DisplayBuffer = require '../src/display-buffer' {_} = require 'atom-api' describe "DisplayBuffer", -> [displayBuffer, buffer, changeHandler, tabLength] = [] beforeEach -> tabLength = 2 atom.activatePackage('javascript-tmbundle', sync: true) buffer = project.bufferForPath('sample.js') displayBuffer = new DisplayBuffer({buffer, tabLength}) changeHandler = jasmine.createSpy 'changeHandler' displayBuffer.on 'changed', changeHandler afterEach -> displayBuffer.destroy() buffer.release() describe "@deserialize(state)", -> it "constructs a display buffer with the same buffer, folds, editorWidthInChars, and tabLength", -> displayBuffer.setTabLength(4) displayBuffer.setEditorWidthInChars(64) displayBuffer.createFold(2, 4) displayBuffer2 = deserialize(displayBuffer.serialize()) expect(displayBuffer2.id).toBe displayBuffer.id expect(displayBuffer2.buffer).toBe displayBuffer.buffer expect(displayBuffer2.tokenizedBuffer.buffer).toBe displayBuffer.tokenizedBuffer.buffer expect(displayBuffer2.isFoldedAtBufferRow(2)).toBeTruthy() expect(displayBuffer2.getSoftWrapColumn()).toBe displayBuffer.getSoftWrapColumn() expect(displayBuffer2.getTabLength()).toBe displayBuffer.getTabLength() describe ".copy()", -> it "creates a new DisplayBuffer with the same initial state", -> marker1 = displayBuffer.markBufferRange([[1, 2], [3, 4]], id: 1) marker2 = displayBuffer.markBufferRange([[2, 3], [4, 5]], isReversed: true, id: 2) marker3 = displayBuffer.markBufferPosition([5, 6], id: 3) displayBuffer.createFold(3, 5) displayBuffer2 = displayBuffer.copy() expect(displayBuffer2.id).not.toBe displayBuffer.id expect(displayBuffer2.buffer).toBe displayBuffer.buffer expect(displayBuffer2.getTabLength()).toBe displayBuffer.getTabLength() expect(displayBuffer2.getMarkerCount()).toEqual displayBuffer.getMarkerCount() expect(displayBuffer2.findMarker(id: 1)).toEqual marker1 expect(displayBuffer2.findMarker(id: 2)).toEqual marker2 expect(displayBuffer2.findMarker(id: 3)).toEqual marker3 expect(displayBuffer2.isFoldedAtBufferRow(3)).toBeTruthy() # can diverge from origin displayBuffer2.destroyFoldsContainingBufferRow(3) expect(displayBuffer2.isFoldedAtBufferRow(3)).not.toBe displayBuffer.isFoldedAtBufferRow(3) describe "when the buffer changes", -> it "renders line numbers correctly", -> originalLineCount = displayBuffer.getLineCount() oneHundredLines = [0..100].join("\n") buffer.insert([0,0], oneHundredLines) expect(displayBuffer.getLineCount()).toBe 100 + originalLineCount describe "soft wrapping", -> beforeEach -> displayBuffer.setSoftWrap(true) displayBuffer.setEditorWidthInChars(50) changeHandler.reset() describe "rendering of soft-wrapped lines", -> describe "when editor.softWrapAtPreferredLineLength is set", -> it "uses the preferred line length as the soft wrap column when it is less than the configured soft wrap column", -> config.set('editor.preferredLineLength', 100) config.set('editor.softWrapAtPreferredLineLength', true) expect(displayBuffer.lineForRow(10).text).toBe ' return ' config.set('editor.preferredLineLength', 5) expect(displayBuffer.lineForRow(10).text).toBe 'funct' config.set('editor.softWrapAtPreferredLineLength', false) expect(displayBuffer.lineForRow(10).text).toBe ' return ' describe "when the line is shorter than the max line length", -> it "renders the line unchanged", -> expect(displayBuffer.lineForRow(0).text).toBe buffer.lineForRow(0) describe "when the line is empty", -> it "renders the empty line", -> expect(displayBuffer.lineForRow(13).text).toBe '' describe "when there is a non-whitespace character at the max length boundary", -> describe "when there is whitespace before the boundary", -> it "wraps the line at the end of the first whitespace preceding the boundary", -> expect(displayBuffer.lineForRow(10).text).toBe ' return ' expect(displayBuffer.lineForRow(11).text).toBe 'sort(left).concat(pivot).concat(sort(right));' describe "when there is no whitespace before the boundary", -> it "wraps the line exactly at the boundary since there's no more graceful place to wrap it", -> buffer.change([[0, 0], [1, 0]], 'abcdefghijklmnopqrstuvwxyz\n') displayBuffer.setEditorWidthInChars(10) expect(displayBuffer.lineForRow(0).text).toBe 'abcdefghij' expect(displayBuffer.lineForRow(1).text).toBe 'klmnopqrst' expect(displayBuffer.lineForRow(2).text).toBe 'uvwxyz' describe "when there is a whitespace character at the max length boundary", -> it "wraps the line at the first non-whitespace character following the boundary", -> expect(displayBuffer.lineForRow(3).text).toBe ' var pivot = items.shift(), current, left = [], ' expect(displayBuffer.lineForRow(4).text).toBe 'right = [];' describe "when the buffer changes", -> describe "when buffer lines