492 lines
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492 lines
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<main>
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<h1 id="standard-library"><a class="header" href="#standard-library">Standard Library</a></h1>
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<h2 id="stdenv"><a class="header" href="#stdenv"><code>std::env</code></a></h2>
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<p>The <code>std::env</code> module provides access to common system-level environment queries. It is supported on Unix-based systems (Linux, macOS).</p>
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<h3 id="usage"><a class="header" href="#usage">Usage</a></h3>
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<pre><code class="language-rust ignore">import "std::env" as env;
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// Get an environment variable, or fallback to a default
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let shell = env::get_env("SHELL") ?? "unknown";
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// Set an environment variable (current process only)
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env::set_env("DEBUG_MODE", "true");
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// Get the user's home directory
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let home = env::get_home_dir() ?? "/home/user";
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// Get the current working directory
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let cwd = env::get_current_dir() ?? "/";
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// Get the current username
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let user = env::get_username() ?? "nobody";</code></pre>
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<h3 id="functions"><a class="header" href="#functions">Functions</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
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<tr><td><code>get_env</code></td><td>Gets an environment variable's value</td></tr>
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<tr><td><code>set_env</code></td><td>Sets an environment variable (current process only)</td></tr>
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<tr><td><code>get_home_dir</code></td><td>Returns the current user's home directory path if found</td></tr>
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<tr><td><code>get_current_dir</code></td><td>Returns the current working directory</td></tr>
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<tr><td><code>get_username</code></td><td>Gets the current user's username from <code>$USER</code></td></tr>
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</tbody></table>
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</div>
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<h2 id="stdtext"><a class="header" href="#stdtext"><code>std::text</code></a></h2>
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<p>The <code>std::text</code> module provides access to more string manipulation that Rhai lacks.</p>
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<h3 id="usage-1"><a class="header" href="#usage-1">Usage</a></h3>
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<pre><code class="language-rust ignore">import "std::text" as text;
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// Convert a string to a URL-friendly slug
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let slug = text::to_slug("Ewwii is cool!"); // output: "ewwii-is-cool"
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// Convert a string to camelCase
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let camel = text::to_camel_case("my cool project"); // output: "myCoolProject"
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// Truncate a string to N characters (without splitting in the middle of a character)
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let short = text::truncate_chars("hello world", 5); // output: "hello"
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// Convert a string to uppercase
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let upper = text::to_upper("hello"); // output: "HELLO"
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// Convert a string to lowercase
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let lower = text::to_lower("HELLO"); // output: "hello"</code></pre>
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<h3 id="functions-1"><a class="header" href="#functions-1">Functions</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
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<tr><td><code>to_slug</code></td><td>Converts a string into a lowercase, hyphen-separated slug</td></tr>
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<tr><td><code>to_camel_case</code></td><td>Converts a string into camelCase, removing non-alphanumeric characters</td></tr>
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<tr><td><code>truncate_chars</code></td><td>Truncates a string to a maximum number of characters (UTF-8 safe)</td></tr>
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<tr><td><code>to_upper</code></td><td>Converts a string to uppercase</td></tr>
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<tr><td><code>to_lower</code></td><td>Converts a string to lowercase</td></tr>
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</tbody></table>
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</div>
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<h2 id="stdmonitor"><a class="header" href="#stdmonitor"><code>std::monitor</code></a></h2>
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<p>The <code>std::monitor</code> module provides utilities for querying information about connected monitors, including their resolution, dimensions, and DPI.</p>
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<h3 id="usage-2"><a class="header" href="#usage-2">Usage</a></h3>
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<pre><code class="language-rust ignore">import "std::monitor" as monitor;
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// Get number of monitors
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let count = monitor::count(); // e.g., 2
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// Get resolution of the primary monitor
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let (w, h) = monitor::primary_resolution();
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let res_str = monitor::primary_resolution_str(); // e.g., "1920x1080"
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// Get resolutions of all monitors
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let all_res = monitor::all_resolutions();
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let all_res_str = monitor::all_resolutions_str(); // e.g., "1920x1080, 1280x1024"
