mirror of
https://github.com/pulsar-edit/pulsar.git
synced 2024-11-11 04:48:44 +03:00
216 lines
9.6 KiB
CoffeeScript
216 lines
9.6 KiB
CoffeeScript
LineMap = require 'line-map'
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ScreenLine = require 'screen-line'
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Buffer = require 'buffer'
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TokenizedBuffer = require 'tokenized-buffer'
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Point = require 'point'
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describe "LineMap", ->
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[tokenizedBuffer, map] = []
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[line0, line1, line2, line3, line4] = []
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beforeEach ->
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buffer = new Buffer(require.resolve 'fixtures/sample.js')
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tokenizedBuffer = new TokenizedBuffer(buffer)
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map = new LineMap
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[line0, line1, line2, line3, line4] = tokenizedBuffer.linesForScreenRows(0, 4)
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afterEach ->
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tokenizedBuffer.buffer.destroy()
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describe ".insertAtBufferRow(row, lineFragments)", ->
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it "inserts the given line fragments before the specified buffer row", ->
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map.insertAtBufferRow(0, [line2, line3])
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map.insertAtBufferRow(0, [line0, line1])
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map.insertAtBufferRow(4, [line4])
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line1
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expect(map.lineForScreenRow(2)).toEqual line2
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expect(map.lineForScreenRow(3)).toEqual line3
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expect(map.lineForScreenRow(4)).toEqual line4
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it "allows for partial line fragments on the row following the insertion", ->
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[line0a, line0b] = line0.splitAt(10)
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map.insertAtBufferRow(0, [line0a, line0b])
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map.insertAtBufferRow(0, [line1])
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expect(map.lineForScreenRow(0)).toEqual line1
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expect(map.lineForScreenRow(1)).toEqual line0a.concat(line0b)
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describe ".spliceAtBufferRow(bufferRow, rowCount, lineFragments)", ->
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describe "when called with a row count of 0", ->
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it "inserts the given line fragments before the specified buffer row", ->
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map.insertAtBufferRow(0, [line0, line1])
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map.spliceAtBufferRow(1, 0, [line3, line4])
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line1
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map.spliceAtBufferRow(0, 0, [line2])
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expect(map.lineForScreenRow(0)).toEqual line2
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describe "when called with a row count of 1", ->
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describe "when the specified buffer row is spanned by a single line fragment", ->
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it "replaces the spanning line fragment with the given line fragments", ->
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map.insertAtBufferRow(0, [line0, line1, line2])
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map.spliceAtBufferRow(1, 1, [line3, line4])
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expect(map.bufferLineCount()).toBe 4
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line2
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map.spliceAtBufferRow(2, 1, [line0])
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expect(map.lineForScreenRow(2)).toEqual line0
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expect(map.lineForScreenRow(3)).toEqual line2
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describe "when the specified buffer row is spanned by multiple line fragments", ->
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it "replaces all spanning line fragments with the given line fragments", ->
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[line1a, line1b] = line1.splitAt(10)
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[line3a, line3b] = line3.splitAt(10)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2])
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map.spliceAtBufferRow(1, 1, [line3a, line3b, line4])
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expect(map.bufferLineCount()).toBe 4
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3a.concat(line3b)
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line2
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describe "when the row following the specified buffer row is spanned by multiple line fragments", ->
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it "replaces the specified row, but no portion of the following row", ->
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[line3a, line3b] = line3.splitAt(10)
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map.insertAtBufferRow(0, [line0, line1, line2, line3a, line3b])
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map.spliceAtBufferRow(2, 1, [line4])
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line1
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line3a.concat(line3b)
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describe "when called with a row count greater than 1", ->
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it "replaces all line fragments spanning the multiple buffer rows with the given line fragments", ->
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[line1a, line1b] = line1.splitAt(10)
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[line3a, line3b] = line3.splitAt(10)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2])
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map.spliceAtBufferRow(1, 2, [line3a, line3b, line4])
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expect(map.bufferLineCount()).toBe 3
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3a.concat(line3b)
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expect(map.lineForScreenRow(2)).toEqual line4
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describe ".spliceAtScreenRow(startRow, rowCount, lineFragemnts)", ->
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describe "when called with a row count of 0", ->
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it "inserts the given line fragments before the specified buffer row", ->
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map.insertAtBufferRow(0, [line0, line1, line2])
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map.spliceAtScreenRow(1, 0, [line3, line4])
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line1
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expect(map.lineForScreenRow(4)).toEqual line2
