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text-editor-presenter.coffee
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{CompositeDisposable, Emitter} = require 'event-kit'
{Point, Range} = require 'text-buffer'
_ = require 'underscore-plus'
Decoration = require './decoration'
module.exports =
class TextEditorPresenter
toggleCursorBlinkHandle: null
startBlinkingCursorsAfterDelay: null
stoppedScrollingTimeoutId: null
mouseWheelScreenRow: null
overlayDimensions: {}
minimumReflowInterval: 200
constructor: (params) ->
{@model, @lineTopIndex} = params
@model.presenter = this
{@cursorBlinkPeriod, @cursorBlinkResumeDelay, @stoppedScrollingDelay, @tileSize, @autoHeight} = params
{@contentFrameWidth} = params
{@displayLayer} = @model
@gutterWidth = 0
@tileSize ?= 6
@realScrollTop = @scrollTop
@realScrollLeft = @scrollLeft
@disposables = new CompositeDisposable
@emitter = new Emitter
@linesByScreenRow = new Map
@visibleHighlights = {}
@characterWidthsByScope = {}
@lineDecorationsByScreenRow = {}
@lineNumberDecorationsByScreenRow = {}
@customGutterDecorationsByGutterName = {}
@observedBlockDecorations = new Set()
@invalidatedDimensionsByBlockDecoration = new Set()
@invalidateAllBlockDecorationsDimensions = false
@screenRowsToMeasure = []
@transferMeasurementsToModel()
@transferMeasurementsFromModel()
@observeModel()
@buildState()
@invalidateState()
@startBlinkingCursors() if @focused
@startReflowing() if @continuousReflow
@updating = false
setLinesYardstick: (@linesYardstick) ->
getLinesYardstick: -> @linesYardstick
destroy: ->
@disposables.dispose()
clearTimeout(@stoppedScrollingTimeoutId) if @stoppedScrollingTimeoutId?
clearInterval(@reflowingInterval) if @reflowingInterval?
@stopBlinkingCursors()
# Calls your `callback` when some changes in the model occurred and the current state has been updated.
onDidUpdateState: (callback) ->
@emitter.on 'did-update-state', callback
emitDidUpdateState: ->
@emitter.emit "did-update-state" if @isBatching()
transferMeasurementsToModel: ->
@model.setLineHeightInPixels(@lineHeight) if @lineHeight?
@model.setDefaultCharWidth(@baseCharacterWidth) if @baseCharacterWidth?
transferMeasurementsFromModel: ->
@editorWidthInChars = @model.getEditorWidthInChars()
# Private: Determines whether {TextEditorPresenter} is currently batching changes.
# Returns a {Boolean}, `true` if is collecting changes, `false` if is applying them.
isBatching: ->
@updating is false
getPreMeasurementState: ->
@updating = true
@updateVerticalDimensions()
@updateScrollbarDimensions()
@commitPendingLogicalScrollTopPosition()
@commitPendingScrollTopPosition()
@updateStartRow()
@updateEndRow()
@updateCommonGutterState()
@updateReflowState()
@updateLines()
if @shouldUpdateDecorations
@fetchDecorations()
@updateLineDecorations()
@updateBlockDecorations()
@updateTilesState()
@updating = false
@state
getPostMeasurementState: ->
@updating = true
@updateHorizontalDimensions()
@commitPendingLogicalScrollLeftPosition()
@commitPendingScrollLeftPosition()
@clearPendingScrollPosition()
@updateRowsPerPage()
@updateLines()
@updateVerticalScrollState()
@updateHorizontalScrollState()
@updateScrollbarsState()
@updateHiddenInputState()
@updateContentState()
@updateFocusedState()
@updateHeightState()
@updateWidthState()
@updateHighlightDecorations() if @shouldUpdateDecorations
@updateTilesState()
@updateCursorsState()
@updateOverlaysState()
@updateLineNumberGutterState()
@updateGutterOrderState()
@updateCustomGutterDecorationState()
@updating = false
@resetTrackedUpdates()
@state
resetTrackedUpdates: ->
@shouldUpdateDecorations = false
invalidateState: ->
@shouldUpdateDecorations = true
observeModel: ->
@disposables.add @model.displayLayer.onDidChangeSync (changes) =>
for change in changes
startRow = change.start.row
endRow = startRow + change.oldExtent.row
