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 std::rc::Rc;

use yew::prelude::*;

use super::containers::dropdown_menu::*;
use super::modal::{ModalLink, SetModalLink};
use super::style::StyleProvider;
use crate::model::*;
use crate::renderer::*;
use crate::utils::*;
use crate::*;

pub type ExportDropDownMenuItem = DropDownMenuItem<ExportFile>;

#[derive(Properties, PartialEq)]
pub struct ExportDropDownMenuProps {
    pub renderer: Renderer,
    pub callback: Callback<ExportFile>,

    #[prop_or_default]
    weak_link: WeakScope<ExportDropDownMenu>,
}

impl ModalLink<ExportDropDownMenu> for ExportDropDownMenuProps {
    fn weak_link(&self) -> &'_ utils::WeakScope<ExportDropDownMenu> {
        &self.weak_link
    }
}

#[derive(Default)]
pub struct ExportDropDownMenu {
    title: String,
    _sub: Option<Subscription>,
    input_ref: NodeRef,
    invalid: bool,
}

pub enum ExportDropDownMenuMsg {
    TitleChange,
}

fn get_menu_items(name: &str, has_render: bool) -> Vec<ExportDropDownMenuItem> {
    vec![
        ExportDropDownMenuItem::OptGroup(
            "Current View".into(),
            if has_render {
                vec![
                    ExportMethod::Csv.new_file(name),
                    ExportMethod::Json.new_file(name),
                    ExportMethod::Arrow.new_file(name),
                    ExportMethod::Html.new_file(name),
                    ExportMethod::Png.new_file(name),
                ]
            } else {
                vec![
                    ExportMethod::Csv.new_file(name),
                    ExportMethod::Json.new_file(name),
                    ExportMethod::Arrow.new_file(name),
                    ExportMethod::Html.new_file(name),
                ]
            },
        ),
        ExportDropDownMenuItem::OptGroup("All".into(), vec![
            ExportMethod::CsvAll.new_file(name),
            ExportMethod::JsonAll.new_file(name),
            ExportMethod::ArrowAll.new_file(name),
        ]),
        ExportDropDownMenuItem::OptGroup("Config".into(), vec![
            ExportMethod::JsonConfig.new_file(name)
        ]),
    ]
}

impl Component for ExportDropDownMenu {
    type Message = ExportDropDownMenuMsg;
    type Properties = ExportDropDownMenuProps;

    fn view(&self, ctx: &Context<Self>) -> yew::virtual_dom::VNode {
        let callback = ctx.link().callback(|_| ExportDropDownMenuMsg::TitleChange);
        let plugin = ctx.props().renderer.get_active_plugin().unwrap();
        let has_render = js_sys::Reflect::has(&plugin, js_intern::js_intern!("render")).unwrap();
        html! {
            <StyleProvider>
                <span class="dropdown-group-label">{ "Save as" }</span>
                <input
                    class={ if self.invalid { "invalid" } else { "" }}
                    oninput={ callback }
                    ref={ &self.input_ref }
                    value={ self.title.to_owned() } />
                <DropDownMenu<ExportFile>
                    values={ Rc::new(get_menu_items(&self.title, has_render)) }
                    callback={ &ctx.props().callback }>
                </DropDownMenu<ExportFile>>
            </StyleProvider>
        }
    }

    fn update(&mut self, _ctx: &Context<Self>, msg: Self::Message) -> bool {
        match msg {
            ExportDropDownMenuMsg::TitleChange => {
                self.title = self
                    .input_ref
                    .cast::<web_sys::HtmlInputElement>()
                    .unwrap()
                    .value();

                self.invalid = self.title.is_empty();
                true
            }
        }
    }

    fn create(ctx: &Context<Self>) -> Self {
        ctx.set_modal_link();
        let _sub = Some(
            ctx.props()
                .renderer
                .plugin_changed
                .add_listener(ctx.link().callback(|_| ExportDropDownMenuMsg::TitleChange)),
        );

        Self {
            title: "untitled".to_owned(),
            _sub,
            ..Default::default()
        }
    }
}