are updated", -> describe "when whitespace is added after the max line length", -> it "adds whitespace to the end of the current line and wraps an empty line", -> fiftyCharacters = _.multiplyString("x", 50) buffer.setText(fiftyCharacters) buffer.insert([0, 51], " ") describe "when the update makes a soft-wrapped line shorter than the max line length", -> it "rewraps the line and emits a change event", -> buffer.delete([[6, 24], [6, 42]]) expect(displayBuffer.lineForRow(7).text).toBe ' current < pivot ? : right.push(current);' expect(displayBuffer.lineForRow(8).text).toBe ' }' expect(changeHandler).toHaveBeenCalled() [[event]]= changeHandler.argsForCall expect(event).toEqual(start: 7, end: 8, screenDelta: -1, bufferDelta: 0) describe "when the update causes a line to softwrap an additional time", -> it "rewraps the line and emits a change event", -> buffer.insert([6, 28], '1234567890') expect(displayBuffer.lineForRow(7).text).toBe ' current < pivot ? ' expect(displayBuffer.lineForRow(8).text).toBe 'left1234567890.push(current) : ' expect(displayBuffer.lineForRow(9).text).toBe 'right.push(current);' expect(displayBuffer.lineForRow(10).text).toBe ' }' expect(changeHandler).toHaveBeenCalledWith(start: 7, end: 8, screenDelta: 1, bufferDelta: 0) describe "when buffer lines are inserted", -> it "inserts / updates wrapped lines and emits a change event", -> buffer.insert([6, 21], '1234567890 abcdefghij 1234567890\nabcdefghij') expect(displayBuffer.lineForRow(7).text).toBe ' current < pivot1234567890 abcdefghij ' expect(displayBuffer.lineForRow(8).text).toBe '1234567890' expect(displayBuffer.lineForRow(9).text).toBe 'abcdefghij ? left.push(current) : ' expect(displayBuffer.lineForRow(10).text).toBe 'right.push(current);' expect(changeHandler).toHaveBeenCalledWith(start: 7, end: 8, screenDelta: 2, bufferDelta: 1) describe "when buffer lines are removed", -> it "removes lines and emits a change event", -> buffer.change([[3, 21], [7, 5]], ';') expect(displayBuffer.lineForRow(3).text).toBe ' var pivot = items;' expect(displayBuffer.lineForRow(4).text).toBe ' return ' expect(displayBuffer.lineForRow(5).text).toBe 'sort(left).concat(pivot).concat(sort(right));' expect(displayBuffer.lineForRow(6).text).toBe ' };' expect(changeHandler).toHaveBeenCalledWith(start: 3, end: 9, screenDelta: -6, bufferDelta: -4) describe "when a newline is inserted, deleted, and re-inserted at the end of a wrapped line (regression)", -> it "correctly renders the original wrapped line", -> buffer = project.buildBuffer(null, '') displayBuffer = new DisplayBuffer({buffer, tabLength, editorWidthInChars: 30, softWrap: true}) buffer.insert([0, 0], "the quick brown fox jumps over the lazy dog.") buffer.insert([0, Infinity], '\n') buffer.delete([[0, Infinity], [1, 0]]) buffer.insert([0, Infinity], '\n') expect(displayBuffer.lineForRow(0).text).toBe "the quick brown fox jumps over " expect(displayBuffer.lineForRow(1).text).toBe "the lazy dog." expect(displayBuffer.lineForRow(2).text).toBe "" describe "position translation", -> it "translates positions accounting for wrapped lines", -> # before any wrapped lines expect(displayBuffer.screenPositionForBufferPosition([0, 5])).toEqual([0, 5]) expect(displayBuffer.bufferPositionForScreenPosition([0, 5])).toEqual([0, 5]) expect(displayBuffer.screenPositionForBufferPosition([0, 29])).toEqual([0, 29]) expect(displayBuffer.bufferPositionForScreenPosition([0, 29])).toEqual([0, 29]) # on a wrapped line expect(displayBuffer.screenPositionForBufferPosition([3, 5])).toEqual([3, 5]) expect(displayBuffer.bufferPositionForScreenPosition([3, 5])).toEqual([3, 5]) expect(displayBuffer.screenPositionForBufferPosition([3, 50])).toEqual([3, 50]) expect(displayBuffer.screenPositionForBufferPosition([3, 51])).toEqual([3, 50]) expect(displayBuffer.bufferPositionForScreenPosition([4, 0])).toEqual([3, 51]) expect(displayBuffer.bufferPositionForScreenPosition([3, 50])).toEqual([3, 50]) expect(displayBuffer.screenPositionForBufferPosition([3, 62])).toEqual([4, 11]) expect(displayBuffer.bufferPositionForScreenPosition([4, 11])).toEqual([3, 62]) # following a wrapped line expect(displayBuffer.screenPositionForBufferPosition([4, 5])).toEqual([5, 5]) expect(displayBuffer.bufferPositionForScreenPosition([5, 5])).toEqual([4, 5]) # clip screen position inputs before translating expect(displayBuffer.bufferPositionForScreenPosition([-5, -5])).toEqual([0, 0]) expect(displayBuffer.bufferPositionForScreenPosition([Infinity, Infinity])).toEqual([12, 2]) expect(displayBuffer.bufferPositionForScreenPosition([3, -5])).toEqual([3, 0]) expect(displayBuffer.bufferPositionForScreenPosition([3, Infinity])).toEqual([3, 50]) describe ".setEditorWidthInChars(length)", -> it "changes the length at which lines are wrapped and emits a change event for all screen lines", -> displayBuffer.setEditorWidthInChars(40) expect(tokensText displayBuffer.lineForRow(4).tokens).toBe 'left = [], right = [];' expect(tokensText displayBuffer.lineForRow(5).tokens).toBe ' while(items.length > 0) {' expect(tokensText displayBuffer.lineForRow(12).tokens).toBe 'sort(left).concat(pivot).concat(sort(rig' expect(changeHandler).toHaveBeenCalledWith(start: 0, end: 15, screenDelta: 3, bufferDelta: 0) describe "primitive folding", -> beforeEach -> displayBuffer.destroy() buffer.release() buffer = project.bufferForPath('two-hundred.txt') displayBuffer = new DisplayBuffer({buffer, tabLength}) displayBuffer.on 'changed', changeHandler describe "when folds are created and destroyed", -> describe "when a fold spans multiple lines", -> it "replaces the lines spanned by the fold with a placeholder that references the fold object", -> fold = displayBuffer.createFold(4, 7) expect(fold).toBeDefined() [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBe fold expect(line4.text).toMatch /^4-+/ expect(line5.text).toBe '8' expect(changeHandler).toHaveBeenCalledWith(start: 4, end: 7, screenDelta: -3, bufferDelta: 0) changeHandler.reset() fold.destroy() [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBeUndefined() expect(line4.text).toMatch /^4-+/ expect(line5.text).toBe '5' expect(changeHandler).toHaveBeenCalledWith(start: 4, end: 4, screenDelta: 3, bufferDelta: 0) describe "when a fold spans a single line", -> it "renders a fold placeholder for the folded line but does not skip any lines", -> fold = displayBuffer.createFold(4, 4) [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBe fold expect(line4.text).toMatch /^4-+/ expect(line5.text).toBe '5' expect(changeHandler).toHaveBeenCalledWith(start: 4, end: 4, screenDelta: 0, bufferDelta: 0) # Line numbers don't actually change, but it's not worth the complexity to have this # be false for single line folds since they are so rare changeHandler.reset() fold.destroy() [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBeUndefined() expect(line4.text).toMatch /^4-+/ expect(line5.text).toBe '5' expect(changeHandler).toHaveBeenCalledWith(start: 4, end: 4, screenDelta: 0, bufferDelta: 0) describe "when a fold is nested within another fold", -> it "does not render the placeholder for the inner fold until the outer fold is destroyed", -> innerFold = displayBuffer.createFold(6, 7) outerFold = displayBuffer.createFold(4, 8) [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBe outerFold expect(line4.text).toMatch /4-+/ expect(line5.text).toMatch /9-+/ outerFold.destroy() [line4, line5, line6, line7] = displayBuffer.linesForRows(4, 7) expect(line4.fold).toBeUndefined() expect(line4.text).toMatch /^4-+/ expect(line5.text).toBe '5' expect(line6.fold).toBe innerFold expect(line6.text).toBe '6' expect(line7.text).toBe '8' it "allows the outer fold to start at the same location as the inner fold", -> innerFold = displayBuffer.createFold(4, 6) outerFold = displayBuffer.createFold(4, 8) [line4, line5] = displayBuffer.linesForRows(4, 5) expect(line4.fold).toBe outerFold expect(line4.text).toMatch /4-+/ expect(line5.text).toMatch /9-+/ describe "when creating a fold where one already exists", -> it "returns existing fold and does't create new fold", -> fold = displayBuffer.createFold(0,10) expect(displayBuffer.findMarkers(class: 'fold').length).toBe 1 newFold = displayBuffer.createFold(0,10) expect(newFold).toBe fold expect(displayBuffer.findMarkers(class: 'fold').length).toBe 1 describe "when a fold is created inside an existing folded region", -> it "creates/destroys the fold, but does not trigger change event", -> outerFold = displayBuffer.createFold(0, 10) changeHandler.reset() innerFold = displayBuffer.createFold(2, 5) expect(changeHandler).not.toHaveBeenCalled() [line0, line1] = displayBuffer.linesForRows(0, 1) expect(line0.fold).toBe outerFold expect(line1.fold).toBeUndefined() changeHandler.reset() innerFold.destroy() expect(changeHandler).not.toHaveBeenCalled() [line0, line1] = displayBuffer.linesForRows(0, 1) expect(line0.fold).toBe outerFold expect(line1.fold).toBeUndefined() describe "when there is another display buffer pointing to the same buffer", -> it "does not create folds in the other display buffer", -> otherDisplayBuffer = new DisplayBuffer({buffer, tabLength}) displayBuffer.createFold(2, 4) expect(otherDisplayBuffer.foldsStartingAtBufferRow(2).length).toBe 0 describe "when the buffer changes", -> [fold1, fold2] = [] beforeEach -> fold1 = displayBuffer.createFold(2, 4) fold2 = displayBuffer.createFold(6, 8) changeHandler.reset() describe "when the old range surrounds a fold", -> beforeEach -> buffer.change([[1, 0], [5, 1]], 'party!') it "removes the fold and replaces the selection with the new text", -> expect(displayBuffer.lineForRow(0).text).toBe "0" expect(displayBuffer.lineForRow(1).text).toBe "party!" expect(displayBuffer.lineForRow(2).fold).toBe fold2 expect(displayBuffer.lineForRow(3).