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// Get dimensions of a specific monitor
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let (x, y, w, h) = monitor::dimensions(0);
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let dim_str = monitor::dimensions_str(0); // e.g., "1920x1080"
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// Get DPI of a monitor
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let dpi = monitor::dpi(0);
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let dpi_str = monitor::dpi_str(0); // e.g., "96.0"</code></pre>
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<h3 id="functions-2"><a class="header" href="#functions-2">Functions</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
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<tr><td><code>count()</code></td><td>Returns the number of connected monitors.</td></tr>
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<tr><td><code>primary_resolution()</code></td><td>Returns the width and height of the primary monitor as a tuple <code>(width, height)</code>.</td></tr>
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<tr><td><code>primary_resolution_str()</code></td><td>Returns the primary monitor resolution as a string in the format <code>"WIDTHxHEIGHT"</code>.</td></tr>
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<tr><td><code>all_resolutions()</code></td><td>Returns a vector of <code>(width, height)</code> tuples for all connected monitors.</td></tr>
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<tr><td><code>all_resolutions_str()</code></td><td>Returns a comma-separated string of all monitor resolutions in <code>"WIDTHxHEIGHT"</code> format.</td></tr>
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<tr><td><code>dimensions(index)</code></td><td>Returns <code>(x, y, width, height)</code> for the monitor at the given index.</td></tr>
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<tr><td><code>dimensions_str(index)</code></td><td>Returns the dimensions of the monitor at the given index as a formatted string <code>"x,y - WxH"</code>.</td></tr>
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<tr><td><code>dpi(index)</code></td><td>Returns the DPI (dots per inch) of the monitor at the given index, accounting for scaling.</td></tr>
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<tr><td><code>dpi_str(index)</code></td><td>Returns the DPI as a formatted string with one decimal place, e.g., <code>"96.0"</code>.</td></tr>
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</tbody></table>
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</div>
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<h3 id="notes"><a class="header" href="#notes">Notes</a></h3>
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<ul>
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<li>Monitor indices are zero-based: the primary monitor is index 0.</li>
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<li>DPI calculation assumes a base of 96 DPI multiplied by the monitor’s scale factor.</li>
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<li>The module automatically initializes GTK if it hasn’t been initialized on the main thread.</li>
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</ul>
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<h2 id="stdjson"><a class="header" href="#stdjson"><code>std::json</code></a></h2>
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<p>The <code>std::json</code> module provides utilities for working with JSON data within Rhai scripts. It allows parsing, serializing, and manipulating JSON objects dynamically.</p>
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<h3 id="usage-3"><a class="header" href="#usage-3">Usage</a></h3>
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<pre><code class="language-rust ignore">import "std::json" as json;
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// Parse a JSON string
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let json_val = json::parse_json(r#"{"name":"Alice","age":30}"#);
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// Convert JSON back to string
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let json_str = json::to_string(json_val);
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// Get a value from a JSON object
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let name = json::get(json_val, "name"); // "Alice"
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// Set a value in a JSON object
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json::set(json_val, "age", 31);</code></pre>
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<h3 id="functions-3"><a class="header" href="#functions-3">Functions</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
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<tr><td><code>parse_json()</code></td><td>Parses a JSON string into a Rhai <code>Dynamic</code> representing a <code>serde_json::Value</code>. Returns an error if parsing fails.</td></tr>
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<tr><td><code>to_string()</code></td><td>Serializes a <code>Dynamic</code> JSON value back into a JSON string.</td></tr>
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<tr><td><code>get()</code></td><td>Retrieves a value by key from a JSON object. Returns <code>()</code> if the key does not exist.</td></tr>
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<tr><td><code>set()</code></td><td>Sets a key-value pair in a JSON object. Returns an error if the value is not a JSON object.</td></tr>
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</tbody></table>
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</div>
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<h3 id="notes-1"><a class="header" href="#notes-1">Notes</a></h3>
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<ul>
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<li>All JSON values are represented as Rhai <code>Dynamic</code> objects internally.</li>
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<li>Keys that do not exist in a JSON object return a <code>UNIT</code> value.</li>
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<li><code>set()</code> only works on JSON objects; trying to set a key on a non-object JSON value will produce an error.</li>
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<li>Parsing and serialization errors are returned as Rhai <code>EvalAltResult</code> errors.</li>
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</ul>
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<h2 id="stdmath"><a class="header" href="#stdmath"><code>std::math</code></a></h2>
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<p>The <code>std::math</code> module provides a collection of mathematical constants and functions.
