
},
autoCloseTags: true,
foldGutter: true,
gutters: [
'CodeMirror-linenumbers',
'authorship-gutters',
'CodeMirror-foldgutter'
],
extraKeys: this.defaultExtraKeys,
flattenSpans: true,
addModeClass: true,
readOnly: true,
autoRefresh: true,
otherCursors: true,
placeholder: "← Start by entering a title here\n===\nVisit /features if you don't know what to do.\nHappy hacking :)"
})
return this.editor
}
getEditor () {
return this.editor
}
}