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 1, end: 3, screenDelta: -2, bufferDelta: -4) describe "when the changes is subsequently undone", -> xit "restores destroyed folds", -> buffer.undo() expect(displayBuffer.lineForRow(2).text).toBe '2' expect(displayBuffer.lineForRow(2).fold).toBe fold1 expect(displayBuffer.lineForRow(3).text).toBe '5' describe "when the old range surrounds two nested folds", -> it "removes both folds and replaces the selection with the new text", -> displayBuffer.createFold(2, 9) changeHandler.reset() buffer.change([[1, 0], [10, 0]], 'goodbye') expect(displayBuffer.lineForRow(0).text).toBe "0" expect(displayBuffer.lineForRow(1).text).toBe "goodbye10" expect(displayBuffer.lineForRow(2).text).toBe "11" expect(changeHandler).toHaveBeenCalledWith(start: 1, end: 3, screenDelta: -2, bufferDelta: -9) describe "when multiple changes happen above the fold", -> it "repositions folds correctly", -> buffer.delete([[1, 1], [2, 0]]) buffer.insert([0, 1], "\nnew") expect(fold1.getStartRow()).toBe 2 expect(fold1.getEndRow()).toBe 4 describe "when the old range precedes lines with a fold", -> describe "when the new range precedes lines with a fold", -> it "updates the buffer and re-positions subsequent folds", -> buffer.change([[0, 0], [1, 1]], 'abc') expect(displayBuffer.lineForRow(0).text).toBe "abc" expect(displayBuffer.lineForRow(1).fold).toBe fold1 expect(displayBuffer.lineForRow(2).text).toBe "5" expect(displayBuffer.lineForRow(3).fold).toBe fold2 expect(displayBuffer.lineForRow(4).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 0, end: 1, screenDelta: -1, bufferDelta: -1) changeHandler.reset() fold1.destroy() expect(displayBuffer.lineForRow(0).text).toBe "abc" expect(displayBuffer.lineForRow(1).text).toBe "2" expect(displayBuffer.lineForRow(3).text).toMatch /^4-+/ expect(displayBuffer.lineForRow(4).text).toBe "5" expect(displayBuffer.lineForRow(5).fold).toBe fold2 expect(displayBuffer.lineForRow(6).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 1, end: 1, screenDelta: 2, bufferDelta: 0) describe "when the old range straddles the beginning of a fold", -> it "destroys the fold", -> buffer.change([[1, 1], [3, 0]], "a\nb\nc\nd\n") expect(displayBuffer.lineForRow(1).text).toBe '1a' expect(displayBuffer.lineForRow(2).text).toBe 'b' expect(displayBuffer.lineForRow(2).fold).toBeUndefined() expect(displayBuffer.lineForRow(3).text).toBe 'c' describe "when the old range follows a fold", -> it "re-positions the screen ranges for the change event based on the preceding fold", -> buffer.change([[10, 0], [11, 0]], 'abc') expect(displayBuffer.lineForRow(1).text).toBe "1" expect(displayBuffer.lineForRow(2).fold).toBe fold1 expect(displayBuffer.lineForRow(3).text).toBe "5" expect(displayBuffer.lineForRow(4).fold).toBe fold2 expect(displayBuffer.lineForRow(5).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 6, end: 7, screenDelta: -1, bufferDelta: -1) describe "when the old range is inside a fold", -> describe "when the end of the new range precedes the end of the fold", -> it "updates the fold and ensures the change is present when the fold is destroyed", -> buffer.insert([3, 0], '\n') expect(fold1.getStartRow()).toBe 2 expect(fold1.getEndRow()).toBe 5 expect(displayBuffer.lineForRow(1).text).toBe "1" expect(displayBuffer.lineForRow(2).text).toBe "2" expect(displayBuffer.lineForRow(2).fold).toBe fold1 expect(displayBuffer.lineForRow(3).text).toMatch "5" expect(displayBuffer.lineForRow(4).fold).toBe fold2 expect(displayBuffer.lineForRow(5).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 2, end: 2, screenDelta: 0, bufferDelta: 1) describe "when the end of the new range exceeds the end of the fold", -> it "expands the fold to contain all the inserted lines", -> buffer.change([[3, 0], [4, 0]], 'a\nb\nc\nd\n') expect(fold1.getStartRow()).toBe 2 expect(fold1.getEndRow()).toBe 7 expect(displayBuffer.lineForRow(1).text).toBe "1" expect(displayBuffer.lineForRow(2).text).toBe "2" expect(displayBuffer.lineForRow(2).fold).toBe fold1 expect(displayBuffer.lineForRow(3).text).toMatch "5" expect(displayBuffer.lineForRow(4).fold).toBe fold2 expect(displayBuffer.lineForRow(5).