perspective-viewer 5.6.1

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// ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
// ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
// ┃ This file is part of the Perspective library, distributed under the terms ┃
// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
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use perspective_client::config::ColumnType;
use web_sys::*;
use yew::prelude::*;

use super::expr_edit_button::*;
use crate::components::dragdrop_list::*;
use crate::components::type_icon::TypeIcon;
use crate::presentation::{ColumnSettingsTarget, Presentation};
use crate::session::*;
use crate::utils::*;

#[derive(Properties)]
pub struct PivotColumnProps {
    /// Column name.
    pub column: String,

    #[prop_or_default]
    pub column_type: Option<ColumnType>,

    /// The drag starte of this column, if applicable.
    pub action: DragTarget,

    /// Session metadata snapshot — threaded from `SessionProps`.
    #[prop_or_default]
    pub metadata: Option<SessionMetadataRc>,

    /// Opens this column's settings, when the host offers them.
    #[prop_or_default]
    pub on_open_expr_panel: Option<Callback<ColumnSettingsTarget>>,

    /// Is this column's settings panel open?
    #[prop_or_default]
    pub is_editing: bool,

    // State
    #[prop_or_default]
    pub opt_session: Option<Session>,
    pub presentation: Presentation,
}

impl PartialEq for PivotColumnProps {
    fn eq(&self, other: &Self) -> bool {
        self.column == other.column
            && self.action == other.action
            && self.metadata == other.metadata
            && self.is_editing == other.is_editing
            && self.on_open_expr_panel.is_some() == other.on_open_expr_panel.is_some()
    }
}

impl DragDropListItemProps for PivotColumnProps {
    type Item = String;

    fn get_item(&self) -> String {
        self.column.clone()
    }
}

pub struct PivotColumn;

impl Component for PivotColumn {
    type Message = ();
    type Properties = PivotColumnProps;

    fn create(_ctx: &Context<Self>) -> Self {
        Self
    }

    fn view(&self, ctx: &Context<Self>) -> Html {
        let dragstart = Callback::from({
            let event_name = ctx.props().column.to_owned();
            let presentation = ctx.props().presentation.clone();
            let action = ctx.props().action;
            move |event: DragEvent| {
                if presentation.set_drag_image(&event) {
                    presentation.notify_drag_start(event_name.to_string(), DragEffect::Move(action))
                }
            }
        });

        let dragend = Callback::from({
            let presentation = ctx.props().presentation.clone();
            move |_event| presentation.notify_drag_end()
        });

        let col_type = ctx.props().column_type.unwrap_or_else(|| {
            ctx.props()
                .metadata
                .as_ref()
                .and_then(|x| x.get_column_table_type(&ctx.props().column))
                .unwrap_or(ColumnType::Integer)
        });

        html! {
            <div
                class="pivot-column-draggable"
                draggable="true"
                ondragstart={dragstart}
                ondragend={dragend}
            >
                <div class="pivot-column-border">
                    <span class="drag-handle icon" />
                    <TypeIcon ty={col_type} />
                    <span class="column_name">{ ctx.props().column.clone() }</span>
                    if let Some(on_open_expr_panel) = &ctx.props().on_open_expr_panel {
                        <ExprEditButton
                            name={ctx.props().column.clone()}
                            {on_open_expr_panel}
                            is_expression=false
                            is_disabled=false
                            is_editing={ctx.props().is_editing}
                        />
                    }
                </div>
            </div>
        }
    }
}