Move findPrecedingToken to ServicesSyntaxUtilities
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49ae281059
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63f43e8352
4 changed files with 109 additions and 175 deletions
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@ -2,13 +2,12 @@
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module ts.formatting {
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export module SmartIndenter {
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export function getIndentation(position: number, sourceFile: SourceFile, options: TypeScript.FormattingOptions): number {
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if (position > sourceFile.text.length) {
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return 0; // past EOF
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}
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var precedingToken = findPrecedingToken(position, sourceFile);
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var precedingToken = ServicesSyntaxUtilities.findPrecedingToken(position, sourceFile);
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if (!precedingToken) {
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return 0;
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}
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@ -137,7 +136,7 @@ module ts.formatting {
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}
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function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken: Node, current: Node, lineAtPosition: number, sourceFile: SourceFile): boolean {
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var nextToken = findNextToken(precedingToken, current);
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var nextToken = ServicesSyntaxUtilities.findNextToken(precedingToken, current);
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if (!nextToken) {
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return false;
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}
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@ -288,112 +287,6 @@ module ts.formatting {
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return column;
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}
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function findNextToken(previousToken: Node, parent: Node): Node {
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return find(parent);
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function find(n: Node): Node {
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if (isToken(n) && n.pos === previousToken.end) {
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// this is token that starts at the end of previous token - return it
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return n;
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}
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var children = n.getChildren();
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for (var i = 0, len = children.length; i < len; ++i) {
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var child = children[i];
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var shouldDiveInChildNode =
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// previous token is enclosed somewhere in the child
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(child.pos <= previousToken.pos && child.end > previousToken.end) ||
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// previous token ends exactly at the beginning of child
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(child.pos === previousToken.end);
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if (shouldDiveInChildNode && nodeHasTokens(child)) {
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return find(child);
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}
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}
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return undefined;
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}
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}
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function findPrecedingToken(position: number, sourceFile: SourceFile): Node {
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return find(sourceFile);
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function findRightmostToken(n: Node): Node {
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if (isToken(n)) {
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return n;
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}
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var children = n.getChildren();
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
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return candidate && findRightmostToken(candidate);
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}
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function find(n: Node): Node {
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if (isToken(n)) {
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return n;
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}
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var children = n.getChildren();
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for (var i = 0, len = children.length; i < len; ++i) {
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var child = children[i];
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if (nodeHasTokens(child)) {
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if (position < child.end) {
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if (child.getStart(sourceFile) >= position) {
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// actual start of the node is past the position - previous token should be at the end of previous child
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
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return candidate && findRightmostToken(candidate)
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}
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else {
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// candidate should be in this node
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return find(child);
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}
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}
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}
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}
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Debug.assert(n.kind === SyntaxKind.SourceFile);
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// Here we know that none of child token nodes embrace the position,
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// the only known case is when position is at the end of the file.
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// Try to find the rightmost token in the file without filtering.
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// Namely we are skipping the check: 'position < node.end'
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if (children.length) {
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
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return candidate && findRightmostToken(candidate);
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}
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}
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/// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
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function findRightmostChildNodeWithTokens(children: Node[], exclusiveStartPosition: number): Node {
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for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
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if (nodeHasTokens(children[i])) {
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return children[i];
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}
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}
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}
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}
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/*
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* Checks if node is something that can contain tokens (except EOF) - filters out EOF tokens, Missing\Omitted expressions, empty SyntaxLists and expression statements that wrap any of listed nodes.
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*/
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function nodeHasTokens(n: Node): boolean {
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if (n.kind === SyntaxKind.ExpressionStatement) {
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return nodeHasTokens((<ExpressionStatement>n).expression);
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}
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if (n.kind === SyntaxKind.EndOfFileToken || n.kind === SyntaxKind.OmittedExpression || n.kind === SyntaxKind.Missing) {
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return false;
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}
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// SyntaxList is already realized so getChildCount should be fast and non-expensive
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return n.kind !== SyntaxKind.SyntaxList || n.getChildCount() !== 0;
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}
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function isToken(n: Node): boolean {
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return n.kind >= SyntaxKind.FirstToken && n.kind <= SyntaxKind.LastToken;
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}
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function nodeContentIsIndented(parent: Node, child: Node): boolean {
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switch (parent.kind) {
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case SyntaxKind.ClassDeclaration:
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@ -11,6 +11,7 @@
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/// <reference path='breakpoints.ts' />
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/// <reference path='indentation.ts' />
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/// <reference path='signatureInfoHelpers.ts' />
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/// <reference path='servicesSyntaxUtilities.ts' />
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/// <reference path='formatting\formatting.ts' />
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/// <reference path='formatting\smartIndenter.ts' />
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@ -3533,7 +3534,7 @@ module ts {
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if (!isToken || position <= node.getStart() || position >= node.getEnd()) {
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// This is a temporary hack until we figure out our token story.
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// The correct solution is to get the previous token
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node = SignatureInfoHelpers.findPrecedingToken(position, sourceFile);
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node = ServicesSyntaxUtilities.findPrecedingToken(position, sourceFile);
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if (!node) {
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return undefined;
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105
src/services/servicesSyntaxUtilities.ts
Normal file
105
src/services/servicesSyntaxUtilities.ts
Normal file
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@ -0,0 +1,105 @@
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// These utilities are common to multiple language service features.
