Add typescript definitions

Author: zbjornson

CHANGELOG.md

@@ -9,6 +9,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 ==================
 ### Changed
 ### Added
+* Add typescript definitions
 ### Fixed
 * PDF metadata (added in 2.3.0) wasn't being set with `canvas.createPDFStream()`
 * Fix custom "inspect" function deprecation warnings (#1326)

Readme.md

@@ -382,6 +382,8 @@ This is a standard API, but several non-standard calls are supported. The full l
 ```js
 dataUrl = canvas.toDataURL() // defaults to PNG
 dataUrl = canvas.toDataURL('image/png')
+dataUrl = canvas.toDataURL('image/jpeg')
+dataUrl = canvas.toDataURL('image/jpeg', quality) // quality from 0 to 1
 canvas.toDataURL((err, png) => { }) // defaults to PNG
 canvas.toDataURL('image/png', (err, png) => { })
 canvas.toDataURL('image/jpeg', (err, jpeg) => { }) // sync JPEG is not supported
@@ -423,9 +425,9 @@ In `glyph` mode, `ctx.strokeText()` and `ctx.fillText()` behave the same (aside
 
 This property is tracked as part of the canvas state in save/restore.
 
-### CanvasRenderingContext2D#globalCompositeOperator = 'saturate'
+### CanvasRenderingContext2D#globalCompositeOperation = 'saturate'
 
-In addition to all of the standard global composite operators defined by the Canvas specification, the ['saturate'](https://www.cairographics.org/operators/#saturate) operator is also available.
+In addition to all of the standard global composite operations defined by the Canvas specification, the ['saturate'](https://www.cairographics.org/operators/#saturate) operation is also available.
 
 ### CanvasRenderingContext2D#antialias
 

lib/canvas.js

@@ -6,10 +6,6 @@
  * MIT Licensed
  */
 
-/**
- * Module dependencies.
- */
-
 const bindings = require('./bindings')
 const Canvas = module.exports = bindings.Canvas
 const Context2d = require('./context2d')
@@ -24,15 +20,6 @@ Canvas.prototype[util.inspect.custom || 'inspect'] = function () {
   return `[Canvas ${this.width}x${this.height}]`
 }
 
-/**
- * Get a context object.
- *
- * @param {String} contextType must be "2d"
- * @param {Object {alpha: boolean, pixelFormat: PIXEL_FORMAT} } contextAttributes Optional
- * @return {Context2d}
- * @api public
- */
-
 Canvas.prototype.getContext = function (contextType, contextAttributes) {
   if ('2d' == contextType) {
     var ctx = this._context2d || (this._context2d = new Context2d(this, contextAttributes));
@@ -42,77 +29,21 @@ Canvas.prototype.getContext = function (contextType, contextAttributes) {
   }
 };
 
-/**
- * Create a `PNGStream` for `this` canvas.
- *
- * @param {Object} [options]
- * @param {number} [options.compressionLevel] Number from 0 to 9 corresponding
- *   to the ZLIB compression level. Defaults to 6.
- * @param {number} [options.filters] Any bitwise combination of
- *   `PNG_FILTER_NONE`, `PNG_FITLER_SUB`, `PNG_FILTER_UP`, `PNG_FILTER_AVG`,
- *   `PNG_FILTER_PATETH`; or one of `PNG_ALL_FILTERS` or `PNG_NO_FILTERS`. These
- *   specify which filters *may* be used by libpng. During encoding, libpng will
- *   select the best filter from this list of allowed filters.
- * @param {Uint8ClampedArray} [options.palette] Provide for indexed PNG
- *   encoding. Entries should be R-G-B-A values.
- * @param {number} [options.backgroundIndex] Optional index of background color
- *   for indexed PNGs. Defaults to 0.
- * @return {PNGStream}
- * @public
- */
 Canvas.prototype.pngStream =
 Canvas.prototype.createPNGStream = function(options){
   return new PNGStream(this, options);
 };
 
-/**
- * Create a `PDFStream` for `this` canvas.
- *
- * @param {object} [options]
- * @param {string} [options.title]
- * @param {string} [options.author]
- * @param {string} [options.subject]
- * @param {string} [options.keywords]
- * @param {string} [options.creator]
- * @param {Date} [options.creationDate]
- * @param {Date} [options.modDate]
- * @return {PDFStream}
- * @public
- */
 Canvas.prototype.pdfStream =
 Canvas.prototype.createPDFStream = function(options){
   return new PDFStream(this, options);
 };
 
-/**
- * Create a `JPEGStream` for `this` canvas.
- *
- * @param {Object} [options]
- * @param {number} [options.quality] Number from 0 to 1. Defaults to 0.75.
- * @param {boolean|1|2} [options.chromaSubsampling] Enables 2x2 chroma
- *   subsampling. `true` is equivalent to `2`, `false` is equivalent to `1`.