@spliceBlockDecorationsInRange(startRow, endRow, change.newExtent.row - change.oldExtent.row)
@shouldUpdateDecorations = true
@emitDidUpdateState()
@disposables.add @model.onDidUpdateDecorations =>
@shouldUpdateDecorations = true
@emitDidUpdateState()
@disposables.add @model.onDidAddDecoration(@didAddBlockDecoration.bind(this))
for decoration in @model.getDecorations({type: 'block'})
this.didAddBlockDecoration(decoration)
@disposables.add @model.onDidChangeGrammar(@didChangeGrammar.bind(this))
@disposables.add @model.onDidChangePlaceholderText(@emitDidUpdateState.bind(this))
@disposables.add @model.onDidChangeMini =>
@shouldUpdateDecorations = true
@emitDidUpdateState()
@disposables.add @model.onDidChangeLineNumberGutterVisible(@emitDidUpdateState.bind(this))
@disposables.add @model.onDidAddCursor(@didAddCursor.bind(this))
@disposables.add @model.onDidRequestAutoscroll(@requestAutoscroll.bind(this))
@disposables.add @model.onDidChangeFirstVisibleScreenRow(@didChangeFirstVisibleScreenRow.bind(this))
@observeCursor(cursor) for cursor in @model.getCursors()
@disposables.add @model.onDidAddGutter(@didAddGutter.bind(this))
return
didChangeScrollPastEnd: ->
@updateScrollHeight()
@emitDidUpdateState()
didChangeShowLineNumbers: ->
@emitDidUpdateState()
didChangeGrammar: ->
@emitDidUpdateState()
buildState: ->
@state =
horizontalScrollbar: {}
verticalScrollbar: {}
hiddenInput: {}
content:
scrollingVertically: false
cursorsVisible: false
tiles: {}
highlights: {}
overlays: {}
cursors: {}
blockDecorations: {}
gutters: []
# Shared state that is copied into ``@state.gutters`.
@sharedGutterStyles = {}
@customGutterDecorations = {}
@lineNumberGutter =
tiles: {}
setContinuousReflow: (@continuousReflow) ->
if @continuousReflow
@startReflowing()
else
@stopReflowing()
updateReflowState: ->
@state.content.continuousReflow = @continuousReflow
@lineNumberGutter.continuousReflow = @continuousReflow
startReflowing: ->
@reflowingInterval = setInterval(@emitDidUpdateState.bind(this), @minimumReflowInterval)
stopReflowing: ->
clearInterval(@reflowingInterval)
@reflowingInterval = null
updateFocusedState: ->
@state.focused = @focused
updateHeightState: ->
if @autoHeight
@state.height = @contentHeight
else
@state.height = null
updateWidthState: ->
if @model.getAutoWidth()
@state.width = @state.content.width + @gutterWidth
else
@state.width = null
updateVerticalScrollState: ->
@state.content.scrollHeight = @scrollHeight
@sharedGutterStyles.scrollHeight = @scrollHeight
@state.verticalScrollbar.scrollHeight = @scrollHeight
@state.content.scrollTop = @scrollTop
@sharedGutterStyles.scrollTop = @scrollTop
@state.verticalScrollbar.scrollTop = @scrollTop
updateHorizontalScrollState: ->
@state.content.scrollWidth = @scrollWidth
@state.horizontalScrollbar.scrollWidth = @scrollWidth
@state.content.scrollLeft = @scrollLeft
@state.horizontalScrollbar.scrollLeft = @scrollLeft
updateScrollbarsState: ->
@state.horizontalScrollbar.visible = @horizontalScrollbarHeight > 0
@state.horizontalScrollbar.height = @measuredHorizontalScrollbarHeight
@state.horizontalScrollbar.right = @verticalScrollbarWidth
@state.verticalScrollbar.visible = @verticalScrollbarWidth > 0
@state.verticalScrollbar.width = @measuredVerticalScrollbarWidth
@state.verticalScrollbar.bottom = @horizontalScrollbarHeight
updateHiddenInputState: ->
return unless lastCursor = @model.getLastCursor()
{top, left, height, width} = @pixelRectForScreenRange(lastCursor.getScreenRange())
if @focused
@state.hiddenInput.top = Math.max(Math.min(top, @clientHeight - height), 0)
@state.hiddenInput.left = Math.max(Math.min(left, @clientWidth - width), 0)
else
@state.hiddenInput.top = 0
@state.hiddenInput.left = 0
@state.hiddenInput.height = height
@state.hiddenInput.width = Math.max(width, 2)
updateContentState: ->
if @boundingClientRect?