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It includes basic arithmetic, trigonometry, exponentiation, logarithms, and utility functions.</p>
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<h3 id="usage-4"><a class="header" href="#usage-4">Usage</a></h3>
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<pre><code class="language-rust ignore">import "std::math" as math;
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// Constants
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print(math::PI); // 3.14159...
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print(math::E); // 2.71828...
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print(math::TAU); // 6.28318...
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// Basic math
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let x = math::abs(-42.0); // 42
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let y = math::sqrt(9.0); // 3
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let z = math::pow(2.0, 10.0); // 1024
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// Trigonometry
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let s = math::sin(math::PI / 2); // ~1
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let c = math::cos(0.0); // 1
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let t = math::tan(math::PI / 4); // ~1
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// Exponentials & logs
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let e = math::exp(1.0); // ~2.718
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let l = math::ln(math::E); // 1
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let l10 = math::log10(100.0); // 2
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let l2 = math::log(2.0, 8.0); // 3
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// Inverse trig
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let a = math::asin(1.0); // PI/2
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let b = math::acos(0.0); // PI/2
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let c = math::atan(1.0); // PI/4
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let d = math::atan2(1.0, 1.0); // PI/4
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// Hyperbolic
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let sh = math::sinh(1.0);
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let ch = math::cosh(1.0);
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let th = math::tanh(1.0);
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// Utilities
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let f = math::floor(3.7); // 3
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let r = math::round(3.5); // 4
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let m = math::min(10.0, 20.0); // 10
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let M = math::max(10.0, 20.0); // 20
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let cl = math::clamp(15.0, 0.0, 10.0); // 10
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// Other Utilities
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let tof = math::to_float(42); // 42 -> 42.0
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let toi = math::to_int(3.14); // truncates toward zero -> 3
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// NOTE: to_int does NOT round!
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// If you want nearest integer, use: to_int(math::round(3.14))</code></pre>
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<h3 id="constants"><a class="header" href="#constants">Constants</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Constant</th><th>Value</th><th>Description</th></tr></thead><tbody>
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<tr><td><code>PI</code></td><td>3.14159…</td><td>Circle ratio π</td></tr>
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<tr><td><code>E</code></td><td>2.71828…</td><td>Euler’s number</td></tr>
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<tr><td><code>TAU</code></td><td>6.28318…</td><td>Full circle (2π)</td></tr>
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</tbody></table>
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</div>
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<h3 id="functions-4"><a class="header" href="#functions-4">Functions</a></h3>
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<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
