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338 lines
10 KiB
CoffeeScript
338 lines
10 KiB
CoffeeScript
Range = require 'range'
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Anchor = require 'anchor'
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EventEmitter = require 'event-emitter'
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_ = require 'underscore'
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module.exports =
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class Selection
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anchor: null
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constructor: ({@cursor, @editSession}) ->
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@cursor.selection = this
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@cursor.on 'change-screen-position.selection', (e) =>
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@trigger 'change-screen-range', @getScreenRange() unless e.bufferChanged
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@cursor.on 'destroy.selection', =>
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@cursor = null
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@destroy()
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destroy: ->
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if @cursor
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@cursor.off('.selection')
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@cursor.destroy()
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@anchor?.destroy()
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@editSession.removeSelection(this)
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@trigger 'destroy'
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isEmpty: ->
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@getBufferRange().isEmpty()
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isReversed: ->
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not @isEmpty() and @cursor.getBufferPosition().isLessThan(@anchor.getBufferPosition())
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isSingleScreenLine: ->
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@getScreenRange().isSingleLine()
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getScreenRange: ->
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if @anchor
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new Range(@anchor.getScreenPosition(), @cursor.getScreenPosition())
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else
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new Range(@cursor.getScreenPosition(), @cursor.getScreenPosition())
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setScreenRange: (screenRange, options={}) ->
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screenRange = Range.fromObject(screenRange)
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{ start, end } = screenRange
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[start, end] = [end, start] if options.reverse
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@modifyScreenRange =>
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@placeAnchor() unless @anchor
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@modifySelection =>
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@anchor.setScreenPosition(start)
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@cursor.setScreenPosition(end)
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setBufferRange: (bufferRange, options={}) ->
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bufferRange = Range.fromObject(bufferRange)
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{ start, end } = bufferRange
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[start, end] = [end, start] if options.reverse
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@modifyScreenRange =>
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@editSession.destroyFoldsIntersectingBufferRange(bufferRange) unless options.preserveFolds
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@placeAnchor() unless @anchor
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@modifySelection =>
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@anchor.setBufferPosition(start, options)
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@cursor.setBufferPosition(end, options)
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getBufferRange: ->
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if @anchor
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new Range(@anchor.getBufferPosition(), @cursor.getBufferPosition())
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else
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new Range(@cursor.getBufferPosition(), @cursor.getBufferPosition())
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getText: ->
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@editSession.buffer.getTextInRange(@getBufferRange())
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clear: ->
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@modifyScreenRange =>
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@anchor?.destroy()
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@anchor = null
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selectWord: ->
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@setBufferRange(@cursor.getCurrentWordBufferRange())
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expandOverWord: ->
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@setBufferRange(@getBufferRange().union(@cursor.getCurrentWordBufferRange()))
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selectLine: (row=@cursor.getBufferPosition().row) ->
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startPosition = [row, 0]
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if @editSession.getLastBufferRow() == row
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endPosition = [row, Infinity]
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else
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endPosition = [row+1, 0]
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@setBufferRange [startPosition, endPosition]
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expandOverLine: ->
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@setBufferRange(@getBufferRange().union(@cursor.getCurrentLineBufferRange()))
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selectToScreenPosition: (position) ->
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@modifySelection => @cursor.setScreenPosition(position)
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selectToBufferPosition: (position) ->
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@modifySelection => @cursor.setBufferPosition(position)
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selectRight: ->
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@modifySelection => @cursor.moveRight()
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selectLeft: ->
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@modifySelection => @cursor.moveLeft()
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selectUp: ->
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@modifySelection => @cursor.moveUp()
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selectDown: ->
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@modifySelection => @cursor.moveDown()
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selectToTop: ->
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@modifySelection => @cursor.moveToTop()
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selectToBottom: ->
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@modifySelection => @cursor.moveToBottom()
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selectAll: ->