@sharedGutterStyles.maxHeight = @boundingClientRect.height
@state.content.maxHeight = @boundingClientRect.height
verticalScrollbarWidth = @verticalScrollbarWidth ? 0
contentFrameWidth = @contentFrameWidth ? 0
contentWidth = @contentWidth ? 0
if @model.getAutoWidth()
@state.content.width = contentWidth + verticalScrollbarWidth
else
@state.content.width = Math.max(contentWidth + verticalScrollbarWidth, contentFrameWidth)
@state.content.scrollWidth = @scrollWidth
@state.content.scrollLeft = @scrollLeft
@state.content.backgroundColor = if @model.isMini() then null else @backgroundColor
@state.content.placeholderText = if @model.isEmpty() then @model.getPlaceholderText() else null
tileForRow: (row) ->
row - (row % @tileSize)
constrainRow: (row) ->
Math.max(0, Math.min(row, @model.getScreenLineCount()))
getStartTileRow: ->
@constrainRow(@tileForRow(@startRow ? 0))
getEndTileRow: ->
@constrainRow(@tileForRow(@endRow ? 0))
isValidScreenRow: (screenRow) ->
screenRow >= 0 and screenRow < @model.getScreenLineCount()
getScreenRowsToRender: ->
startRow = @getStartTileRow()
endRow = @constrainRow(@getEndTileRow() + @tileSize)
screenRows = [startRow...endRow]
longestScreenRow = @model.getLongestScreenRow()
if longestScreenRow?
screenRows.push(longestScreenRow)
if @screenRowsToMeasure?
screenRows.push(@screenRowsToMeasure...)
screenRows = screenRows.filter @isValidScreenRow.bind(this)
screenRows.sort (a, b) -> a - b
_.uniq(screenRows, true)
getScreenRangesToRender: ->
screenRows = @getScreenRowsToRender()
screenRows.push(Infinity) # makes the loop below inclusive
startRow = screenRows[0]
endRow = startRow - 1
screenRanges = []
for row in screenRows
if row is endRow + 1
endRow++
else
screenRanges.push([startRow, endRow])
startRow = endRow = row
screenRanges
setScreenRowsToMeasure: (screenRows) ->
return if not screenRows? or screenRows.length is 0
@screenRowsToMeasure = screenRows
@shouldUpdateDecorations = true
clearScreenRowsToMeasure: ->
@screenRowsToMeasure = []
updateTilesState: ->
return unless @startRow? and @endRow? and @lineHeight?
screenRows = @getScreenRowsToRender()
visibleTiles = {}
startRow = screenRows[0]
endRow = screenRows[screenRows.length - 1]
screenRowIndex = screenRows.length - 1
zIndex = 0
for tileStartRow in [@tileForRow(endRow)..@tileForRow(startRow)] by -@tileSize
tileEndRow = @constrainRow(tileStartRow + @tileSize)
rowsWithinTile = []
while screenRowIndex >= 0
currentScreenRow = screenRows[screenRowIndex]
break if currentScreenRow < tileStartRow
rowsWithinTile.push(currentScreenRow)
screenRowIndex--
continue if rowsWithinTile.length is 0
top = Math.round(@lineTopIndex.pixelPositionBeforeBlocksForRow(tileStartRow))
bottom = Math.round(@lineTopIndex.pixelPositionBeforeBlocksForRow(tileEndRow))
height = bottom - top
tile = @state.content.tiles[tileStartRow] ?= {}
tile.top = top - @scrollTop
tile.left = -@scrollLeft
tile.height = height
tile.display = "block"
tile.zIndex = zIndex
tile.highlights ?= {}
gutterTile = @lineNumberGutter.tiles[tileStartRow] ?= {}
gutterTile.top = top - @scrollTop
gutterTile.height = height
gutterTile.display = "block"
gutterTile.zIndex = zIndex
@updateLinesState(tile, rowsWithinTile)
@updateLineNumbersState(gutterTile, rowsWithinTile)
visibleTiles[tileStartRow] = true
zIndex++
if @mouseWheelScreenRow? and 0 <= @mouseWheelScreenRow < @model.getScreenLineCount()
mouseWheelTile = @tileForRow(@mouseWheelScreenRow)
unless visibleTiles[mouseWheelTile]?
