atom/src/lines-component.coffee at master · tml/atom · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

_ = require 'underscore-plus'

React = require 'react-atom-fork'

{div, span} = require 'reactionary-atom-fork'

{debounce, isEqual, isEqualForProperties, multiplyString, toArray} = require 'underscore-plus'

{$$} = require 'space-pen'

Decoration = require './decoration'

CursorsComponent = require './cursors-component'

HighlightsComponent = require './highlights-component'

OverlayManager = require './overlay-manager'

DummyLineNode = $$(-> @div className: 'line', style: 'position: absolute; visibility: hidden;', => @span 'x')[0]

AcceptFilter = {acceptNode: -> NodeFilter.FILTER_ACCEPT}

WrapperDiv = document.createElement('div')

module.exports =

LinesComponent = React.createClass

displayName: 'LinesComponent'

render: ->

{performedInitialMeasurement, cursorBlinkPeriod, cursorBlinkResumeDelay} = @props

if performedInitialMeasurement

{editor, overlayDecorations, highlightDecorations, scrollHeight, scrollWidth, placeholderText, backgroundColor} = @props

{lineHeightInPixels, defaultCharWidth, scrollViewHeight, scopedCharacterWidthsChangeCount} = @props

{scrollTop, scrollLeft, cursorPixelRects} = @props

style =

height: Math.max(scrollHeight, scrollViewHeight)

width: scrollWidth

WebkitTransform: @getTransform()

backgroundColor: if editor.isMini() then null else backgroundColor

div {className: 'lines', style},

div className: 'placeholder-text', placeholderText if placeholderText?

CursorsComponent {

cursorPixelRects, cursorBlinkPeriod, cursorBlinkResumeDelay, lineHeightInPixels,

defaultCharWidth, scopedCharacterWidthsChangeCount, performedInitialMeasurement

}

HighlightsComponent {

editor, highlightDecorations, lineHeightInPixels, defaultCharWidth,

scopedCharacterWidthsChangeCount, performedInitialMeasurement

}

getTransform: ->

{scrollTop, scrollLeft, useHardwareAcceleration} = @props

if useHardwareAcceleration

"translate3d(#{-scrollLeft}px, #{-scrollTop}px, 0px)"

else

"translate(#{-scrollLeft}px, #{-scrollTop}px)"

componentWillMount: ->

@measuredLines = new WeakSet

@lineNodesByLineId = {}

@screenRowsByLineId = {}

@lineIdsByScreenRow = {}

@renderedDecorationsByLineId = {}

componentDidMount: ->

if @props.useShadowDOM

insertionPoint = document.createElement('content')

insertionPoint.setAttribute('select', '.overlayer')

@getDOMNode().appendChild(insertionPoint)

insertionPoint = document.createElement('content')

insertionPoint.setAttribute('select', 'atom-overlay')

@overlayManager = new OverlayManager(@props.hostElement)

@getDOMNode().appendChild(insertionPoint)

else

@overlayManager = new OverlayManager(@getDOMNode())

shouldComponentUpdate: (newProps) ->

return true unless isEqualForProperties(newProps, @props,

'renderedRowRange', 'lineDecorations', 'highlightDecorations', 'lineHeightInPixels', 'defaultCharWidth',

'overlayDecorations', 'scrollTop', 'scrollLeft', 'showIndentGuide', 'scrollingVertically', 'visible',

'scrollViewHeight', 'mouseWheelScreenRow', 'scopedCharacterWidthsChangeCount', 'lineWidth', 'useHardwareAcceleration',

'placeholderText', 'performedInitialMeasurement', 'backgroundColor', 'cursorPixelRects'

)

{renderedRowRange, pendingChanges} = newProps

return false unless renderedRowRange?

[renderedStartRow, renderedEndRow] = renderedRowRange

for change in pendingChanges

if change.screenDelta is 0

return true unless change.end < renderedStartRow or renderedEndRow <= change.start

else

return true unless renderedEndRow <= change.start

false

componentDidUpdate: (prevProps) ->

{visible, scrollingVertically, performedInitialMeasurement} = @props

return unless performedInitialMeasurement

@clearScreenRowCaches() unless prevProps.lineHeightInPixels is @props.lineHeightInPixels

@removeLineNodes() unless isEqualForProperties(prevProps, @props, 'showIndentGuide')

@updateLines(@props.lineWidth isnt prevProps.lineWidth)

@measureCharactersInNewLines() if visible and not scrollingVertically

@overlayManager?.render(@props)

clearScreenRowCaches: ->

@screenRowsByLineId = {}

@lineIdsByScreenRow = {}

updateLines: (updateWidth) ->

{tokenizedLines, renderedRowRange, showIndentGuide, selectionChanged, lineDecorations} = @props

