gen-phzr

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Clojure app to generate phzr code from Phaser javascript source

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# gen-phzr

Generate phzr clojurescript files based on JSON data built from parsing jsdoc
comments in Phaser javascript source.

## Usage

### Prerequisites

* JVM
* [leiningen](http://leiningen.org/)
* [Node.js](https://nodejs.org/)

### Generate jsdoc JSON

To generate the `resources/phaser.json` file required by gen-phzr, first
change into the `resources/phaser-src` directory. Then run the following
commands:

```bash
grunt clean
grunt pixidoc
grunt gitclone:plugins
grunt jsdoc:json
```

Install whatever grunt/node packages are necessary to make those commands run
successfully. Once they've all run without error, copy the generated JSON file
into the gen-phzr project resources:

```bash
cp out/docs.json ../phaser.json
```

### Generate phzr code

Change back into the gen-phzr project root directory and run:

```bash
lein run
```

All generated files will be copied into the `out/` directory.

## Manual Edits

Some generated files require hand-tweaking because:

1. I am *lazy* and the code to fix them programmatically is somewhat cumbersome

Apply the following changes once the source files have been generated:

### Fix array-set/call-all - 2015-08-15

The `array-set/call-all` function should take varargs. This is
not conveyed by the jsdoc JSON clearly. The function def should look like:

```clojure
(defn call-all
"Calls a function on all members of this list, using the member as the context
for the callback.

If the `key` property is present it must be a function.
  The function is invoked using the item as the context.

Parameters:
    * array-set (Phaser.ArraySet) - Targeted instance for method
    * key (string) - The name of the property with the function to call.
    * parameters (*) - Additional parameters that will be passed to the callback."
  ([array-set key & parameters]
   (phaser->clj
    (.callAll array-set
              (clj->phaser key)
              (clj->phaser parameters)))))
```

### Add keyboard key constants - 2015-08-15

The `Phaser.Keyboard` class has a bunch of [undocumented constants](https://github.com/photonstorm/phaser/blob/v2.4.2/src/input/Keyboard.js#L580)
so the accessor map for those will have to be added to the
[impl/accessors/keyboard.cljs](https://github.com/dparis/phzr/blob/master/src/phzr/impl/accessors/keyboard.cljs) file manually.

As well, the `phzr.keyboard/const` function will need to be defined as follows:

```clojure
(defn const
  [k]
  (when-let [cn (get phzr.impl.accessors.keyboard/keyboard-constants k)]
    (aget js/Phaser.Keyboard cn)))

```

## Bugs

I'm sure there are some. This app was cobbled together hastily in order to get
phzr up and running. Maybe someone will find it useful? I hope so!

Distributed under the MIT license.

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