forked from microsoft/TypeScript
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathjsDoc.ts
More file actions
243 lines (223 loc) · 9.54 KB
/
jsDoc.ts
File metadata and controls
243 lines (223 loc) · 9.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/* @internal */
namespace ts.JsDoc {
const jsDocTagNames = [
"augments",
"author",
"argument",
"borrows",
"class",
"constant",
"constructor",
"constructs",
"default",
"deprecated",
"description",
"event",
"example",
"extends",
"field",
"fileOverview",
"function",
"ignore",
"inner",
"lends",
"link",
"memberOf",
"name",
"namespace",
"param",
"private",
"property",
"public",
"requires",
"returns",
"see",
"since",
"static",
"throws",
"type",
"typedef",
"property",
"prop",
"version"
];
let jsDocCompletionEntries: CompletionEntry[];
export function getJsDocCommentsFromDeclarations(declarations: Declaration[]) {
// Only collect doc comments from duplicate declarations once:
// In case of a union property there might be same declaration multiple times
// which only varies in type parameter
// Eg. const a: Array<string> | Array<number>; a.length
// The property length will have two declarations of property length coming
// from Array<T> - Array<string> and Array<number>
const documentationComment = <SymbolDisplayPart[]>[];
forEachUnique(declarations, declaration => {
const comments = getJSDocComments(declaration, /*checkParentVariableStatement*/ true);
if (!comments) {
return;
}
for (const comment of comments) {
if (comment) {
if (documentationComment.length) {
documentationComment.push(lineBreakPart());
}
documentationComment.push(textPart(comment));
}
}
});
return documentationComment;
}
/**
* Iterates through 'array' by index and performs the callback on each element of array until the callback
* returns a truthy value, then returns that value.
* If no such value is found, the callback is applied to each element of array and undefined is returned.
*/
function forEachUnique<T, U>(array: T[], callback: (element: T, index: number) => U): U {
if (array) {
for (let i = 0, len = array.length; i < len; i++) {
if (indexOf(array, array[i]) === i) {
const result = callback(array[i], i);
if (result) {
return result;
}
}
}
}
return undefined;
}
export function getAllJsDocCompletionEntries(): CompletionEntry[] {
return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, tagName => {
return {
name: tagName,
kind: ScriptElementKind.keyword,
kindModifiers: "",
sortText: "0",
};
}));
}
/**
* Checks if position points to a valid position to add JSDoc comments, and if so,
* returns the appropriate template. Otherwise returns an empty string.
* Valid positions are
* - outside of comments, statements, and expressions, and
* - preceding a:
* - function/constructor/method declaration
* - class declarations
* - variable statements
* - namespace declarations
*
* Hosts should ideally check that:
* - The line is all whitespace up to 'position' before performing the insertion.
* - If the keystroke sequence "/\*\*" induced the call, we also check that the next
* non-whitespace character is '*', which (approximately) indicates whether we added
* the second '*' to complete an existing (JSDoc) comment.
* @param fileName The file in which to perform the check.
* @param position The (character-indexed) position in the file where the check should
* be performed.
*/
export function getDocCommentTemplateAtPosition(newLine: string, sourceFile: SourceFile, position: number): TextInsertion {
// Check if in a context where we don't want to perform any insertion
if (isInString(sourceFile, position) || isInComment(sourceFile, position) || hasDocComment(sourceFile, position)) {
return undefined;
}
const tokenAtPos = getTokenAtPosition(sourceFile, position);
const tokenStart = tokenAtPos.getStart();
if (!tokenAtPos || tokenStart < position) {
return undefined;
}
// TODO: add support for:
// - enums/enum members
// - interfaces
// - property declarations
// - potentially property assignments
let commentOwner: Node;
findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
switch (commentOwner.kind) {
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.Constructor:
case SyntaxKind.ClassDeclaration:
case SyntaxKind.VariableStatement:
break findOwner;
case SyntaxKind.SourceFile:
return undefined;
case SyntaxKind.ModuleDeclaration:
// If in walking up the tree, we hit a a nested namespace declaration,
// then we must be somewhere within a dotted namespace name; however we don't
// want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
if (commentOwner.parent.kind === SyntaxKind.ModuleDeclaration) {
return undefined;
}
break findOwner;
}
}
if (!commentOwner || commentOwner.getStart() < position) {
return undefined;
}
const parameters = getParametersForJsDocOwningNode(commentOwner);
const posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
const lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
const indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
let docParams = "";
for (let i = 0, numParams = parameters.length; i < numParams; i++) {
const currentName = parameters[i].name;
const paramName = currentName.kind === SyntaxKind.Identifier ?
(<Identifier>currentName).text :
"param" + i;
docParams += `${indentationStr} * @param ${paramName}${newLine}`;
}
// A doc comment consists of the following
// * The opening comment line
// * the first line (without a param) for the object's untagged info (this is also where the caret ends up)
// * the '@param'-tagged lines
// * TODO: other tags.
// * the closing comment line
// * if the caret was directly in front of the object, then we add an extra line and indentation.
const preamble = "/**" + newLine +
indentationStr + " * ";
const result =
preamble + newLine +
docParams +
indentationStr + " */" +
(tokenStart === position ? newLine + indentationStr : "");
return { newText: result, caretOffset: preamble.length };
}
function getParametersForJsDocOwningNode(commentOwner: Node): ParameterDeclaration[] {
if (isFunctionLike(commentOwner)) {
return commentOwner.parameters;
}
if (commentOwner.kind === SyntaxKind.VariableStatement) {
const varStatement = <VariableStatement>commentOwner;
const varDeclarations = varStatement.declarationList.declarations;
if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
}
}
return emptyArray;
}
/**
* Digs into an an initializer or RHS operand of an assignment operation
* to get the parameters of an apt signature corresponding to a
* function expression or a class expression.
*
* @param rightHandSide the expression which may contain an appropriate set of parameters
* @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
*/
function getParametersFromRightHandSideOfAssignment(rightHandSide: Expression): ParameterDeclaration[] {
while (rightHandSide.kind === SyntaxKind.ParenthesizedExpression) {
rightHandSide = (<ParenthesizedExpression>rightHandSide).expression;
}
switch (rightHandSide.kind) {
case SyntaxKind.FunctionExpression:
case SyntaxKind.ArrowFunction:
return (<FunctionExpression>rightHandSide).parameters;
case SyntaxKind.ClassExpression:
for (const member of (<ClassExpression>rightHandSide).members) {
if (member.kind === SyntaxKind.Constructor) {
return (<ConstructorDeclaration>member).parameters;
}
}
break;
}
return emptyArray;
}
}