[startRow] = renderedRowRange

@removeLineNodes(tokenizedLines)

@appendOrUpdateVisibleLineNodes(tokenizedLines, startRow, updateWidth)

removeLineNodes: (visibleLines=[]) ->

{mouseWheelScreenRow} = @props

visibleLineIds = new Set

visibleLineIds.add(line.id.toString()) for line in visibleLines

node = @getDOMNode()

for lineId, lineNode of @lineNodesByLineId when not visibleLineIds.has(lineId)

screenRow = @screenRowsByLineId[lineId]

if not screenRow? or screenRow isnt mouseWheelScreenRow

delete @lineNodesByLineId[lineId]

delete @lineIdsByScreenRow[screenRow] if @lineIdsByScreenRow[screenRow] is lineId

delete @screenRowsByLineId[lineId]

delete @renderedDecorationsByLineId[lineId]

node.removeChild(lineNode)

appendOrUpdateVisibleLineNodes: (visibleLines, startRow, updateWidth) ->

{lineDecorations} = @props

newLines = null

newLinesHTML = null

for line, index in visibleLines

screenRow = startRow + index

if @hasLineNode(line.id)

@updateLineNode(line, screenRow, updateWidth)

else

newLines ?= []

newLinesHTML ?= ""

newLines.push(line)

newLinesHTML += @buildLineHTML(line, screenRow)

@screenRowsByLineId[line.id] = screenRow

@lineIdsByScreenRow[screenRow] = line.id

@renderedDecorationsByLineId[line.id] = lineDecorations[screenRow]

return unless newLines?

WrapperDiv.innerHTML = newLinesHTML

newLineNodes = toArray(WrapperDiv.children)

node = @getDOMNode()

for line, i in newLines

lineNode = newLineNodes[i]

@lineNodesByLineId[line.id] = lineNode

node.appendChild(lineNode)

hasLineNode: (lineId) ->

@lineNodesByLineId.hasOwnProperty(lineId)

buildLineHTML: (line, screenRow) ->

{showIndentGuide, lineHeightInPixels, lineDecorations, lineWidth} = @props

{tokens, text, lineEnding, fold, isSoftWrapped, indentLevel} = line

classes = ''

if decorations = lineDecorations[screenRow]

for id, decoration of decorations

if Decoration.isType(decoration, 'line')

classes += decoration.class + ' '

classes += 'line'

top = screenRow * lineHeightInPixels

lineHTML = "<div class=\"#{classes}\" style=\"position: absolute; top: #{top}px; width: #{lineWidth}px;\" data-screen-row=\"#{screenRow}\">"

if text is ""

lineHTML += @buildEmptyLineInnerHTML(line)

else

lineHTML += @buildLineInnerHTML(line)

lineHTML += '' if fold

lineHTML += "</div>"

lineHTML

buildEmptyLineInnerHTML: (line) ->

{showIndentGuide} = @props

{indentLevel, tabLength, endOfLineInvisibles} = line

if showIndentGuide and indentLevel > 0

invisibleIndex = 0

lineHTML = ''

for i in [0...indentLevel]

lineHTML += ""

for j in [0...tabLength]

if invisible = endOfLineInvisibles?[invisibleIndex++]

lineHTML += "#{invisible}"

else

lineHTML += ' '

lineHTML += ""

while invisibleIndex < endOfLineInvisibles?.length

lineHTML += "#{line.endOfLineInvisibles[invisibleIndex++]}"

lineHTML

else

@buildEndOfLineHTML(line) or ' '

buildLineInnerHTML: (line) ->

{editor, showIndentGuide} = @props

{tokens, text} = line

innerHTML = ""

scopeStack = []

firstTrailingWhitespacePosition = text.search(/\s*$/)

lineIsWhitespaceOnly = firstTrailingWhitespacePosition is 0

for token in tokens

innerHTML += @updateScopeStack(scopeStack, token.scopes)

hasIndentGuide = not editor.isMini() and showIndentGuide and (token.hasLeadingWhitespace() or (token.hasTrailingWhitespace() and lineIsWhitespaceOnly))

innerHTML += token.getValueAsHtml({hasIndentGuide})

innerHTML += @popScope(scopeStack) while scopeStack.length > 0

innerHTML += @buildEndOfLineHTML(line)

innerHTML

buildEndOfLineHTML: (line) ->

{endOfLineInvisibles} = line

html = ''

if endOfLineInvisibles?

for invisible in endOfLineInvisibles

html += "#{invisible}"

html

updateScopeStack: (scopeStack, desiredScopeDescriptor) ->

html = ""

