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

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_ = require 'underscore-plus'

HighlightsComponent = require './highlights-component'

AcceptFilter = {acceptNode: -> NodeFilter.FILTER_ACCEPT}

TokenTextEscapeRegex = /[&"'<>]/g

MaxTokenLength = 20000

ZERO_WIDTH_NBSP = '\ufeff'

cloneObject = (object) ->

clone = {}

clone[key] = value for key, value of object

clone

module.exports =

class LinesTileComponent

constructor: ({@presenter, @id, @domElementPool, @assert, grammars}) ->

@measuredLines = new Set

@lineNodesByLineId = {}

@screenRowsByLineId = {}

@lineIdsByScreenRow = {}

@textNodesByLineId = {}

@insertionPointsBeforeLineById = {}

@insertionPointsAfterLineById = {}

@domNode = @domElementPool.buildElement("div")

@domNode.style.position = "absolute"

@domNode.style.display = "block"

@highlightsComponent = new HighlightsComponent(@domElementPool)

@domNode.appendChild(@highlightsComponent.getDomNode())

destroy: ->

@domElementPool.freeElementAndDescendants(@domNode)

getDomNode: ->

@domNode

updateSync: (state) ->

@newState = state

unless @oldState

@oldState = {tiles: {}}

@oldState.tiles[@id] = {lines: {}}

@newTileState = @newState.tiles[@id]

@oldTileState = @oldState.tiles[@id]

if @newState.backgroundColor isnt @oldState.backgroundColor

@domNode.style.backgroundColor = @newState.backgroundColor

@oldState.backgroundColor = @newState.backgroundColor

if @newTileState.zIndex isnt @oldTileState.zIndex

@domNode.style.zIndex = @newTileState.zIndex

@oldTileState.zIndex = @newTileState.zIndex

if @newTileState.display isnt @oldTileState.display

@domNode.style.display = @newTileState.display

@oldTileState.display = @newTileState.display

if @newTileState.height isnt @oldTileState.height

@domNode.style.height = @newTileState.height + 'px'

@oldTileState.height = @newTileState.height

if @newState.width isnt @oldState.width

@domNode.style.width = @newState.width + 'px'

@oldTileState.width = @newTileState.width

if @newTileState.top isnt @oldTileState.top or @newTileState.left isnt @oldTileState.left

@domNode.style['-webkit-transform'] = "translate3d(#{@newTileState.left}px, #{@newTileState.top}px, 0px)"

@oldTileState.top = @newTileState.top

@oldTileState.left = @newTileState.left

@updateLineNodes()

@highlightsComponent.updateSync(@newTileState)

removeLineNodes: ->

@removeLineNode(id) for id of @oldTileState.lines

return

removeLineNode: (id) ->

@domElementPool.freeElementAndDescendants(@lineNodesByLineId[id])

@removeBlockDecorationInsertionPointBeforeLine(id)

@removeBlockDecorationInsertionPointAfterLine(id)

delete @lineNodesByLineId[id]

delete @textNodesByLineId[id]

delete @lineIdsByScreenRow[@screenRowsByLineId[id]]

delete @screenRowsByLineId[id]

delete @oldTileState.lines[id]

updateLineNodes: ->

for id of @oldTileState.lines

unless @newTileState.lines.hasOwnProperty(id)

@removeLineNode(id)

newLineIds = null

newLineNodes = null

for id, lineState of @newTileState.lines

if @oldTileState.lines.hasOwnProperty(id)

@updateLineNode(id)

else

newLineIds ?= []

newLineNodes ?= []

newLineIds.push(id)

newLineNodes.push(@buildLineNode(id))

@screenRowsByLineId[id] = lineState.screenRow

@lineIdsByScreenRow[lineState.screenRow] = id

@oldTileState.lines[id] = cloneObject(lineState)

return unless newLineIds?

for id, i in newLineIds

lineNode = newLineNodes[i]

@lineNodesByLineId[id] = lineNode

if nextNode = @findNodeNextTo(lineNode)

