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Add Buffer.observeMarkerRange

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This commit is contained in:
Nathan Sobo
2013-02-04 11:27:39 -07:00
parent df4ea9293d
commit 44e48d42ea
3 changed files with 76 additions and 3 deletions
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31
spec/app/buffer-spec.coffee
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@@ -739,6 +739,37 @@ describe 'Buffer', ->
buffer.setMarkerHeadPosition(marker, [6, 2])
expect(observeHandler).not.toHaveBeenCalled()
describe ".observeMarkerRange(marker, callback)", ->
[observeHandler, marker] = []
beforeEach ->
observeHandler = jasmine.createSpy("observeHandler")
marker = buffer.markRange([[4, 20], [4, 23]])
buffer.observeMarkerRange(marker, observeHandler)
it "calls the callback when the marker's head position changes", ->
buffer.setMarkerHeadPosition(marker, [6, 2])
expect(observeHandler).toHaveBeenCalled()
expect(observeHandler.argsForCall[0][0]).toEqual { oldRange: [[4, 20], [4, 23]], newRange: [[4, 20], [6, 2]], bufferChanged: false }
observeHandler.reset()
buffer.insert([6, 0], '...')
expect(observeHandler.argsForCall[0][0]).toEqual { oldRange: [[4, 20], [6, 2]], newRange: [[4, 20], [6, 5]], bufferChanged: true }
it "calls the given callback when the marker's tail position changes", ->
buffer.setMarkerTailPosition(marker, [6, 2])
expect(observeHandler).toHaveBeenCalled()
expect(observeHandler.argsForCall[0][0]).toEqual { oldRange: [[4, 20], [4, 23]], newRange: [[4, 23], [6, 2]], bufferChanged: false }
observeHandler.reset()
buffer.insert([6, 0], '...')
expect(observeHandler.argsForCall[0][0]).toEqual { oldRange: [[4, 23], [6, 2]], newRange: [[4, 23], [6, 5]], bufferChanged: true }
it "only calls the callback once when both the marker's head and tail positions change due to the same operation", ->
buffer.insert([4, 0], '...')
expect(observeHandler.callCount).toBe 1
expect(observeHandler.argsForCall[0][0]).toEqual { oldRange: [[4, 20], [4, 23]], newRange: [[4, 23], [4, 26]], bufferChanged: true }
describe "marker destruction", ->
marker = null