169 lines
6.8 KiB
HTML
169 lines
6.8 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<head>
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<link rel="stylesheet" href="../../style.css">
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<script data-goatcounter="https://services.opengamestudio.org:443/count" async src="//services.opengamestudio.org:443/count.js"></script>
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<div class="menu">
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<a href="../../en/news/index.html">News</a>
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<a href="../../en/news/cld_ctx-gen.html">EN</a>
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<a href="../../ru/news/cld_ctx-gen.html">RU</a>
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<div class="clear"></div>
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</div>
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</div>
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<h3 class="left_item_title">In the news...</h3>
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<center>
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<div class="news_item">
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<h2 class="news_item_title">
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<a href="cld_ctx-gen.html">CLD: Context generation</a>
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</h2>
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<p class="news_item_date">
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2025-03-11 00:00
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</p>
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<div class="news_item_contents">
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<p><img src="../../images/2025-03_redux-data-flow.jpg" alt="splash" /></p>
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<h1 id="contextgeneration">Context generation</h1>
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<p>In February I've updated the <strong>C</strong>ross-<strong>l</strong>anguage <strong>d</strong>ialect (CLD) translator to
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generate Context out of YML. The generated Contexts have already been
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used for the following projects:</p>
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<ul>
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<li>CLD (the CLD translator generated its own Context)</li>
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<li>LHA</li>
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<li>PSKOV</li>
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</ul>
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<p>I never really took time to explain what Context is, so here's
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a very short explanation: Context is very close to
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<a href="https://redux.js.org/introduction/getting-started#basic-example">Store in Redux</a>. I'm afraid this is not yet the time
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to explain Context in detail because I don't yet have a good
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argument why you need Context. Once that time comes I do it.</p>
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<p>Now let's get back to the Context generation. Here's how LHA's YML for Context looks like: (<a href="https://github.com/OGStudio/local-host-access/blob/main/cld/entities.yml">entities.yml</a>):</p>
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<pre><code># Application state context
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Context:
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type: context
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fields:
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# Command line arguments
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arguments: [String]
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consoleOutput: String
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defaultDir: String
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didLaunch: Bool
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dir: String
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httpDefaultPort: Int
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httpLaunch: Bool
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httpPort: Int
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httpReply: String
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httpRequest: NetRequest
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</code></pre>
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<p>CLD translator converts it to the following code in Kotlin (<a href="https://github.com/OGStudio/local-host-access/blob/main/src/entities.kt#L3">entities.kt</a>):</p>
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<pre><code>// Application state context
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data class Context(
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// Command line arguments
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var arguments: Array<String> = arrayOf(),
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var consoleOutput: String = "",
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var defaultDir: String = "",
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var didLaunch: Boolean = false,
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var dir: String = "",
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var httpDefaultPort: Int = 0,
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var httpLaunch: Boolean = false,
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var httpPort: Int = 0,
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var httpReply: String = "",
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var httpRequest: NetRequest = NetRequest(),
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override var recentField: String = "",
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): CLDContext {
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override fun <T> field(name: String): T {
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if (name == "arguments") {
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return arguments as T
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} else if (name == "consoleOutput") {
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return consoleOutput as T
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} else if (name == "defaultDir") {
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return defaultDir as T
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} else if (name == "didLaunch") {
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return didLaunch as T
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} else if (name == "dir") {
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return dir as T
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} else if (name == "httpDefaultPort") {
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return httpDefaultPort as T
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} else if (name == "httpLaunch") {
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return httpLaunch as T
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} else if (name == "httpPort") {
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return httpPort as T
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} else if (name == "httpReply") {
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return httpReply as T
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} else if (name == "httpRequest") {
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return httpRequest as T
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}
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return "unknown-field-name" as T
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}
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override fun selfCopy(): CLDContext {
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return this.copy()
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}
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override fun setField(
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name: String,
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value: Any?
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) {
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if (name == "arguments") {
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arguments = value as Array<String>
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} else if (name == "consoleOutput") {
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consoleOutput = value as String
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} else if (name == "defaultDir") {
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defaultDir = value as String
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} else if (name == "didLaunch") {
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didLaunch = value as Boolean
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} else if (name == "dir") {
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dir = value as String
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} else if (name == "httpDefaultPort") {
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httpDefaultPort = value as Int
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} else if (name == "httpLaunch") {
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httpLaunch = value as Boolean
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} else if (name == "httpPort") {
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httpPort = value as Int
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} else if (name == "httpReply") {
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httpReply = value as String
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} else if (name == "httpRequest") {
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httpRequest = value as NetRequest
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}
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}
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}
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</code></pre>
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<h1 id="march">March</h1>
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<p>Kotlin is currently the anchor programming language of CLD. Thus, to use Kotlin,
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one would have to install related Java tools (Gradle, Android Studio or JVM itself).
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Such a requirement makes it impossible to have a web browser only development
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tool. And being able to code in a web browser is something I consider the
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key feature for code portability.</p>
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<p>That's why in March I plan to create the draft of a tool running in a web browser.</p>
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from <a href="http://github.com/ogstudio/site-opengamestudio">this source code</a>.
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