@domNode.insertBefore(lineNode, nextNode)

else

@domNode.appendChild(lineNode)

@insertBlockDecorationInsertionPointBeforeLine(id)

@insertBlockDecorationInsertionPointAfterLine(id)

removeBlockDecorationInsertionPointBeforeLine: (id) ->

if insertionPoint = @insertionPointsBeforeLineById[id]

@domElementPool.freeElementAndDescendants(insertionPoint)

delete @insertionPointsBeforeLineById[id]

insertBlockDecorationInsertionPointBeforeLine: (id) ->

{hasPrecedingBlockDecorations, screenRow} = @newTileState.lines[id]

if hasPrecedingBlockDecorations

lineNode = @lineNodesByLineId[id]

insertionPoint = @domElementPool.buildElement("content")

@domNode.insertBefore(insertionPoint, lineNode)

@insertionPointsBeforeLineById[id] = insertionPoint

insertionPoint.dataset.screenRow = screenRow

@updateBlockDecorationInsertionPointBeforeLine(id)

updateBlockDecorationInsertionPointBeforeLine: (id) ->

oldLineState = @oldTileState.lines[id]

newLineState = @newTileState.lines[id]

insertionPoint = @insertionPointsBeforeLineById[id]

return unless insertionPoint?

if newLineState.screenRow isnt oldLineState.screenRow

insertionPoint.dataset.screenRow = newLineState.screenRow

precedingBlockDecorationsSelector = newLineState.precedingBlockDecorations.map((d) -> ".atom--block-decoration-#{d.id}").join(',')

if precedingBlockDecorationsSelector isnt oldLineState.precedingBlockDecorationsSelector

insertionPoint.setAttribute("select", precedingBlockDecorationsSelector)

oldLineState.precedingBlockDecorationsSelector = precedingBlockDecorationsSelector

removeBlockDecorationInsertionPointAfterLine: (id) ->

if insertionPoint = @insertionPointsAfterLineById[id]

@domElementPool.freeElementAndDescendants(insertionPoint)

delete @insertionPointsAfterLineById[id]

insertBlockDecorationInsertionPointAfterLine: (id) ->

{hasFollowingBlockDecorations, screenRow} = @newTileState.lines[id]

if hasFollowingBlockDecorations

lineNode = @lineNodesByLineId[id]

insertionPoint = @domElementPool.buildElement("content")

@domNode.insertBefore(insertionPoint, lineNode.nextSibling)

@insertionPointsAfterLineById[id] = insertionPoint

insertionPoint.dataset.screenRow = screenRow

@updateBlockDecorationInsertionPointAfterLine(id)

updateBlockDecorationInsertionPointAfterLine: (id) ->

oldLineState = @oldTileState.lines[id]

newLineState = @newTileState.lines[id]

insertionPoint = @insertionPointsAfterLineById[id]

return unless insertionPoint?

if newLineState.screenRow isnt oldLineState.screenRow

insertionPoint.dataset.screenRow = newLineState.screenRow

followingBlockDecorationsSelector = newLineState.followingBlockDecorations.map((d) -> ".atom--block-decoration-#{d.id}").join(',')

if followingBlockDecorationsSelector isnt oldLineState.followingBlockDecorationsSelector

insertionPoint.setAttribute("select", followingBlockDecorationsSelector)

oldLineState.followingBlockDecorationsSelector = followingBlockDecorationsSelector

findNodeNextTo: (node) ->

for nextNode, index in @domNode.children

continue if index is 0 # skips highlights node

return nextNode if @screenRowForNode(node) < @screenRowForNode(nextNode)

return

screenRowForNode: (node) -> parseInt(node.dataset.screenRow)

buildLineNode: (id) ->

{lineText, tagCodes, screenRow, decorationClasses} = @newTileState.lines[id]

lineNode = @domElementPool.buildElement("div", "line")

lineNode.dataset.screenRow = screenRow

if decorationClasses?