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describe "when called with a row count of 1", ->
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describe "when the specified screen row is spanned by a single line fragment", ->
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it "replaces the spanning line fragment with the given line fragments", ->
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map.insertAtBufferRow(0, [line0, line1, line2])
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map.spliceAtScreenRow(1, 1, [line3, line4])
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expect(map.bufferLineCount()).toBe 4
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3
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expect(map.lineForScreenRow(2)).toEqual line4
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expect(map.lineForScreenRow(3)).toEqual line2
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describe "when the specified screen row is spanned by multiple line fragments", ->
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it "replaces all spanning line fragments with the given line fragments", ->
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[line0a, line0b] = line0.splitAt(10)
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[line3a, line3b] = line3.splitAt(10)
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map.insertAtBufferRow(0, [line0a, line0b, line1, line2])
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map.spliceAtScreenRow(0, 1, [line3a, line3b, line4])
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expect(map.bufferLineCount()).toBe 4
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expect(map.lineForScreenRow(0)).toEqual line3a.concat(line3b)
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expect(map.lineForScreenRow(1)).toEqual line4
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expect(map.lineForScreenRow(2)).toEqual line1
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expect(map.lineForScreenRow(3)).toEqual line2
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describe "when called with a row count greater than 1", ->
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it "replaces all line fragments spanning the multiple buffer rows with the given line fragments", ->
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[line1a, line1b] = line1.splitAt(10)
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[line3a, line3b] = line3.splitAt(10)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2])
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map.spliceAtScreenRow(1, 2, [line3a, line3b, line4])
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expect(map.bufferLineCount()).toBe 3
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expect(map.lineForScreenRow(0)).toEqual line0
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expect(map.lineForScreenRow(1)).toEqual line3a.concat(line3b)
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expect(map.lineForScreenRow(2)).toEqual line4
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describe ".linesForScreenRows(startRow, endRow)", ->
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it "returns lines for the given row range, concatenating fragments that belong on a single screen line", ->
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[line1a, line1b] = line1.splitAt(11)
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[line3a, line3b] = line3.splitAt(16)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2, line3a, line3b, line4])
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expect(map.linesForScreenRows(1, 3)).toEqual [line1, line2, line3]
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# repeating assertion to cover a regression where this method mutated lines
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expect(map.linesForScreenRows(1, 3)).toEqual [line1, line2, line3]
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describe ".lineForBufferRow(bufferRow)", ->
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it "returns the concatenated screen line fragments that comprise the given buffer row", ->
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line1Text = line1.text
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[line1a, line1b] = line1.splitAt(11)
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line1a.screenDelta = new Point(1, 0)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2])
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expect(map.lineForBufferRow(0).text).toBe line0.text
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expect(map.lineForBufferRow(1).text).toBe line1Text
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describe ".screenPositionForBufferPosition(bufferPosition)", ->
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beforeEach ->
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# line1a-line3b describes a fold
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[line1a, line1b] = line1.splitAt(10)
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[line3a, line3b] = line3.splitAt(20)
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line1a.bufferDelta.row = 2
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line1a.bufferDelta.column = 20
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# line4a-line4b describes a wrapped line
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[line4a, line4b] = line4.splitAt(20)
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line4a.screenDelta = new Point(1, 0)
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map.insertAtBufferRow(0, [line0, line1a, line3b, line4a, line4b])
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it "translates the given buffer position based on buffer and screen deltas of the line fragments in the map", ->
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expect(map.screenPositionForBufferPosition([0, 0])).toEqual [0, 0]
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expect(map.screenPositionForBufferPosition([0, 5])).toEqual [0, 5]
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expect(map.screenPositionForBufferPosition([1, 5])).toEqual [1, 5]
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expect(map.screenPositionForBufferPosition([3, 20])).toEqual [1, 10]
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expect(map.screenPositionForBufferPosition([3, 30])).toEqual [1, 20]
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expect(map.screenPositionForBufferPosition([4, 5])).toEqual [2, 5]
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it "wraps buffer positions at the end of a screen line to the end end of the next screen line", ->
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expect(map.screenPositionForBufferPosition([4, 20])).toEqual [3, 0]
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describe ".screenLineCount()", ->
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it "returns the total of all inserted screen row deltas", ->
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[line1a, line1b] = line1.splitAt(10)
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[line3a, line3b] = line3.splitAt(10)
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line1a.screenDelta = new Point(1, 0)
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line3a.screenDelta = new Point(1, 0)
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map.insertAtBufferRow(0, [line0, line1a, line1b, line2])
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expect(map.screenLineCount()).toBe 4
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