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module ts.ServicesSyntaxUtilities {
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export function findNextToken(previousToken: Node, parent: Node): Node {
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return find(parent);
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function find(n: Node): Node {
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if (isToken(n) && n.pos === previousToken.end) {
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// this is token that starts at the end of previous token - return it
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return n;
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}
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var children = n.getChildren();
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for (var i = 0, len = children.length; i < len; ++i) {
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var child = children[i];
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var shouldDiveInChildNode =
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// previous token is enclosed somewhere in the child
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(child.pos <= previousToken.pos && child.end > previousToken.end) ||
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// previous token ends exactly at the beginning of child
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(child.pos === previousToken.end);
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if (shouldDiveInChildNode && nodeHasTokens(child)) {
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return find(child);
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}
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}
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return undefined;
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}
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}
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export function findPrecedingToken(position: number, sourceFile: SourceFile): Node {
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return find(sourceFile);
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function findRightmostToken(n: Node): Node {
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if (isToken(n)) {
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return n;
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}
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var children = n.getChildren();
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
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return candidate && findRightmostToken(candidate);
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}
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function find(n: Node): Node {
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if (isToken(n)) {
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return n;
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}
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var children = n.getChildren();
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for (var i = 0, len = children.length; i < len; ++i) {
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var child = children[i];
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if (nodeHasTokens(child)) {
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if (position < child.end) {
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if (child.getStart(sourceFile) >= position) {
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// actual start of the node is past the position - previous token should be at the end of previous child
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
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return candidate && findRightmostToken(candidate)
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}
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else {
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// candidate should be in this node
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return find(child);
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}
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}
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}
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}
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Debug.assert(n.kind === SyntaxKind.SourceFile);
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// Here we know that none of child token nodes embrace the position,
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// the only known case is when position is at the end of the file.
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// Try to find the rightmost token in the file without filtering.
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// Namely we are skipping the check: 'position < node.end'
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if (children.length) {
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var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
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return candidate && findRightmostToken(candidate);
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}
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}
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/// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
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function findRightmostChildNodeWithTokens(children: Node[], exclusiveStartPosition: number): Node {
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for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
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if (nodeHasTokens(children[i])) {
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return children[i];
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}
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}
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}
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}
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function nodeHasTokens(n: Node): boolean {
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if (n.kind === SyntaxKind.ExpressionStatement) {
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return nodeHasTokens((<ExpressionStatement>n).expression);
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}
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if (n.kind === SyntaxKind.EndOfFileToken || n.kind === SyntaxKind.OmittedExpression || n.kind === SyntaxKind.Missing) {
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return false;
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}
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// SyntaxList is already realized so getChildCount should be fast and non-expensive
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return n.kind !== SyntaxKind.SyntaxList || n.getChildCount() !== 0;
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}
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function isToken(n: Node): boolean {
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return n.kind >= SyntaxKind.FirstToken && n.kind <= SyntaxKind.LastToken;
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}
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}
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@ -345,70 +345,5 @@ module ts {
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// return null;
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//}
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export function findPrecedingToken(position: number, sourceFile: SourceFile): Node {
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return find(sourceFile, /*diveIntoLastChild*/ false);
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function find(n: Node, diveIntoLastChild: boolean): Node {
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if (isToken(n)) {
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return n;
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}
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var children = n.getChildren();
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if (diveIntoLastChild) {
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var candidate = findLastChildNodeCandidate(children, /*exclusiveStartPosition*/ children.length);
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return candidate && find(candidate, /*diveIntoLastChild*/ true);
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}
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for (var i = 0, len = children.length; i < len; ++i) {
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var child = children[i];
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if (nodeHasTokens(child)) {
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if (position < child.end) {
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if (child.getStart() >= position) {
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// actual start of the node is past the position - previous token should be at the end of previous child
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var candidate = findLastChildNodeCandidate(children, /*exclusiveStartPosition*/ i);
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return candidate && find(candidate, /*diveIntoLastChild*/ true)
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}
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else {
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// candidate should be in this node
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return find(child, diveIntoLastChild);
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}
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}
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}
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}
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// here we know that none of child token nodes embrace the position
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// try to find the closest token on the left
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if (children.length) {
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var candidate = findLastChildNodeCandidate(children, /*exclusiveStartPosition*/ children.length);
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return candidate && find(candidate, /*diveIntoLastChild*/ true);
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}
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}
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/// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
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function findLastChildNodeCandidate(children: Node[], exclusiveStartPosition: number): Node {
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for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
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if (nodeHasTokens(children[i])) {
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return children[i];
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}
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}
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}
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function isToken(n: Node): boolean {
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return n.kind < SyntaxKind.Missing;
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}
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function nodeHasTokens(n: Node): boolean {
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if (n.kind === SyntaxKind.ExpressionStatement) {
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return nodeHasTokens((<ExpressionStatement>n).expression);
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}
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if (n.kind === SyntaxKind.EndOfFileToken || n.kind === SyntaxKind.OmittedExpression || n.kind === SyntaxKind.Missing) {
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return false;
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}
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// SyntaxList is already realized so getChildCount should be fast and non-expensive
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return n.kind !== SyntaxKind.SyntaxList || n.getChildCount() !== 0;
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}
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}
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}
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}
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