for decorationClass in decorationClasses

lineNode.classList.add(decorationClass)

textNodes = []

lineLength = 0

startIndex = 0

openScopeNode = lineNode

for tagCode in tagCodes when tagCode isnt 0

if @presenter.isCloseTagCode(tagCode)

openScopeNode = openScopeNode.parentElement

else if @presenter.isOpenTagCode(tagCode)

scope = @presenter.tagForCode(tagCode)

newScopeNode = @domElementPool.buildElement("span", scope.replace(/\.+/g, ' '))

openScopeNode.appendChild(newScopeNode)

openScopeNode = newScopeNode

else

textNode = @domElementPool.buildText(lineText.substr(startIndex, tagCode))

startIndex += tagCode

openScopeNode.appendChild(textNode)

textNodes.push(textNode)

if startIndex is 0

textNode = @domElementPool.buildText(' ')

lineNode.appendChild(textNode)

textNodes.push(textNode)

if lineText.endsWith(@presenter.displayLayer.foldCharacter)

# Insert a zero-width non-breaking whitespace, so that

# LinesYardstick can take the fold-marker::after pseudo-element

# into account during measurements when such marker is the last

# character on the line.

textNode = @domElementPool.buildText(ZERO_WIDTH_NBSP)

lineNode.appendChild(textNode)

textNodes.push(textNode)

@textNodesByLineId[id] = textNodes

lineNode

updateLineNode: (id) ->

oldLineState = @oldTileState.lines[id]

newLineState = @newTileState.lines[id]

lineNode = @lineNodesByLineId[id]

newDecorationClasses = newLineState.decorationClasses

oldDecorationClasses = oldLineState.decorationClasses

if oldDecorationClasses?

for decorationClass in oldDecorationClasses

unless newDecorationClasses? and decorationClass in newDecorationClasses

lineNode.classList.remove(decorationClass)

if newDecorationClasses?

for decorationClass in newDecorationClasses

unless oldDecorationClasses? and decorationClass in oldDecorationClasses

lineNode.classList.add(decorationClass)

oldLineState.decorationClasses = newLineState.decorationClasses

if not oldLineState.hasPrecedingBlockDecorations and newLineState.hasPrecedingBlockDecorations

@insertBlockDecorationInsertionPointBeforeLine(id)

else if oldLineState.hasPrecedingBlockDecorations and not newLineState.hasPrecedingBlockDecorations

@removeBlockDecorationInsertionPointBeforeLine(id)

if not oldLineState.hasFollowingBlockDecorations and newLineState.hasFollowingBlockDecorations

@insertBlockDecorationInsertionPointAfterLine(id)

else if oldLineState.hasFollowingBlockDecorations and not newLineState.hasFollowingBlockDecorations

@removeBlockDecorationInsertionPointAfterLine(id)

if newLineState.screenRow isnt oldLineState.screenRow

lineNode.dataset.screenRow = newLineState.screenRow

@lineIdsByScreenRow[newLineState.screenRow] = id

@screenRowsByLineId[id] = newLineState.screenRow

@updateBlockDecorationInsertionPointBeforeLine(id)

@updateBlockDecorationInsertionPointAfterLine(id)

oldLineState.screenRow = newLineState.screenRow

oldLineState.hasPrecedingBlockDecorations = newLineState.hasPrecedingBlockDecorations

oldLineState.hasFollowingBlockDecorations = newLineState.hasFollowingBlockDecorations

lineNodeForScreenRow: (screenRow) ->

@lineNodesByLineId[@lineIdsByScreenRow[screenRow]]

lineNodeForLineId: (lineId) ->

@lineNodesByLineId[lineId]

textNodesForLineId: (lineId) ->

@textNodesByLineId[lineId].slice()

lineIdForScreenRow: (screenRow) ->

@lineIdsByScreenRow[screenRow]

textNodesForScreenRow: (screenRow) ->

@textNodesByLineId[@lineIdsByScreenRow[screenRow]]?.slice()

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

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