Move rowRangeForParagraphAtBufferRow into LanguageMode

spec/app/language-mode-spec.coffee

@@ -58,6 +58,47 @@ describe "LanguageMode", ->
         expect(languageMode.suggestedIndentForBufferRow(2)).toBe 2
         expect(languageMode.suggestedIndentForBufferRow(9)).toBe 1
 
+    describe "rowRangeForParagraphAtBufferRow", ->
+      describe "with code and comments", ->
+        beforeEach ->
+          buffer.setText '''
+            var quicksort = function () {
+              /* Single line comment block */
+              var sort = function(items) {};
+
+              /*
+              A multiline
+              comment is here
+              */
+              var sort = function(items) {};
+
+              // A comment
+              //
+              // Multiple comment
+              // lines
+              var sort = function(items) {};
+              // comment line after fn
+            };
+          '''
+
+      it "will limit paragraph range to comments", ->
+        range = languageMode.rowRangeForParagraphAtBufferRow(0)
+        expect(range).toEqual [[0,0], [0,29]]
+
+        range = languageMode.rowRangeForParagraphAtBufferRow(10)
+        expect(range).toEqual [[10,0], [10,14]]
+        range = languageMode.rowRangeForParagraphAtBufferRow(11)
+        expect(range).toBeFalsy()
+        range = languageMode.rowRangeForParagraphAtBufferRow(12)
+        expect(range).toEqual [[12,0], [13,10]]
+
+        range = languageMode.rowRangeForParagraphAtBufferRow(14)
+        expect(range).toEqual [[14,0], [14,32]]
+
+        range = languageMode.rowRangeForParagraphAtBufferRow(15)
+        expect(range).toEqual [[15,0], [15,26]]
+
+
   describe "coffeescript", ->
     beforeEach ->
       atom.activatePackage('coffee-script-tmbundle', sync: true)
@@ -159,7 +200,6 @@ describe "LanguageMode", ->
         expect(buffer.lineForRow(0)).toBe "// @color: #4D926F;"
 
   describe "folding", ->
-
     beforeEach ->
       atom.activatePackage('javascript-tmbundle', sync: true)
       editSession = project.open('sample.js', autoIndent: false)
@@ -301,9 +341,3 @@ describe "LanguageMode", ->
 
         fold2 = editSession.lineForScreenRow(5).fold
         expect(fold2).toBeFalsy()
-
-
-
-
-
-

src/app/cursor.coffee

@@ -404,21 +404,7 @@ class Cursor
   #
   # Returns a {Range}.
   getCurrentParagraphBufferRange: ->
-    row = @getBufferRow()
-    return unless /\w/.test(@editSession.lineForBufferRow(row))
-
-    startRow = row
-    while startRow > 0
-      break unless /\w/.test(@editSession.lineForBufferRow(startRow - 1))
-      startRow--
-
-    endRow = row
-    lastRow = @editSession.getLastBufferRow()
-    while endRow < lastRow
-      break unless /\w/.test(@editSession.lineForBufferRow(endRow + 1))
-      endRow++
-
-    new Range([startRow, 0], [endRow, @editSession.lineLengthForBufferRow(endRow)])
+    @editSession.languageMode.rowRangeForParagraphAtBufferRow(@getBufferRow())
 
   # Retrieves the characters that constitute a word preceeding the current cursor position.
   #

src/app/language-mode.coffee

@@ -177,6 +177,38 @@ class LanguageMode
     return false unless nextNonEmptyRow?
     @editSession.indentationForBufferRow(nextNonEmptyRow) > @editSession.indentationForBufferRow(bufferRow)
 
+  # Find a row range for a 'paragraph' around specified bufferRow.
+  # Right now, a paragraph is a block of text bounded by and empty line or a
+  # block of text that is not the same type (comments next to source code).
+  rowRangeForParagraphAtBufferRow: (bufferRow) ->
+    return unless /\w/.test(@editSession.lineForBufferRow(bufferRow))
+
+    isRowComment = (row) =>
+      !!@editSession.displayBuffer.tokenizedBuffer.lineForScreenRow(row).isComment()
+
+    if isRowComment(bufferRow)
+      isOriginalRowComment = true
+      range = @rowRangeForCommentAtBufferRow(bufferRow)
+      [firstRow, lastRow] = range or [bufferRow, bufferRow]
+    else
+      isOriginalRowComment = false
+      [firstRow, lastRow] = [0, @editSession.getLastBufferRow()-1]
+
+    startRow = bufferRow
+    while startRow > firstRow
+      break if isRowComment(startRow - 1) != isOriginalRowComment
+      break unless /\w/.test(@editSession.lineForBufferRow(startRow - 1))
+      startRow--
+
+    endRow = bufferRow
+    lastRow = @editSession.getLastBufferRow()
+    while endRow < lastRow
+      break if isRowComment(endRow + 1) != isOriginalRowComment
+      break unless /\w/.test(@editSession.lineForBufferRow(endRow + 1))
+      endRow++
+
+    new Range([startRow, 0], [endRow, @editSession.lineLengthForBufferRow(endRow)])
+
   # Given a buffer row, this returns a suggested indentation level.
   #
   # The indentation level provided is based on the current {LanguageMode}.