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 2, end: 2, screenDelta: 0, bufferDelta: 3) describe "when the old range straddles the end of the fold", -> describe "when the end of the new range precedes the end of the fold", -> it "destroys the fold", -> fold2.destroy() buffer.change([[3, 0], [6, 0]], 'a\n') expect(displayBuffer.lineForRow(2).text).toBe '2' expect(displayBuffer.lineForRow(2).fold).toBeUndefined() expect(displayBuffer.lineForRow(3).text).toBe 'a' expect(displayBuffer.lineForRow(4).text).toBe '6' describe "when the old range is contained to a single line in-between two folds", -> it "re-renders the line with the placeholder and re-positions the second fold", -> buffer.insert([5, 0], 'abc\n') expect(displayBuffer.lineForRow(1).text).toBe "1" expect(displayBuffer.lineForRow(2).fold).toBe fold1 expect(displayBuffer.lineForRow(3).text).toMatch "abc" expect(displayBuffer.lineForRow(4).text).toBe "5" expect(displayBuffer.lineForRow(5).fold).toBe fold2 expect(displayBuffer.lineForRow(6).text).toMatch /^9-+/ expect(changeHandler).toHaveBeenCalledWith(start: 3, end: 3, screenDelta: 1, bufferDelta: 1) describe "position translation", -> it "translates positions to account for folded lines and characters and the placeholder", -> fold = displayBuffer.createFold(4, 7) # preceding fold: identity expect(displayBuffer.screenPositionForBufferPosition([3, 0])).toEqual [3, 0] expect(displayBuffer.screenPositionForBufferPosition([4, 0])).toEqual [4, 0] expect(displayBuffer.bufferPositionForScreenPosition([3, 0])).toEqual [3, 0] expect(displayBuffer.bufferPositionForScreenPosition([4, 0])).toEqual [4, 0] # inside of fold: translate to the start of the fold expect(displayBuffer.screenPositionForBufferPosition([4, 35])).toEqual [4, 0] expect(displayBuffer.screenPositionForBufferPosition([5, 5])).toEqual [4, 0] # following fold expect(displayBuffer.screenPositionForBufferPosition([8, 0])).toEqual [5, 0] expect(displayBuffer.screenPositionForBufferPosition([11, 2])).toEqual [8, 2] expect(displayBuffer.bufferPositionForScreenPosition([5, 0])).toEqual [8, 0] expect(displayBuffer.bufferPositionForScreenPosition([9, 2])).toEqual [12, 2] # clip screen positions before translating expect(displayBuffer.bufferPositionForScreenPosition([-5, -5])).toEqual([0, 0]) expect(displayBuffer.bufferPositionForScreenPosition([Infinity, Infinity])).toEqual([200, 0]) # after fold is destroyed fold.destroy() expect(displayBuffer.screenPositionForBufferPosition([8, 0])).toEqual [8, 0] expect(displayBuffer.screenPositionForBufferPosition([11, 2])).toEqual [11, 2] expect(displayBuffer.bufferPositionForScreenPosition([5, 0])).toEqual [5, 0] expect(displayBuffer.bufferPositionForScreenPosition([9, 2])).toEqual [9, 2] describe ".destroyFoldsContainingBufferRow(row)", -> it "destroys all folds containing the given row", -> displayBuffer.createFold(2, 4) displayBuffer.createFold(2, 6) displayBuffer.createFold(7, 8) displayBuffer.createFold(1, 9) displayBuffer.createFold(11, 12) expect(displayBuffer.lineForRow(1).text).toBe '1' expect(displayBuffer.lineForRow(2).text).toBe '10' displayBuffer.destroyFoldsContainingBufferRow(2) expect(displayBuffer.lineForRow(1).text).toBe '1' expect(displayBuffer.lineForRow(2).text).toBe '2' expect(displayBuffer.lineForRow(7).fold).toBeDefined() expect(displayBuffer.lineForRow(8).text).toMatch /^9-+/ expect(displayBuffer.lineForRow(10).fold).toBeDefined() describe ".clipScreenPosition(screenPosition, wrapBeyondNewlines: false, wrapAtSoftNewlines: false, skipAtomicTokens: false)", -> beforeEach -> displayBuffer.setSoftWrap(true) displayBuffer.setEditorWidthInChars(50) it "allows valid positions", -> expect(displayBuffer.clipScreenPosition([4, 5])).toEqual [4, 5] expect(displayBuffer.clipScreenPosition([4, 11])).toEqual [4, 11] it "disallows negative positions", -> expect(displayBuffer.clipScreenPosition([-1, -1])).toEqual [0, 0] expect(displayBuffer.clipScreenPosition([-1, 10])).toEqual [0, 0] expect(displayBuffer.clipScreenPosition([0, -1])).toEqual [0, 0] it "disallows positions beyond the last row", -> expect(displayBuffer.clipScreenPosition([1000, 0])).toEqual [15, 2] expect(displayBuffer.clipScreenPosition([1000, 1000])).toEqual [15, 2] describe "when wrapBeyondNewlines is false (the default)", -> it "wraps positions beyond the end of hard newlines to the end of the line", -> expect(displayBuffer.clipScreenPosition([1, 10000])).toEqual [1, 30] expect(displayBuffer.clipScreenPosition([4, 30])).toEqual [4, 11] expect(displayBuffer.clipScreenPosition([4, 1000])).toEqual [4, 11] describe "when wrapBeyondNewlines is true", -> it "wraps positions past the end of hard newlines to the next line", -> expect(displayBuffer.clipScreenPosition([0, 29], wrapBeyondNewlines: true)).toEqual [0, 29] expect(displayBuffer.clipScreenPosition([0, 30], wrapBeyondNewlines: true)).toEqual [1, 0] expect(displayBuffer.clipScreenPosition([0, 