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@setBufferRange(@editSession.buffer.getRange())
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selectToBeginningOfLine: ->
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@modifySelection => @cursor.moveToBeginningOfLine()
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selectToEndOfLine: ->
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@modifySelection => @cursor.moveToEndOfLine()
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selectToBeginningOfWord: ->
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@modifySelection => @cursor.moveToBeginningOfWord()
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selectToEndOfWord: ->
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@modifySelection => @cursor.moveToEndOfWord()
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insertText: (text, options={}) ->
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oldBufferRange = @getBufferRange()
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@editSession.destroyFoldsContainingBufferRow(oldBufferRange.end.row)
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wasReversed = @isReversed()
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text = @normalizeIndent(text, options) if options.normalizeIndent
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@clear()
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newBufferRange = @editSession.buffer.change(oldBufferRange, text)
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@cursor.setBufferPosition(newBufferRange.end, skipAtomicTokens: true) if wasReversed
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if @editSession.autoIndent and options.autoIndent
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if text == '\n'
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@editSession.autoIndentBufferRow(newBufferRange.end.row)
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else
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@editSession.autoDecreaseIndentForRow(newBufferRange.start.row)
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indent: ->
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{ row, column } = @cursor.getBufferPosition()
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if @isEmpty()
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desiredIndent = @editSession.suggestedIndentForBufferRow(row)
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delta = desiredIndent - column
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if @editSession.autoIndent and delta > 0
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@insertText(new Array(delta + 1).join(' '))
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else
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if @editSession.softTabs
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@insertText(@editSession.getTabText())
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else
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@insertText('\t')
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else
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@indentSelectedRows()
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normalizeIndent: (text, options) ->
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return text unless /\n/.test(text)
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currentBufferRow = @cursor.getBufferRow()
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currentBufferColumn = @cursor.getBufferColumn()
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lines = text.split('\n')
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currentBasis = options.indentBasis ? lines[0].match(/\s*/)[0].length
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lines[0] = lines[0].replace(/^\s*/, '') # strip leading space from first line
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normalizedLines = []
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textPrecedingCursor = @editSession.buffer.getTextInRange([[currentBufferRow, 0], [currentBufferRow, currentBufferColumn]])
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insideExistingLine = textPrecedingCursor.match(/\S/)
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if insideExistingLine
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desiredBasis = @editSession.indentationForBufferRow(currentBufferRow)
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else if @editSession.autoIndent
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desiredBasis = @editSession.suggestedIndentForBufferRow(currentBufferRow)
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else
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desiredBasis = currentBufferColumn
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for line, i in lines
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if i == 0
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if insideExistingLine
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delta = 0
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else
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delta = desiredBasis - currentBufferColumn
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else
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delta = desiredBasis - currentBasis
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normalizedLines.push(@adjustIndentationForLine(line, delta))
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normalizedLines.join('\n')
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adjustIndentationForLine: (line, delta) ->
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if delta > 0
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new Array(delta + 1).join(' ') + line
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else if delta < 0
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line.replace(new RegExp("^ {0,#{Math.abs(delta)}}"), '')
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else
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line
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backspace: ->
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if @isEmpty() and not @editSession.isFoldedAtScreenRow(@cursor.getScreenRow())
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if @cursor.isAtBeginningOfLine() and @editSession.isFoldedAtScreenRow(@cursor.getScreenRow() - 1)
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@selectToBufferPosition([@cursor.getBufferRow() - 1, Infinity])
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else
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@selectLeft()
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@deleteSelectedText()
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backspaceToBeginningOfWord: ->
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@selectToBeginningOfWord() if @isEmpty()
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@deleteSelectedText()
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delete: ->
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if @isEmpty()
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if @cursor.isAtEndOfLine() and fold = @editSession.largestFoldStartingAtScreenRow(@cursor.getScreenRow() + 1)
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@selectToBufferPosition(fold.getBufferRange().end)
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else
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@selectRight()
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@deleteSelectedText()
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deleteToEndOfWord: ->
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@selectToEndOfWord() if @isEmpty()
