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Fix some off by one errors in the overdraw calculations

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This commit is contained in:
Nathan Sobo 2012-05-26 13:52:48 -07:00
parent 328aa3ba6b
commit 8fba4ff935
2 changed files with 12 additions and 7 deletions
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4
spec/app/editor-spec.coffee
View File

@ -478,6 +478,8 @@ fdescribe "Editor", ->
describe "when scrolling vertically", ->
describe "whes scrolling less than the editor's height", ->
it "draws new lines and removes old lines when the last visible line will exceed the last rendered line", ->
expect(editor.visibleLines.find('.line').length).toBe 8
editor.scrollTop(editor.lineHeight * 1.5)
expect(editor.visibleLines.find('.line').length).toBe 8
expect(editor.visibleLines.find('.line:first').text()).toBe buffer.lineForRow(0)
@ -566,7 +568,7 @@ fdescribe "Editor", ->
spyOn(editor, "scrollTo")
describe "when the change the precedes the first rendered row", ->
fffit "inserts and removes rendered lines to account for upstream change", ->
it "inserts and removes rendered lines to account for upstream change", ->
console.log "-------------------"
editor.scrollToBottom()
expect(editor.visibleLines.find(".line:first").text()).toBe buffer.lineForRow(6)

15
src/app/editor.coffee
View File

@ -311,20 +311,20 @@ class Editor extends View
console.log "Rendering lines %d-%d", renderFrom, renderTo
if firstVisibleScreenRow < @firstRenderedScreenRow
@removeLineElements(Math.max(@firstRenderedScreenRow, renderTo), @lastRenderedScreenRow)
@removeLineElements(Math.max(@firstRenderedScreenRow, renderTo + 1), @lastRenderedScreenRow)
@lastRenderedScreenRow = renderTo
@firstRenderedScreenRow = renderFrom
newLines = @buildLineElements(renderFrom, Math.min(@firstRenderedScreenRow, renderTo))
newLines = @buildLineElements(renderFrom, Math.min(@firstRenderedScreenRow - 1, renderTo))
@insertLineElements(renderFrom, newLines)
@firstRenderedScreenRow = renderFrom
adjustPadding = true
if lastVisibleScreenRow > @lastRenderedScreenRow
@removeLineElements(@firstRenderedScreenRow, Math.min(@lastRenderedScreenRow, renderFrom))
@removeLineElements(@firstRenderedScreenRow, Math.min(@lastRenderedScreenRow, renderFrom - 1)) if @firstRenderedScreenRow >= 0
@firstRenderedScreenRow = renderFrom
@lastRenderedScreenRow = renderTo
startRowOfNewLines = Math.max(@lastRenderedScreenRow, renderFrom)
startRowOfNewLines = Math.max(@lastRenderedScreenRow + 1, renderFrom)
newLines = @buildLineElements(startRowOfNewLines, renderTo)
@insertLineElements(startRowOfNewLines, newLines)
@lastRenderedScreenRow = renderTo
adjustPadding = true
if adjustPadding
@ -548,9 +548,12 @@ class Editor extends View
@spliceLineElements(startRow, endRow - startRow + 1, lineElements)
removeLineElements: (startRow, endRow) ->
console.log "removeLineElements", startRow, endRow
@spliceLineElements(startRow, endRow - startRow + 1)
spliceLineElements: (startScreenRow, rowCount, lineElements) ->
throw new Error("Splicing at a negative start row: #{startScreenRow}") if startScreenRow < 0
if startScreenRow < @firstRenderedScreenRow
startRow = 0
else