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Avoid spurious updates in autoDecreaseIndentForBufferRow

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This commit is contained in:
Max Brunsfeld
2017-09-23 00:22:11 -07:00
parent 9abcad11e4
commit a73de8c0b5
2 changed files with 9 additions and 9 deletions
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13
src/tokenized-buffer.js
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@@ -85,7 +85,8 @@ class TokenizedBuffer {
// Get the suggested indentation level for a line in the buffer on which the user is currently
// typing. This may return a different result from {::suggestedIndentForBufferRow} in order
// to avoid unexpected changes in indentation.
// to avoid unexpected changes in indentation. It may also return undefined if no change should
// be made.
//
// * bufferRow - The row {Number}
//
@@ -93,16 +94,16 @@ class TokenizedBuffer {
suggestedIndentForEditedBufferRow (bufferRow) {
const line = this.buffer.lineForRow(bufferRow)
const currentIndentLevel = this.indentLevelForLine(line)
if (currentIndentLevel === 0) return currentIndentLevel
if (currentIndentLevel === 0) return
const scopeDescriptor = this.scopeDescriptorForPosition([bufferRow, 0])
const decreaseIndentRegex = this.decreaseIndentRegexForScopeDescriptor(scopeDescriptor)
if (!decreaseIndentRegex) return currentIndentLevel
if (!decreaseIndentRegex) return
if (!decreaseIndentRegex.testSync(line)) return currentIndentLevel
if (!decreaseIndentRegex.testSync(line)) return
const precedingRow = this.buffer.previousNonBlankRow(bufferRow)
if (precedingRow == null) return currentIndentLevel
if (precedingRow == null) return
const precedingLine = this.buffer.lineForRow(precedingRow)
let desiredIndentLevel = this.indentLevelForLine(precedingLine)
@@ -118,7 +119,7 @@ class TokenizedBuffer {
}
if (desiredIndentLevel < 0) return 0
if (desiredIndentLevel > currentIndentLevel) return currentIndentLevel
if (desiredIndentLevel >= currentIndentLevel) return
return desiredIndentLevel
}