- * @param {boolean} [options.progressive] Enables progressive encoding. Defautls
- *   to false.
- * @return {JPEGStream}
- * @public
- */
 Canvas.prototype.jpegStream =
 Canvas.prototype.createJPEGStream = function(options){
   return new JPEGStream(this, options);
 };
 
-/**
- * Returns a data URI. Pass a function for async operation (non-standard).
- *
- * @param {"image/png"|"image/jpeg"} [type="image/png"] Type.
- * @param {Object|Number} [encoderOptions] A number between 0 and 1 indicating
- * image quality if the requested type is image/jpeg (standard), or an options
- * object for image encoding (see documentation for Canvas#toBuffer)
- * (non-standard).
- * @param {Function} [fn] Callback for asynchronous operation (non-standard).
- * @return {String} data URL if synchronous (callback omitted)
- * @api public
- */
 Canvas.prototype.toDataURL = function(a1, a2, a3){
   // valid arg patterns (args -> [type, opts, fn]):
   // [] -> ['image/png', null, null]

lib/jpegstream.js

@@ -6,29 +6,9 @@
  * MIT Licensed
  */
 
-/**
- * Module dependencies.
- */
-
 var Readable = require('stream').Readable;
 var util = require('util');
 
-/**
- * Initialize a `JPEGStream` with the given `canvas`.
- *
- * "data" events are emitted with `Buffer` chunks, once complete the
- * "end" event is emitted. The following example will stream to a file
- * named "./my.jpeg".
- *
- *     var out = fs.createWriteStream(__dirname + '/my.jpeg')
- *       , stream = canvas.createJPEGStream();
- *
- *     stream.pipe(out);
- *
- * @param {Canvas} canvas
- * @private
- */
-
 var JPEGStream = module.exports = function JPEGStream(canvas, options) {
   if (!(this instanceof JPEGStream)) {
     throw new TypeError("Class constructors cannot be invoked without 'new'");

lib/pdfstream.js

@@ -4,29 +4,9 @@
  * Canvas - PDFStream
  */
 
-/**
- * Module dependencies.
- */
-
 var Readable = require('stream').Readable;
 var util = require('util');
 
-/**
- * Initialize a `PDFStream` with the given `canvas`.
- *
- * "data" events are emitted with `Buffer` chunks, once complete the
- * "end" event is emitted. The following example will stream to a file
- * named "./my.pdf".
- *
- *     var out = fs.createWriteStream(__dirname + '/my.pdf')
- *       , stream = canvas.createPDFStream();
- *
- *     stream.pipe(out);
- *
- * @param {Canvas} canvas
- * @api public
- */
-
 var PDFStream = module.exports = function PDFStream(canvas, options) {
   if (!(this instanceof PDFStream)) {
     throw new TypeError("Class constructors cannot be invoked without 'new'");

lib/pngstream.js

@@ -6,18 +6,9 @@
  * MIT Licensed
  */
 
-/**
- * Module dependencies.
- */
-
 var Readable = require('stream').Readable;
 var util = require('util');
 
-/**
- * @param {Canvas} canvas
- * @param {Object} options
- * @private
- */
 var PNGStream = module.exports = function PNGStream(canvas, options) {
   if (!(this instanceof PNGStream)) {
     throw new TypeError("Class constructors cannot be invoked without 'new'");

package.json

@@ -26,10 +26,11 @@
     "prebenchmark": "node-gyp build",
     "benchmark": "node benchmarks/run.js",
     "pretest": "standard examples/*.js test/server.js test/public/*.js benchmarks/run.js lib/context2d.js util/has_lib.js browser.js index.js && node-gyp build",
-    "test": "mocha test/*.test.js",
+    "test": "mocha test/*.test.js && dtslint types",
     "pretest-server": "node-gyp build",
     "test-server": "node test/server.js",
-    "install": "node-pre-gyp install --fallback-to-build"
+    "install": "node-pre-gyp install --fallback-to-build",
+    "dtslint": "dtslint types"
   },
   "binary": {
     "module_name": "canvas",
@@ -42,14 +43,18 @@
     "binding.gyp",
     "lib/",
     "src/",
-    "util/"
+    "util/",
+    "types/index.d.ts"
   ],
+  "types": "types",
   "dependencies": {
+    "@types/node": "^10.12.18",
     "nan": "^2.12.1",
     "node-pre-gyp": "^0.11.0"
   },
   "devDependencies": {
     "assert-rejects": "^1.0.0",
+    "dtslint": "^0.4.2",
     "express": "^4.16.3",
     "mocha": "^5.2.0",
     "pixelmatch": "^4.0.2",

types/Readme.md

@@ -0,0 +1,4 @@
+Notes:
+
+* `"strict-export-declare-modifiers": false` because of https://github.com/Microsoft/dtslint/issues/184
+* `"unified-signatures": false` because of https://github.com/Microsoft/dtslint/issues/183