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@deleteSelectedText()
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deleteSelectedText: ->
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bufferRange = @getBufferRange()
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if fold = @editSession.largestFoldContainingBufferRow(bufferRange.end.row)
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includeNewline = bufferRange.start.column == 0 or bufferRange.start.row >= fold.startRow
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bufferRange = bufferRange.union(fold.getBufferRange({ includeNewline }))
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@modifyScreenRange =>
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@editSession.buffer.delete(bufferRange) unless bufferRange.isEmpty()
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@cursor?.setBufferPosition(bufferRange.start)
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deleteLine: ->
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if @isEmpty()
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start = @cursor.getScreenRow()
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range = @editSession.bufferRowsForScreenRows(start, start + 1)
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if range[1]
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@editSession.buffer.deleteRows(range[0], range[1] - 1)
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else
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@editSession.buffer.deleteRow(range[0])
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else
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range = @getBufferRange()
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start = range.start.row
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end = range.end.row
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if end isnt @editSession.buffer.getLastRow() and range.end.column is 0
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end--
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@editSession.buffer.deleteRows(start, end)
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indentSelectedRows: ->
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range = @getBufferRange()
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for row in [range.start.row..range.end.row]
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@editSession.buffer.insert([row, 0], @editSession.getTabText()) unless @editSession.buffer.lineLengthForRow(row) == 0
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outdentSelectedRows: ->
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range = @getBufferRange()
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buffer = @editSession.buffer
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leadingTabRegex = new RegExp("^ {1,#{@editSession.getTabLength()}}|\t")
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for row in [range.start.row..range.end.row]
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if matchLength = buffer.lineForRow(row).match(leadingTabRegex)?[0].length
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buffer.delete [[row, 0], [row, matchLength]]
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toggleLineComments: ->
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@modifySelection =>
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@editSession.toggleLineCommentsInRange(@getBufferRange())
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cutToEndOfLine: (maintainPasteboard) ->
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@selectToEndOfLine() if @isEmpty()
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@cut(maintainPasteboard)
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cut: (maintainPasteboard=false) ->
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@copy(maintainPasteboard)
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@delete()
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copy: (maintainPasteboard=false) ->
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return if @isEmpty()
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text = @editSession.buffer.getTextInRange(@getBufferRange())
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if maintainPasteboard
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[currentText, metadata] = pasteboard.read()
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text = currentText + '\n' + text
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else
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metadata = { indentBasis: @editSession.indentationForBufferRow(@getBufferRange().start.row) }
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pasteboard.write(text, metadata)
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fold: ->
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range = @getBufferRange()
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@editSession.createFold(range.start.row, range.end.row)
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@cursor.setBufferPosition([range.end.row + 1, 0])
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autoIndentText: (text) ->
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@editSession.autoIndentTextAfterBufferPosition(text, @cursor.getBufferPosition())
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autoOutdent: ->
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@editSession.autoOutdentBufferRow(@cursor.getBufferRow())
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modifySelection: (fn) ->
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@retainSelection = true
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@view?.retainSelection = true
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@placeAnchor() unless @anchor
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fn()
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@retainSelection = false
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@view?.retainSelection = false
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modifyScreenRange: (fn) ->
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oldScreenRange = @getScreenRange()
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fn()
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if @cursor
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newScreenRange = @getScreenRange()
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@trigger 'change-screen-range', newScreenRange unless oldScreenRange.isEqual(newScreenRange)
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placeAnchor: ->
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@anchor = @editSession.addAnchor(strong: true)
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@anchor.setScreenPosition(@cursor.getScreenPosition())
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@anchor.on 'change-screen-position.selection', => @trigger 'change-screen-range'
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intersectsBufferRange: (bufferRange) ->
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@getBufferRange().intersectsWith(bufferRange)
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intersectsWith: (otherSelection) ->
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@getScreenRange().intersectsWith(otherSelection.getScreenRange())
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merge: (otherSelection, options) ->
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@setScreenRange(@getScreenRange().union(otherSelection.getScreenRange()), options)
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otherSelection.destroy()
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_.extend Selection.prototype, EventEmitter
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