# Find a common prefix

for scope, i in desiredScopeDescriptor

break unless scopeStack[i] is desiredScopeDescriptor[i]

# Pop scopeDescriptor until we're at the common prefx

until scopeStack.length is i

html += @popScope(scopeStack)

# Push onto common prefix until scopeStack equals desiredScopeDescriptor

for j in [i...desiredScopeDescriptor.length]

html += @pushScope(scopeStack, desiredScopeDescriptor[j])

html

popScope: (scopeStack) ->

scopeStack.pop()

""

pushScope: (scopeStack, scope) ->

scopeStack.push(scope)

""

updateLineNode: (line, screenRow, updateWidth) ->

{lineHeightInPixels, lineDecorations, lineWidth} = @props

lineNode = @lineNodesByLineId[line.id]

decorations = lineDecorations[screenRow]

previousDecorations = @renderedDecorationsByLineId[line.id]

if previousDecorations?

for id, decoration of previousDecorations

if Decoration.isType(decoration, 'line') and not @hasDecoration(decorations, decoration)

lineNode.classList.remove(decoration.class)

if decorations?

for id, decoration of decorations

if Decoration.isType(decoration, 'line') and not @hasDecoration(previousDecorations, decoration)

lineNode.classList.add(decoration.class)

lineNode.style.width = lineWidth + 'px' if updateWidth

unless @screenRowsByLineId[line.id] is screenRow

lineNode.style.top = screenRow * lineHeightInPixels + 'px'

lineNode.dataset.screenRow = screenRow

@screenRowsByLineId[line.id] = screenRow

@lineIdsByScreenRow[screenRow] = line.id

hasDecoration: (decorations, decoration) ->

decorations? and decorations[decoration.id] is decoration

lineNodeForScreenRow: (screenRow) ->

@lineNodesByLineId[@lineIdsByScreenRow[screenRow]]

measureLineHeightAndDefaultCharWidth: ->

node = @getDOMNode()

node.appendChild(DummyLineNode)

lineHeightInPixels = DummyLineNode.getBoundingClientRect().height

charWidth = DummyLineNode.firstChild.getBoundingClientRect().width

node.removeChild(DummyLineNode)

{editor} = @props

editor.setLineHeightInPixels(lineHeightInPixels)

editor.setDefaultCharWidth(charWidth)

remeasureCharacterWidths: ->

return unless @props.performedInitialMeasurement

@clearScopedCharWidths()

@measureCharactersInNewLines()

measureCharactersInNewLines: ->

{editor, tokenizedLines, renderedRowRange} = @props

[visibleStartRow] = renderedRowRange

node = @getDOMNode()

editor.batchCharacterMeasurement =>

for tokenizedLine in tokenizedLines

unless @measuredLines.has(tokenizedLine)

lineNode = @lineNodesByLineId[tokenizedLine.id]

@measureCharactersInLine(tokenizedLine, lineNode)

return

measureCharactersInLine: (tokenizedLine, lineNode) ->

{editor} = @props

rangeForMeasurement = null

iterator = null

charIndex = 0

for {value, scopes, hasPairedCharacter} in tokenizedLine.tokens

charWidths = editor.getScopedCharWidths(scopes)

valueIndex = 0

while valueIndex < value.length

if hasPairedCharacter

char = value.substr(valueIndex, 2)

charLength = 2

valueIndex += 2

else

char = value[valueIndex]

charLength = 1

valueIndex++

continue if char is '\0'

unless charWidths[char]?

unless textNode?

rangeForMeasurement ?= document.createRange()

iterator = document.createNodeIterator(lineNode, NodeFilter.SHOW_TEXT, AcceptFilter)

textNode = iterator.nextNode()

textNodeIndex = 0

nextTextNodeIndex = textNode.textContent.length

while nextTextNodeIndex <= charIndex

textNode = iterator.nextNode()

textNodeIndex = nextTextNodeIndex

nextTextNodeIndex = textNodeIndex + textNode.textContent.length

i = charIndex - textNodeIndex

rangeForMeasurement.setStart(textNode, i)

rangeForMeasurement.setEnd(textNode, i + charLength)

charWidth = rangeForMeasurement.getBoundingClientRect().width

editor.setScopedCharWidth(scopes, char, charWidth)

charIndex += charLength

@measuredLines.add(tokenizedLine)

clearScopedCharWidths: ->

@measuredLines.clear()

@props.editor.clearScopedCharWidths()

atom/src/lines-component.coffee at master · tml/atom · GitHub

Repository navigation

Expand file tree

Breadcrumbs

lines-component.coffee

Latest commit

History

Breadcrumbs

lines-component.coffee

File metadata and controls