perspective 2.0.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
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////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2018, the Perspective Authors.
//
// This file is part of the Perspective library, distributed under the terms
// of the Apache License 2.0.  The full license can be found in the LICENSE
// file.

use wasm_bindgen::prelude::*;

use crate::js::*;
use crate::utils::*;
use crate::*;

/// The `<perspective-viewer-plugin>` element, the default perspective plugin
/// which is registered and activated automcatically when a
/// `<perspective-viewer>` is loaded without plugins.  While you will not
/// typically instantiate this class directly, it is simple enough to function
/// as a good "default" plugin implementation which can be extended to create
/// custom plugins.
///
/// # Example
/// ```javascript
/// class MyPlugin extends customElements.get("perspective-viewer-plugin") {
///    // Custom plugin overrides
/// }
/// ```
#[wasm_bindgen]
pub struct PerspectiveDebugPluginElement {
    elem: web_sys::HtmlElement,
}

impl CustomElementMetadata for PerspectiveDebugPluginElement {
    const CUSTOM_ELEMENT_NAME: &'static str = "perspective-viewer-plugin";
}

#[wasm_bindgen]
impl PerspectiveDebugPluginElement {
    #[wasm_bindgen(constructor)]
    pub fn new(elem: web_sys::HtmlElement) -> Self {
        Self { elem }
    }

    #[wasm_bindgen(getter)]
    pub fn name(&self) -> String {
        "Debug".to_owned()
    }

    #[wasm_bindgen(getter)]
    pub fn select_mode(&self) -> String {
        "select".to_owned()
    }

    #[wasm_bindgen(getter)]
    pub fn min_config_columns(&self) -> JsValue {
        JsValue::UNDEFINED
    }

    #[wasm_bindgen(getter)]
    pub fn config_column_names(&self) -> JsValue {
        JsValue::UNDEFINED
    }

    pub fn update(&self, view: JsPerspectiveView) -> ApiFuture<()> {
        self.draw(view)
    }

    pub fn draw(&self, view: JsPerspectiveView) -> ApiFuture<()> {
        let css = "margin:0;overflow:scroll;position:absolute;width:100%;height:100%";
        clone!(self.elem);
        ApiFuture::new(async move {
            let csv = view.to_csv(json!({})).await?.as_string().into_apierror()?;
            elem.style().set_property("background-color", "#fff")?;
            elem.set_inner_html(&format!("<pre style='{}'>{}</pre>", css, csv));
            Ok(())
        })
    }

    pub fn clear(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    pub fn resize(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    pub fn restyle(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    pub fn save(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    pub fn restore(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    pub fn delete(&self) -> ApiFuture<()> {
        ApiFuture::default()
    }

    #[wasm_bindgen(js_name = "connectedCallback")]
    pub fn connected_callback(&self) {}
}