63 lines
2.1 KiB
Rust
63 lines
2.1 KiB
Rust
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//! Browser-related platform functions
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use std::collections::HashMap;
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/// Enumerates all possible navigation methods.
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pub enum NavigationMethod {
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/// Indicates that navigation should generate a GET request.
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GET,
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/// Indicates that navigation should generate a POST request.
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POST
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}
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/// A backend interacting with a browser environment.
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pub trait NavigatorBackend {
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/// Cause a browser navigation to a given URL.
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///
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/// The URL given may be any URL scheme a browser can support. This may not
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/// be meaningful for all environments: for example, `javascript:` URLs may
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/// not be executable in a desktop context.
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///
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/// The `window` parameter, if provided, should be treated identically to
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/// the `window` parameter on an HTML `<a>nchor` tag.
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///
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/// This function may be used to send variables to an eligible target. If
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/// desired, the `vars_method` will be specified with a suitable
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/// `NavigationMethod` and a key-value representation of the variables to
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/// be sent. What the backend needs to do depends on the `NavigationMethod`:
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///
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/// * `GET` - Variables are appended onto the query parameters of the given
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/// URL.
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/// * `POST` - Variables are sent as form data in a POST request, as if the
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/// user had filled out and submitted an HTML form.
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///
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/// Flash Player implemented sandboxing to prevent certain kinds of XSS
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/// attacks. The `NavigatorBackend` is not responsible for enforcing this
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/// sandbox.
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fn navigate_to_url(&self, url: String, window: Option<String>, vars_method: Option<(NavigationMethod, HashMap<String, String>)>);
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}
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/// A null implementation for platforms that do not live in a web browser.
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pub struct NullNavigatorBackend {
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}
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impl NullNavigatorBackend {
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pub fn new() -> Self {
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NullNavigatorBackend {
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}
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}
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}
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impl Default for NullNavigatorBackend {
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fn default() -> Self {
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Self::new()
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}
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}
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impl NavigatorBackend for NullNavigatorBackend {
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fn navigate_to_url(&self, _url: String, _window: Option<String>, _vars_method: Option<(NavigationMethod, HashMap<String, String>)>) {
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}
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}
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