@lineNumberGutter.tiles[mouseWheelTile].display = "none"
@state.content.tiles[mouseWheelTile].display = "none"
visibleTiles[mouseWheelTile] = true
for id, tile of @state.content.tiles
continue if visibleTiles.hasOwnProperty(id)
delete @state.content.tiles[id]
delete @lineNumberGutter.tiles[id]
updateLinesState: (tileState, screenRows) ->
tileState.lines ?= {}
visibleLineIds = {}
for screenRow in screenRows
line = @linesByScreenRow.get(screenRow)
unless line?
throw new Error("No line exists for row #{screenRow}. Last screen row: #{@model.getLastScreenRow()}")
visibleLineIds[line.id] = true
precedingBlockDecorations = @precedingBlockDecorationsByScreenRow[screenRow] ? []
followingBlockDecorations = @followingBlockDecorationsByScreenRow[screenRow] ? []
if tileState.lines.hasOwnProperty(line.id)
lineState = tileState.lines[line.id]
lineState.screenRow = screenRow
lineState.decorationClasses = @lineDecorationClassesForRow(screenRow)
lineState.precedingBlockDecorations = precedingBlockDecorations
lineState.followingBlockDecorations = followingBlockDecorations
lineState.hasPrecedingBlockDecorations = precedingBlockDecorations.length > 0
lineState.hasFollowingBlockDecorations = followingBlockDecorations.length > 0
else
tileState.lines[line.id] =
screenRow: screenRow
lineText: line.lineText
tagCodes: line.tagCodes
decorationClasses: @lineDecorationClassesForRow(screenRow)
precedingBlockDecorations: precedingBlockDecorations
followingBlockDecorations: followingBlockDecorations
hasPrecedingBlockDecorations: precedingBlockDecorations.length > 0
hasFollowingBlockDecorations: followingBlockDecorations.length > 0
for id, line of tileState.lines
delete tileState.lines[id] unless visibleLineIds.hasOwnProperty(id)
return
updateCursorsState: ->
return unless @startRow? and @endRow? and @hasPixelRectRequirements() and @baseCharacterWidth?
@state.content.cursors = {}
for cursor in @model.cursorsForScreenRowRange(@startRow, @endRow - 1) when cursor.isVisible()
pixelRect = @pixelRectForScreenRange(cursor.getScreenRange())
pixelRect.width = Math.round(@baseCharacterWidth) if pixelRect.width is 0
@state.content.cursors[cursor.id] = pixelRect
return
updateOverlaysState: ->
return unless @hasOverlayPositionRequirements()
visibleDecorationIds = {}
for decoration in @model.getOverlayDecorations()
continue unless decoration.getMarker().isValid()
{item, position, class: klass} = decoration.getProperties()
if position is 'tail'
screenPosition = decoration.getMarker().getTailScreenPosition()
else
screenPosition = decoration.getMarker().getHeadScreenPosition()
pixelPosition = @pixelPositionForScreenPosition(screenPosition)
# Fixed positioning.
top = @boundingClientRect.top + pixelPosition.top + @lineHeight
left = @boundingClientRect.left + pixelPosition.left + @gutterWidth
if overlayDimensions = @overlayDimensions[decoration.id]
{itemWidth, itemHeight, contentMargin} = overlayDimensions
rightDiff = left + itemWidth + contentMargin - @windowWidth
left -= rightDiff if rightDiff > 0
leftDiff = left + contentMargin
left -= leftDiff if leftDiff < 0
if top + itemHeight > @windowHeight and
top - (itemHeight + @lineHeight) >= 0
top -= itemHeight + @lineHeight
pixelPosition.top = top
pixelPosition.left = left
overlayState = @state.content.overlays[decoration.id] ?= {item}
overlayState.pixelPosition = pixelPosition
overlayState.class = klass if klass?
visibleDecorationIds[decoration.id] = true
for id of @state.content.overlays
delete @state.content.overlays[id] unless visibleDecorationIds[id]
for id of @overlayDimensions
delete @overlayDimensions[id] unless visibleDecorationIds[id]
return
updateLineNumberGutterState: ->
@lineNumberGutter.maxLineNumberDigits = @model.getLineCount().toString().length
updateCommonGutterState: ->
@sharedGutterStyles.backgroundColor = if @gutterBackgroundColor isnt "rgba(0, 0, 0, 0)"
@gutterBackgroundColor
else
@backgroundColor
didAddGutter: (gutter) ->
gutterDisposables = new CompositeDisposable
gutterDisposables.add gutter.onDidChangeVisible => @emitDidUpdateState()
gutterDisposables.add gutter.onDidDestroy =>
@disposables.remove(gutterDisposables)
gutterDisposables.dispose()
@emitDidUpdateState()