1000], wrapBeyondNewlines: true)).toEqual [1, 0] it "wraps positions in the middle of fold lines to the next screen line", -> displayBuffer.createFold(3, 5) expect(displayBuffer.clipScreenPosition([3, 5], wrapBeyondNewlines: true)).toEqual [4, 0] describe "when wrapAtSoftNewlines is false (the default)", -> it "clips positions at the end of soft-wrapped lines to the character preceding the end of the line", -> expect(displayBuffer.clipScreenPosition([3, 50])).toEqual [3, 50] expect(displayBuffer.clipScreenPosition([3, 51])).toEqual [3, 50] expect(displayBuffer.clipScreenPosition([3, 58])).toEqual [3, 50] expect(displayBuffer.clipScreenPosition([3, 1000])).toEqual [3, 50] describe "when wrapAtSoftNewlines is true", -> it "wraps positions at the end of soft-wrapped lines to the next screen line", -> expect(displayBuffer.clipScreenPosition([3, 50], wrapAtSoftNewlines: true)).toEqual [3, 50] expect(displayBuffer.clipScreenPosition([3, 51], wrapAtSoftNewlines: true)).toEqual [4, 0] expect(displayBuffer.clipScreenPosition([3, 58], wrapAtSoftNewlines: true)).toEqual [4, 0] expect(displayBuffer.clipScreenPosition([3, 1000], wrapAtSoftNewlines: true)).toEqual [4, 0] describe "when skipAtomicTokens is false (the default)", -> it "clips screen positions in the middle of atomic tab characters to the beginning of the character", -> buffer.insert([0, 0], '\t') expect(displayBuffer.clipScreenPosition([0, 0])).toEqual [0, 0] expect(displayBuffer.clipScreenPosition([0, 1])).toEqual [0, 0] expect(displayBuffer.clipScreenPosition([0, tabLength])).toEqual [0, tabLength] describe "when skipAtomicTokens is true", -> it "clips screen positions in the middle of atomic tab characters to the end of the character", -> buffer.insert([0, 0], '\t') expect(displayBuffer.clipScreenPosition([0, 0], skipAtomicTokens: true)).toEqual [0, 0] expect(displayBuffer.clipScreenPosition([0, 1], skipAtomicTokens: true)).toEqual [0, tabLength] expect(displayBuffer.clipScreenPosition([0, tabLength], skipAtomicTokens: true)).toEqual [0, tabLength] describe ".screenPositionForBufferPosition(bufferPosition, options)", -> it "clips the specified buffer position", -> expect(displayBuffer.screenPositionForBufferPosition([0, 2])).toEqual [0, 2] expect(displayBuffer.screenPositionForBufferPosition([0, 100000])).toEqual [0, 29] expect(displayBuffer.screenPositionForBufferPosition([100000, 0])).toEqual [12, 2] expect(displayBuffer.screenPositionForBufferPosition([100000, 100000])).toEqual [12, 2] describe "position translation in the presence of hard tabs", -> it "correctly translates positions on either side of a tab", -> buffer.setText('\t') expect(displayBuffer.screenPositionForBufferPosition([0, 1])).toEqual [0, 2] expect(displayBuffer.bufferPositionForScreenPosition([0, 2])).toEqual [0, 1] describe ".getMaxLineLength()", -> it "returns the length of the longest screen line", -> expect(displayBuffer.getMaxLineLength()).toBe 65 buffer.delete([[6, 0], [6, 65]]) expect(displayBuffer.getMaxLineLength()).toBe 62 describe ".destroy()", -> it "unsubscribes all display buffer markers from their underlying buffer marker (regression)", -> marker = displayBuffer.markBufferPosition([12, 2]) displayBuffer.destroy() expect(marker.bufferMarker.subscriptionCount()).toBe 0 expect( -> buffer.insert([12, 2], '\n')).not.toThrow() describe "markers", -> beforeEach -> displayBuffer.createFold(4, 7) describe "marker creation and manipulation", -> it "allows markers to be created in terms of both screen and buffer coordinates", -> marker1 = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker2 = displayBuffer.markBufferRange([[8, 4], [8, 10]]) expect(marker1.getBufferRange()).toEqual [[8, 4], [8, 10]] expect(marker2.getScreenRange()).toEqual [[5, 4], [5, 10]] it "emits a 'marker-created' event on the DisplayBuffer whenever a marker is created", -> displayBuffer.on 'marker-created', markerCreatedHandler = jasmine.createSpy("markerCreatedHandler") marker1 = displayBuffer.markScreenRange([[5, 4], [5, 10]]) expect(markerCreatedHandler).toHaveBeenCalledWith(marker1) markerCreatedHandler.reset() marker2 = buffer.markRange([[5, 4], [5, 10]]) expect(markerCreatedHandler).toHaveBeenCalledWith(displayBuffer.getMarker(marker2.id)) it "allows marker head and tail positions to be manipulated in both screen and buffer coordinates", -> marker = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker.setHeadScreenPosition([5, 4]) marker.setTailBufferPosition([5, 4]) expect(marker.isReversed()).toBeFalsy() expect(marker.getBufferRange()).toEqual [[5, 4], [8, 4]] marker.setHeadBufferPosition([5, 4]) marker.setTailScreenPosition([5, 4]) expect(marker.isReversed()).toBeTruthy() expect(marker.getBufferRange()).toEqual [[5, 4], [8, 4]] it "returns whether a position changed when it is assigned", -> marker = displayBuffer.markScreenRange([[0, 0], [0, 0]]) expect(marker.setHeadScreenPosition([5, 4])).toBeTruthy() expect(marker.setHeadScreenPosition([5, 4])).toBeFalsy() expect(marker.setHeadBufferPosition([1, 0])).toBeTruthy() expect(marker.setHeadBufferPosition([1, 0])).toBeFalsy() expect(marker.setTailScreenPosition([5, 4])).toBeTruthy() expect(marker.setTailScreenPosition([5, 4])).toBeFalsy() expect(marker.setTailBufferPosition([1, 0])).toBeTruthy() expect(marker.setTailBufferPosition([1, 0])).toBeFalsy() describe "marker change events", -> [markerChangedHandler, marker] = [] beforeEach -> marker = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker.on 'changed', markerChangedHandler = jasmine.createSpy("markerChangedHandler") it "triggers the 'changed' event whenever the markers head's screen position changes in the buffer or on screen", -> marker.setHeadScreenPosition([8, 20]) expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [5, 10] oldHeadBufferPosition: [8, 10] newHeadScreenPosition: [8, 20] newHeadBufferPosition: [11, 20] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [5, 4] newTailBufferPosition: [8, 4] textChanged: false isValid: true } markerChangedHandler.reset() buffer.insert([11, 0], '...') expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [8, 20] oldHeadBufferPosition: [11, 20] newHeadScreenPosition: [8, 23] newHeadBufferPosition: [11, 23] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [5, 4] newTailBufferPosition: [8, 4] textChanged: true isValid: true } markerChangedHandler.reset() displayBuffer.destroyFoldsContainingBufferRow(4) expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [8, 23] oldHeadBufferPosition: [11, 23] newHeadScreenPosition: [11, 23] newHeadBufferPosition: [11, 23] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [8, 4] newTailBufferPosition: [8, 4] textChanged: false isValid: true } markerChangedHandler.reset() displayBuffer.createFold(4, 7) expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [11, 23] oldHeadBufferPosition: [11, 23] newHeadScreenPosition: [8, 23] newHeadBufferPosition: [11, 23] oldTailScreenPosition: [8, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [5, 4] newTailBufferPosition: [8, 4] textChanged: false isValid: true } it "triggers the 'changed' event whenever the marker tail's position changes in the buffer or on screen", -> marker.setTailScreenPosition([8, 20]) expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [5, 10] oldHeadBufferPosition: [8, 10] newHeadScreenPosition: [5, 10] newHeadBufferPosition: [8, 10] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [8, 20] newTailBufferPosition: [11, 20] textChanged: false isValid: true } markerChangedHandler.reset() buffer.insert([11, 0], '...') expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [5, 10] oldHeadBufferPosition: [8, 10] newHeadScreenPosition: [5, 10] newHeadBufferPosition: [8, 10] oldTailScreenPosition: [8, 20] oldTailBufferPosition: [11, 20] newTailScreenPosition: [8, 23] newTailBufferPosition: [11, 23] textChanged: true isValid: true } xit "triggers the 'changed' event whenever the marker is invalidated or revalidated", -> buffer.deleteRow(8) expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [5, 10] oldHeadBufferPosition: [8, 10] newHeadScreenPosition: [5, 10] newHeadBufferPosition: [8, 0] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [5, 4] newTailBufferPosition: [8, 0] textChanged: true isValid: false } markerChangedHandler.reset() buffer.undo() expect(markerChangedHandler).toHaveBeenCalled() expect(markerChangedHandler.argsForCall[0][0]).toEqual { oldHeadScreenPosition: [5, 10] oldHeadBufferPosition: [8, 10] newHeadScreenPosition: [5, 10] newHeadBufferPosition: [8, 10] oldTailScreenPosition: [5, 4] oldTailBufferPosition: [8, 4] newTailScreenPosition: [5, 4] newTailBufferPosition: [8, 4] textChanged: true isValid: true } it "does not call the callback for screen changes that don't change the position of the marker", -> displayBuffer.createFold(10, 11) expect(markerChangedHandler).not.toHaveBeenCalled() xit "updates markers before emitting buffer change events, but does not notify their observers until the change event", -> marker2 = displayBuffer.markBufferRange([[8, 1], [8, 1]]) marker2.on 'changed', marker2ChangedHandler = jasmine.createSpy("marker2ChangedHandler") displayBuffer.on 'changed', changeHandler = jasmine.createSpy("changeHandler").andCallFake -> onDisplayBufferChange() # New change ---- onDisplayBufferChange = -> # calls change handler first expect(markerChangedHandler).not.toHaveBeenCalled() expect(marker2ChangedHandler).not.toHaveBeenCalled() # but