Change TreeSitterLanguageMode::bufferRangeForScopeAtPosition(position) to

bufferRangeForScopeAtPosition(selector, position), to match the TextMateLanguageMode
signature, extracting some selector matching logic to do so.

Needed for https://github.com/atom/toggle-quotes/issues/57

src/selectors.js

@@ -0,0 +1,42 @@
+module.exports = {selectorMatchesAnyScope, matcherForSelector}
+
+const _ = require('underscore-plus')
+
+/**
+ * Parse a selector into parts. If already parsed, returns the selector
+ * unmodified.
+ * 
+ * @param {String|Array<String>} selector
+ * @returns {Array<String>} selector parts
+ */
+function parse (selector) {
+  return typeof selector === 'string'
+    ? selector.replace(/^\./, '').split('.')
+    : selector
+}
+
+const always = scope => true
+
+/**
+ * Return a matcher function for a selector.
+ * 
+ * @param {String} selector
+ * @returns {(scope: String) -> Boolean} a matcher function
+ */
+function matcherForSelector (selector) {
+  const parts = parse(selector)
+  return selector
+    ? scope => _.isSubset(parts, parse(scope))
+    : always
+}
+
+/**
+ * Return true iff the selector matches any provided scope.
+ * 
+ * @param {String} selector
+ * @param {Array<String>} scopes
+ * @returns {Boolean} true if any scope matches the selector
+ */
+function selectorMatchesAnyScope (selector, scopes) {
+  return !selector || scopes.some(matcherForSelector(selector))
+}

src/text-mate-language-mode.js

@@ -7,6 +7,7 @@ const ScopeDescriptor = require('./scope-descriptor')
 const NullGrammar = require('./null-grammar')
 const {OnigRegExp} = require('oniguruma')
 const {toFirstMateScopeId, fromFirstMateScopeId} = require('./first-mate-helpers')
+const {selectorMatchesAnyScope} = require('./selectors')
 
 const NON_WHITESPACE_REGEX = /\S/
 
@@ -726,14 +727,6 @@ class TextMateLanguageMode {
 
 TextMateLanguageMode.prototype.chunkSize = 50
 
-function selectorMatchesAnyScope (selector, scopes) {
-  const targetClasses = selector.replace(/^\./, '').split('.')
-  return scopes.some((scope) => {
-    const scopeClasses = scope.split('.')
-    return _.isSubset(targetClasses, scopeClasses)
-  })
-}
-
 class TextMateHighlightIterator {
   constructor (languageMode) {
     this.languageMode = languageMode

src/tree-sitter-language-mode.js

@@ -5,6 +5,7 @@ const {Emitter, Disposable} = require('event-kit')
 const ScopeDescriptor = require('./scope-descriptor')
 const TokenizedLine = require('./tokenized-line')
 const TextMateLanguageMode = require('./text-mate-language-mode')
+const {matcherForSelector} = require('./selectors')
 
 let nextId = 0
 const MAX_RANGE = new Range(Point.ZERO, Point.INFINITY).freeze()
@@ -348,25 +349,28 @@ class TreeSitterLanguageMode {
   Section - Syntax Tree APIs
   */
 
-  getRangeForSyntaxNodeContainingRange (range) {
+  getRangeForSyntaxNodeContainingRange (range, selector) {
     const startIndex = this.buffer.characterIndexForPosition(range.start)
     const endIndex = this.buffer.characterIndexForPosition(range.end)
     const searchEndIndex = Math.max(0, endIndex - 1)
 
+    const matches = matcherForSelector(selector)
+
     let smallestNode
     this._forEachTreeWithRange(range, tree => {
       let node = tree.rootNode.descendantForIndex(startIndex, searchEndIndex)
       while (node && !nodeContainsIndices(node, startIndex, endIndex)) {
         node = node.parent
+        console.log(node)
       }
-      if (nodeIsSmaller(node, smallestNode)) smallestNode = node
+      if (matches(node.type) && nodeIsSmaller(node, smallestNode)) smallestNode = node
     })
 
     if (smallestNode) return rangeForNode(smallestNode)
   }
 
-  bufferRangeForScopeAtPosition (position) {
-    return this.getRangeForSyntaxNodeContainingRange(new Range(position, position))
+  bufferRangeForScopeAtPosition (selector, position) {
+    return this.getRangeForSyntaxNodeContainingRange(new Range(position, position), selector)
   }
 
   /*