# It is not necessary to @updateCustomGutterDecorationState here.
# The destroyed gutter will be removed from the list of gutters in @state,
# and thus will be removed from the DOM.
@disposables.add(gutterDisposables)
@emitDidUpdateState()
updateGutterOrderState: ->
@state.gutters = []
if @model.isMini()
return
for gutter in @model.getGutters()
isVisible = @gutterIsVisible(gutter)
if gutter.name is 'line-number'
content = @lineNumberGutter
else
@customGutterDecorations[gutter.name] ?= {}
content = @customGutterDecorations[gutter.name]
@state.gutters.push({
gutter,
visible: isVisible,
styles: @sharedGutterStyles,
content,
})
# Updates the decoration state for the gutter with the given gutterName.
# @customGutterDecorations is an {Object}, with the form:
# * gutterName : {
# decoration.id : {
# top: # of pixels from top
# height: # of pixels height of this decoration
# item (optional): HTMLElement
# class (optional): {String} class
# }
# }
updateCustomGutterDecorationState: ->
return unless @startRow? and @endRow? and @lineHeight?
if @model.isMini()
# Mini editors have no gutter decorations.
# We clear instead of reassigning to preserve the reference.
@clearAllCustomGutterDecorations()
for gutter in @model.getGutters()
gutterName = gutter.name
gutterDecorations = @customGutterDecorations[gutterName]
if gutterDecorations
# Clear the gutter decorations; they are rebuilt.
# We clear instead of reassigning to preserve the reference.
@clearDecorationsForCustomGutterName(gutterName)
else
@customGutterDecorations[gutterName] = {}
continue unless @gutterIsVisible(gutter)
for decorationId, {properties, screenRange} of @customGutterDecorationsByGutterName[gutterName]
top = @lineTopIndex.pixelPositionAfterBlocksForRow(screenRange.start.row)
bottom = @lineTopIndex.pixelPositionBeforeBlocksForRow(screenRange.end.row + 1)
@customGutterDecorations[gutterName][decorationId] =
top: top
height: bottom - top
item: properties.item
class: properties.class
clearAllCustomGutterDecorations: ->
allGutterNames = Object.keys(@customGutterDecorations)
for gutterName in allGutterNames
@clearDecorationsForCustomGutterName(gutterName)
clearDecorationsForCustomGutterName: (gutterName) ->
gutterDecorations = @customGutterDecorations[gutterName]
if gutterDecorations
allDecorationIds = Object.keys(gutterDecorations)
for decorationId in allDecorationIds
delete gutterDecorations[decorationId]
gutterIsVisible: (gutterModel) ->
isVisible = gutterModel.isVisible()
if gutterModel.name is 'line-number'
isVisible = isVisible and @model.doesShowLineNumbers()
isVisible
updateLineNumbersState: (tileState, screenRows) ->
tileState.lineNumbers ?= {}
visibleLineNumberIds = {}
for screenRow in screenRows when @isRowRendered(screenRow)
lineId = @linesByScreenRow.get(screenRow).id
{bufferRow, softWrappedAtStart: softWrapped} = @displayLayer.softWrapDescriptorForScreenRow(screenRow)
foldable = not softWrapped and @model.isFoldableAtBufferRow(bufferRow)
decorationClasses = @lineNumberDecorationClassesForRow(screenRow)
blockDecorationsBeforeCurrentScreenRowHeight = @lineTopIndex.pixelPositionAfterBlocksForRow(screenRow) - @lineTopIndex.pixelPositionBeforeBlocksForRow(screenRow)
blockDecorationsHeight = blockDecorationsBeforeCurrentScreenRowHeight
if screenRow % @tileSize isnt 0
blockDecorationsAfterPreviousScreenRowHeight = @lineTopIndex.pixelPositionBeforeBlocksForRow(screenRow) - @lineHeight - @lineTopIndex.pixelPositionAfterBlocksForRow(screenRow - 1)
blockDecorationsHeight += blockDecorationsAfterPreviousScreenRowHeight
tileState.lineNumbers[lineId] = {screenRow, bufferRow, softWrapped, decorationClasses, foldable, blockDecorationsHeight}
visibleLineNumberIds[lineId] = true
for id of tileState.lineNumbers
delete tileState.lineNumbers[id] unless visibleLineNumberIds[id]
return
updateStartRow: ->
return unless @scrollTop? and @lineHeight?
@startRow = Math.max(0, @lineTopIndex.rowForPixelPosition(@scrollTop))
updateEndRow: ->
return unless @scrollTop? and @lineHeight? and @height?