still updates the markers expect(marker.getScreenRange()).toEqual [[5, 7], [5, 13]] expect(marker.getHeadScreenPosition()).toEqual [5, 13] expect(marker.getTailScreenPosition()).toEqual [5, 7] expect(marker2.isValid()).toBeFalsy() buffer.change([[8, 0], [8, 2]], ".....") expect(changeHandler).toHaveBeenCalled() expect(markerChangedHandler).toHaveBeenCalled() expect(marker2ChangedHandler).toHaveBeenCalled() # Undo change ---- changeHandler.reset() markerChangedHandler.reset() marker2ChangedHandler.reset() marker3 = displayBuffer.markBufferRange([[8, 1], [8, 2]]) marker3.on 'changed', marker3ChangedHandler = jasmine.createSpy("marker3ChangedHandler") onDisplayBufferChange = -> # calls change handler first expect(markerChangedHandler).not.toHaveBeenCalled() expect(marker2ChangedHandler).not.toHaveBeenCalled() expect(marker3ChangedHandler).not.toHaveBeenCalled() # but still updates the markers expect(marker.getScreenRange()).toEqual [[5, 4], [5, 10]] expect(marker.getHeadScreenPosition()).toEqual [5, 10] expect(marker.getTailScreenPosition()).toEqual [5, 4] expect(marker2.isValid()).toBeTruthy() expect(marker3.isValid()).toBeFalsy() buffer.undo() expect(changeHandler).toHaveBeenCalled() expect(markerChangedHandler).toHaveBeenCalled() expect(marker2ChangedHandler).toHaveBeenCalled() expect(marker3ChangedHandler).toHaveBeenCalled() # Redo change ---- changeHandler.reset() markerChangedHandler.reset() marker2ChangedHandler.reset() marker3ChangedHandler.reset() onDisplayBufferChange = -> # calls change handler first expect(markerChangedHandler).not.toHaveBeenCalled() expect(marker2ChangedHandler).not.toHaveBeenCalled() expect(marker3ChangedHandler).not.toHaveBeenCalled() # but still updates the markers expect(marker.getScreenRange()).toEqual [[5, 7], [5, 13]] expect(marker.getHeadScreenPosition()).toEqual [5, 13] expect(marker.getTailScreenPosition()).toEqual [5, 7] expect(marker2.isValid()).toBeFalsy() expect(marker3.isValid()).toBeTruthy() buffer.redo() expect(changeHandler).toHaveBeenCalled() expect(markerChangedHandler).toHaveBeenCalled() expect(marker2ChangedHandler).toHaveBeenCalled() expect(marker3ChangedHandler).toHaveBeenCalled() it "updates the position of markers before emitting change events that aren't caused by a buffer change", -> displayBuffer.on 'changed', changeHandler = jasmine.createSpy("changeHandler").andCallFake -> # calls change handler first expect(markerChangedHandler).not.toHaveBeenCalled() # but still updates the markers expect(marker.getScreenRange()).toEqual [[8, 4], [8, 10]] expect(marker.getHeadScreenPosition()).toEqual [8, 10] expect(marker.getTailScreenPosition()).toEqual [8, 4] displayBuffer.destroyFoldsContainingBufferRow(4) expect(changeHandler).toHaveBeenCalled() expect(markerChangedHandler).toHaveBeenCalled() describe ".findMarkers(attributes)", -> it "allows the startBufferRow and endBufferRow to be specified", -> marker1 = displayBuffer.markBufferRange([[0, 0], [3, 0]], class: 'a') marker2 = displayBuffer.markBufferRange([[0, 0], [5, 0]], class: 'a') marker3 = displayBuffer.markBufferRange([[9, 0], [10, 0]], class: 'b') expect(displayBuffer.findMarkers(class: 'a', startBufferRow: 0)).toEqual [marker2, marker1] expect(displayBuffer.findMarkers(class: 'a', startBufferRow: 0, endBufferRow: 3)).toEqual [marker1] expect(displayBuffer.findMarkers(endBufferRow: 10)).toEqual [marker3] describe "marker destruction", -> it "allows markers to be destroyed", -> marker = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker.destroy() expect(marker.isValid()).toBeFalsy() expect(displayBuffer.getMarker(marker.id)).toBeUndefined() it "emits 'destroyed' events when markers are destroyed", -> destroyedHandler = jasmine.createSpy("destroyedHandler") marker = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker.on 'destroyed', destroyedHandler marker.destroy() expect(destroyedHandler).toHaveBeenCalled() destroyedHandler.reset() marker2 = displayBuffer.markScreenRange([[5, 4], [5, 10]]) marker2.on 'destroyed', destroyedHandler buffer.getMarker(marker2.id).destroy() expect(destroyedHandler).toHaveBeenCalled() describe "DisplayBufferMarker.copy(attributes)", -> it "creates a copy of the marker with the given attributes merged in", -> initialMarkerCount = displayBuffer.getMarkerCount() marker1 = displayBuffer.markScreenRange([[5, 4], [5, 10]], a: 1, b: 2) expect(displayBuffer.getMarkerCount()).toBe initialMarkerCount + 1 marker2 = marker1.copy(b: 3) expect(marker2.getBufferRange()).toEqual marker1.getBufferRange() expect(displayBuffer.getMarkerCount()).toBe initialMarkerCount + 2 expect(marker1.getAttributes()).toEqual a: 1, b: 2 expect(marker2.getAttributes()).toEqual a: 1, b: 3