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||
<tr><td><code>abs(x)</code></td><td>Absolute value of <code>x</code></td></tr>
|
||
<tr><td><code>sqrt(x)</code></td><td>Square root of <code>x</code></td></tr>
|
||
<tr><td><code>pow(base, exp)</code></td><td>Base raised to power of exponent</td></tr>
|
||
<tr><td><code>sin(x)</code></td><td>Sine of <code>x</code> (radians)</td></tr>
|
||
<tr><td><code>cos(x)</code></td><td>Cosine of <code>x</code> (radians)</td></tr>
|
||
<tr><td><code>tan(x)</code></td><td>Tangent of <code>x</code> (radians)</td></tr>
|
||
<tr><td><code>exp(x)</code></td><td>e raised to the power <code>x</code></td></tr>
|
||
<tr><td><code>ln(x)</code></td><td>Natural log of <code>x</code></td></tr>
|
||
<tr><td><code>log10(x)</code></td><td>Base-10 log of <code>x</code></td></tr>
|
||
<tr><td><code>log(base, x)</code></td><td>Log of <code>x</code> in <code>base</code></td></tr>
|
||
<tr><td><code>asin(x)</code></td><td>Inverse sine</td></tr>
|
||
<tr><td><code>acos(x)</code></td><td>Inverse cosine</td></tr>
|
||
<tr><td><code>atan(x)</code></td><td>Inverse tangent</td></tr>
|
||
<tr><td><code>atan2(y, x)</code></td><td>Arctangent of <code>y/x</code> considering quadrant</td></tr>
|
||
<tr><td><code>sinh(x)</code></td><td>Hyperbolic sine</td></tr>
|
||
<tr><td><code>cosh(x)</code></td><td>Hyperbolic cosine</td></tr>
|
||
<tr><td><code>tanh(x)</code></td><td>Hyperbolic tangent</td></tr>
|
||
<tr><td><code>floor(x)</code></td><td>Round down</td></tr>
|
||
<tr><td><code>ceil(x)</code></td><td>Round up</td></tr>
|
||
<tr><td><code>round(x)</code></td><td>Round to nearest</td></tr>
|
||
<tr><td><code>trunc(x)</code></td><td>Round toward zero</td></tr>
|
||
<tr><td><code>fract(x)</code></td><td>Fractional part</td></tr>
|
||
<tr><td><code>min(a, b)</code></td><td>Smaller of two values</td></tr>
|
||
<tr><td><code>max(a, b)</code></td><td>Larger of two values</td></tr>
|
||
<tr><td><code>clamp(x, min, max)</code></td><td>Clamp <code>x</code> into <code>[min, max]</code></td></tr>
|
||
<tr><td><code>to_float</code></td><td>Convert an integer or float into a floating-point</td></tr>
|
||
<tr><td><code>to_int</code></td><td>Convert an integer or float into an integer</td></tr>
|
||
</tbody></table>
|
||
</div>
|
||
<h3 id="note"><a class="header" href="#note">Note</a></h3>
|
||
<p>All functions in this module work with floating-point numbers (f64).</p>
|
||
<p>If you pass an integer (e.g. <code>0</code>), Rhai will report an error because there is no math::cos(i64). Use a floating-point literal instead (e.g. <code>0.0</code>).</p>
|
||
<p>All math functions return <code>f64</code>. If you need an integer result, use <code>to_int</code> to convert.</p>
|
||
<h2 id="stdcommand"><a class="header" href="#stdcommand"><code>std::command</code></a></h2>
|
||
<p>The <code>std::command</code> module provides functions which you can use to run shell commands on your system.</p>
|
||
<h3 id="usage-5"><a class="header" href="#usage-5">Usage</a></h3>
|
||
<pre><code class="language-rust ignore">import "std::command" as command;
|
||
|
||
// run a command
|
||
command::run("notify-send Hello!");
|
||
|
||
// run a command and read output from stdout
|
||
let output = command::run_and_read("pwd"); // example output: /home/foo/.config/ewwii/</code></pre>
|
||
<h3 id="functions-5"><a class="header" href="#functions-5">Functions</a></h3>
|
||
<div class="table-wrapper"><table><thead><tr><th>Function</th><th>Description</th></tr></thead><tbody>
|
||
<tr><td><code>run(x)</code></td><td>Run the shell command in <code>x</code></td></tr>
|
||
<tr><td><code>run_and_read(x)</code></td><td>Run the shell command in <code>x</code> and return the stdout</td></tr>
|
||
</tbody></table>
|
||
</div>
|
||
<h3 id="note-1"><a class="header" href="#note-1">Note</a></h3>
|
||
<p>The functions in <code>std::command</code> execute arbitrary shell commands. Only run scripts you trust, as misuse can compromise your system.</p>
|
||
<p>This, along with features like <code>poll</code>, <code>listen</code>, <code>onclick</code>, <code>onhover</code>, etc., which also run shell commands, can be abused by bad actors. Always verify and trust a package before installing it via <a href="https://github.com/Ewwii-sh/eiipm">eiipm</a>. Even if a package is registered in <a href="https://github.com/Ewwii-sh/eii-manifests">eii-manifests</a>, bad actors could change the code of their package without the awareness of maintainers.</p>
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