@endRow = Math.min(
@model.getScreenLineCount(),
@lineTopIndex.rowForPixelPosition(@scrollTop + @height + @lineHeight - 1) + 1
)
updateRowsPerPage: ->
rowsPerPage = Math.floor(@getClientHeight() / @lineHeight)
if rowsPerPage isnt @rowsPerPage
@rowsPerPage = rowsPerPage
@model.setRowsPerPage(@rowsPerPage)
updateScrollWidth: ->
return unless @contentWidth? and @clientWidth?
scrollWidth = Math.max(@contentWidth, @clientWidth)
unless @scrollWidth is scrollWidth
@scrollWidth = scrollWidth
@updateScrollLeft(@scrollLeft)
updateScrollHeight: ->
return unless @contentHeight? and @clientHeight?
contentHeight = @contentHeight
if @model.getScrollPastEnd()
extraScrollHeight = @clientHeight - (@lineHeight * 3)
contentHeight += extraScrollHeight if extraScrollHeight > 0
scrollHeight = Math.max(contentHeight, @height)
unless @scrollHeight is scrollHeight
@scrollHeight = scrollHeight
@updateScrollTop(@scrollTop)
updateVerticalDimensions: ->
if @lineHeight?
oldContentHeight = @contentHeight
@contentHeight = Math.round(@lineTopIndex.pixelPositionAfterBlocksForRow(@model.getScreenLineCount()))
if @contentHeight isnt oldContentHeight
@updateHeight()
@updateScrollbarDimensions()
@updateScrollHeight()
updateHorizontalDimensions: ->
if @baseCharacterWidth?
oldContentWidth = @contentWidth
rightmostPosition = @model.getRightmostScreenPosition()
@contentWidth = @pixelPositionForScreenPosition(rightmostPosition).left
@contentWidth += @scrollLeft
@contentWidth += 1 unless @model.isSoftWrapped() # account for cursor width
if @contentWidth isnt oldContentWidth
@updateScrollbarDimensions()
@updateClientWidth()
@updateScrollWidth()
updateClientHeight: ->
return unless @height? and @horizontalScrollbarHeight?
clientHeight = @height - @horizontalScrollbarHeight
@model.setHeight(clientHeight, true)
unless @clientHeight is clientHeight
@clientHeight = clientHeight
@updateScrollHeight()
@updateScrollTop(@scrollTop)
updateClientWidth: ->
return unless @contentFrameWidth? and @verticalScrollbarWidth?
if @model.getAutoWidth()
clientWidth = @contentWidth
else
clientWidth = @contentFrameWidth - @verticalScrollbarWidth
@model.setWidth(clientWidth, true) unless @editorWidthInChars
unless @clientWidth is clientWidth
@clientWidth = clientWidth
@updateScrollWidth()
@updateScrollLeft(@scrollLeft)
updateScrollTop: (scrollTop) ->
scrollTop = @constrainScrollTop(scrollTop)
if scrollTop isnt @realScrollTop and not Number.isNaN(scrollTop)
@realScrollTop = scrollTop
@scrollTop = Math.round(scrollTop)
@model.setFirstVisibleScreenRow(Math.round(@scrollTop / @lineHeight), true)
@updateStartRow()
@updateEndRow()
@didStartScrolling()
@emitter.emit 'did-change-scroll-top', @scrollTop
constrainScrollTop: (scrollTop) ->
return scrollTop unless scrollTop? and @scrollHeight? and @clientHeight?
Math.max(0, Math.min(scrollTop, @scrollHeight - @clientHeight))
updateScrollLeft: (scrollLeft) ->
scrollLeft = @constrainScrollLeft(scrollLeft)
if scrollLeft isnt @realScrollLeft and not Number.isNaN(scrollLeft)
@realScrollLeft = scrollLeft
@scrollLeft = Math.round(scrollLeft)
@model.setFirstVisibleScreenColumn(Math.round(@scrollLeft / @baseCharacterWidth))
@emitter.emit 'did-change-scroll-left', @scrollLeft
constrainScrollLeft: (scrollLeft) ->
return scrollLeft unless scrollLeft? and @scrollWidth? and @clientWidth?
Math.max(0, Math.min(scrollLeft, @scrollWidth - @clientWidth))
updateScrollbarDimensions: ->
return unless @contentFrameWidth? and @height?
return unless @measuredVerticalScrollbarWidth? and @measuredHorizontalScrollbarHeight?
return unless @contentWidth? and @contentHeight?
if @model.getAutoWidth()
clientWidthWithVerticalScrollbar = @contentWidth + @measuredVerticalScrollbarWidth
else
clientWidthWithVerticalScrollbar = @contentFrameWidth
clientWidthWithoutVerticalScrollbar = clientWidthWithVerticalScrollbar - @measuredVerticalScrollbarWidth
clientHeightWithHorizontalScrollbar = @height
clientHeightWithoutHorizontalScrollbar = clientHeightWithHorizontalScrollbar - @measuredHorizontalScrollbarHeight
horizontalScrollbarVisible =
not @model.isMini() and
(@contentWidth > clientWidthWithVerticalScrollbar or
@contentWidth > clientWidthWithoutVerticalScrollbar and @contentHeight > clientHeightWithHorizontalScrollbar)
verticalScrollbarVisible =
not @model.isMini() and
(@contentHeight > clientHeightWithHorizontalScrollbar or
@contentHeight > clientHeightWithoutHorizontalScrollbar and @contentWidth > clientWidthWithVerticalScrollbar)
horizontalScrollbarHeight =
if horizontalScrollbarVisible
@measuredHorizontalScrollbarHeight
else
0
verticalScrollbarWidth =
if verticalScrollbarVisible
@measuredVerticalScrollbarWidth
else
0
unless @horizontalScrollbarHeight is horizontalScrollbarHeight
@horizontalScrollbarHeight = horizontalScrollbarHeight
@updateClientHeight()
unless @verticalScrollbarWidth is verticalScrollbarWidth
@verticalScrollbarWidth = verticalScrollbarWidth
@updateClientWidth()
lineDecorationClassesForRow: (row) ->
return null if @model.isMini()
decorationClasses = null
for id, properties of @lineDecorationsByScreenRow[row]
decorationClasses ?= []
decorationClasses.push(properties.class)
decorationClasses
lineNumberDecorationClassesForRow: (row) ->
return null if @model.isMini()
decorationClasses = null
for id, properties of @lineNumberDecorationsByScreenRow[row]
decorationClasses ?= []
decorationClasses.push(properties.class)
decorationClasses
getCursorBlinkPeriod: -> @cursorBlinkPeriod
getCursorBlinkResumeDelay: -> @cursorBlinkResumeDelay
setFocused: (focused) ->
unless @focused is focused
@focused = focused
if @focused
@startBlinkingCursors()
else
@stopBlinkingCursors(false)
@emitDidUpdateState()
setScrollTop: (scrollTop) ->
return unless scrollTop?
@pendingScrollLogicalPosition = null
@pendingScrollTop = scrollTop
@shouldUpdateDecorations = true
@emitDidUpdateState()
getScrollTop: ->
@scrollTop
getRealScrollTop: ->
@realScrollTop ? @scrollTop
didStartScrolling: ->
if @stoppedScrollingTimeoutId?
clearTimeout(@stoppedScrollingTimeoutId)
@stoppedScrollingTimeoutId = null
@stoppedScrollingTimeoutId = setTimeout(@didStopScrolling.bind(this), @stoppedScrollingDelay)
didStopScrolling: ->
if @mouseWheelScreenRow?
@mouseWheelScreenRow = null
@shouldUpdateDecorations = true
@emitDidUpdateState()
setScrollLeft: (scrollLeft) ->
return unless scrollLeft?
@pendingScrollLogicalPosition = null
@pendingScrollLeft = scrollLeft
@emitDidUpdateState()
getScrollLeft: ->
@scrollLeft
getRealScrollLeft: ->
@realScrollLeft ? @scrollLeft
getClientHeight: ->
if @clientHeight
@clientHeight
else
@explicitHeight - @horizontalScrollbarHeight
getClientWidth: ->
if @clientWidth
@clientWidth
else
@contentFrameWidth - @verticalScrollbarWidth
getScrollBottom: -> @getScrollTop() + @getClientHeight()
setScrollBottom: (scrollBottom) ->
@setScrollTop(scrollBottom - @getClientHeight())
@getScrollBottom()
getScrollRight: -> @getScrollLeft() + @getClientWidth()
setScrollRight: (scrollRight) ->
@setScrollLeft(scrollRight - @getClientWidth())
@getScrollRight()
getScrollHeight: ->
@scrollHeight
getScrollWidth: ->
@scrollWidth
getMaxScrollTop: ->
scrollHeight = @getScrollHeight()
clientHeight = @getClientHeight()
return 0 unless scrollHeight? and clientHeight?
scrollHeight - clientHeight
setHorizontalScrollbarHeight: (horizontalScrollbarHeight) ->
unless @measuredHorizontalScrollbarHeight is horizontalScrollbarHeight
@measuredHorizontalScrollbarHeight = horizontalScrollbarHeight
@emitDidUpdateState()
setVerticalScrollbarWidth: (verticalScrollbarWidth) ->
unless @measuredVerticalScrollbarWidth is verticalScrollbarWidth
@measuredVerticalScrollbarWidth = verticalScrollbarWidth
@emitDidUpdateState()
setAutoHeight: (autoHeight) ->
unless @autoHeight is autoHeight
@autoHeight = autoHeight
@emitDidUpdateState()
setExplicitHeight: (explicitHeight) ->
unless @explicitHeight is explicitHeight
@explicitHeight = explicitHeight
@updateHeight()
@shouldUpdateDecorations = true
@emitDidUpdateState()
updateHeight: ->
height = @explicitHeight ? @contentHeight
unless @height is height
@height = height
@updateScrollbarDimensions()
@updateClientHeight()
@updateScrollHeight()
@updateEndRow()
didChangeAutoWidth: ->
@emitDidUpdateState()
setContentFrameWidth: (contentFrameWidth) ->
if @contentFrameWidth isnt contentFrameWidth or @editorWidthInChars?
@contentFrameWidth = contentFrameWidth
@editorWidthInChars = null
@updateScrollbarDimensions()
@updateClientWidth()
@invalidateAllBlockDecorationsDimensions = true
@shouldUpdateDecorations = true
@emitDidUpdateState()
setBoundingClientRect: (boundingClientRect) ->
unless @clientRectsEqual(@boundingClientRect, boundingClientRect)
@boundingClientRect = boundingClientRect
@invalidateAllBlockDecorationsDimensions = true
@shouldUpdateDecorations = true
@emitDidUpdateState()
clientRectsEqual: (clientRectA, clientRectB) ->
clientRectA? and clientRectB? and
clientRectA.top is clientRectB.top and
clientRectA.left is clientRectB.left and
clientRectA.width is clientRectB.width and
clientRectA.height is clientRectB.height
setWindowSize: (width, height) ->
if @windowWidth isnt width or @windowHeight isnt height
@windowWidth = width
@windowHeight = height
@invalidateAllBlockDecorationsDimensions = true
@shouldUpdateDecorations = true
@emitDidUpdateState()
setBackgroundColor: (backgroundColor) ->
unless @backgroundColor is backgroundColor
@backgroundColor = backgroundColor
@emitDidUpdateState()
setGutterBackgroundColor: (gutterBackgroundColor) ->
unless @gutterBackgroundColor is gutterBackgroundColor
@gutterBackgroundColor = gutterBackgroundColor
@emitDidUpdateState()
setGutterWidth: (gutterWidth) ->
if @gutterWidth isnt gutterWidth
@gutterWidth = gutterWidth
@updateOverlaysState()
getGutterWidth: ->
@gutterWidth
setLineHeight: (lineHeight) ->
unless @lineHeight is lineHeight
@lineHeight = lineHeight
@model.setLineHeightInPixels(@lineHeight)
@lineTopIndex.setDefaultLineHeight(@lineHeight)
@restoreScrollTopIfNeeded()
@model.setLineHeightInPixels(lineHeight)
@shouldUpdateDecorations = true
@emitDidUpdateState()
setMouseWheelScreenRow: (screenRow) ->
if @mouseWheelScreenRow isnt screenRow
@mouseWheelScreenRow = screenRow
@didStartScrolling()
setBaseCharacterWidth: (baseCharacterWidth, doubleWidthCharWidth, halfWidthCharWidth, koreanCharWidth) ->
unless @baseCharacterWidth is baseCharacterWidth and @doubleWidthCharWidth is doubleWidthCharWidth and @halfWidthCharWidth is halfWidthCharWidth and koreanCharWidth is @koreanCharWidth
@baseCharacterWidth = baseCharacterWidth
@doubleWidthCharWidth = doubleWidthCharWidth
@halfWidthCharWidth = halfWidthCharWidth
@koreanCharWidth = koreanCharWidth
@model.setDefaultCharWidth(baseCharacterWidth, doubleWidthCharWidth, halfWidthCharWidth, koreanCharWidth)
@restoreScrollLeftIfNeeded()
@measurementsChanged()
measurementsChanged: ->
@invalidateAllBlockDecorationsDimensions = true
@shouldUpdateDecorations = true
@emitDidUpdateState()