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import { action, IReactionDisposer, reaction } from "mobx";
import { baseKeymap } from "prosemirror-commands";
import { history, redo, undo } from "prosemirror-history";
import { keymap } from "prosemirror-keymap";
import { EditorState, Transaction, NodeSelection } from "prosemirror-state";
import { EditorView } from "prosemirror-view";
import { schema } from "./RichTextSchema";
import { Schema, NodeType } from "prosemirror-model";
import React = require("react");
import "./TooltipTextMenu.scss";
const { toggleMark, setBlockType, wrapIn } = require("prosemirror-commands");
import { library } from '@fortawesome/fontawesome-svg-core';
import { wrapInList, bulletList } from 'prosemirror-schema-list';
import { faListUl } from '@fortawesome/free-solid-svg-icons';
import { FieldViewProps } from "../views/nodes/FieldView";
import { throwStatement } from "babel-types";
//appears above a selection of text in a RichTextBox to give user options such as Bold, Italics, etc.
export class TooltipTextMenu {
private tooltip: HTMLElement;
private editorProps: FieldViewProps;
constructor(view: EditorView, editorProps: FieldViewProps) {
this.editorProps = editorProps;
this.tooltip = document.createElement("div");
this.tooltip.className = "tooltipMenu";
//add the div which is the tooltip
view.dom.parentNode!.parentNode!.appendChild(this.tooltip);
//add additional icons
library.add(faListUl);
//add the buttons to the tooltip
let items = [
{ command: toggleMark(schema.marks.strong), dom: this.icon("B", "strong") },
{ command: toggleMark(schema.marks.em), dom: this.icon("i", "em") },
{ command: toggleMark(schema.marks.underline), dom: this.icon("U", "underline") },
{ command: toggleMark(schema.marks.strikethrough), dom: this.icon("S", "strikethrough") },
{ command: toggleMark(schema.marks.superscript), dom: this.icon("s", "superscript") },
{ command: toggleMark(schema.marks.subscript), dom: this.icon("s", "subscript") },
//this doesn't work currently - look into notion of active block
{ command: wrapInList(schema.nodes.bullet_list), dom: this.icon(":", "bullets") },
];
items.forEach(({ dom }) => this.tooltip.appendChild(dom));
//pointer down handler to activate button effects
this.tooltip.addEventListener("pointerdown", e => {
e.preventDefault();
view.focus();
items.forEach(({ command, dom }) => {
if (dom.contains(e.target as Node)) {
let active = command(view.state, view.dispatch, view);
//uncomment this if we want the bullet button to disappear if current selection is bulleted
// dom.style.display = active ? "" : "none"
}
});
});
this.update(view, undefined);
}
// Helper function to create menu icons
icon(text: string, name: string) {
let span = document.createElement("span");
span.className = "menuicon " + name;
span.title = name;
span.textContent = text;
return span;
}
//adapted this method - use it to check if block has a tag (ie bulleting)
blockActive(type: NodeType<Schema<string, string>>, state: EditorState) {
let attrs = {};
if (state.selection instanceof NodeSelection) {
const sel: NodeSelection = state.selection;
let $from = sel.$from;
let to = sel.to;
let node = sel.node;
if (node) {
return node.hasMarkup(type, attrs);
}
return to <= $from.end() && $from.parent.hasMarkup(type, attrs);
}
}
//this doesn't currently work but could be used to use icons for buttons
unorderedListIcon(): HTMLSpanElement {
let span = document.createElement("span");
let icon = document.createElement("FontAwesomeIcon");
icon.className = "menuicon fa fa-smile-o";
span.appendChild(icon);
return span;
}
// Create an icon for a heading at the given level
heading(level: number) {
return {
command: setBlockType(schema.nodes.heading, { level }),
dom: this.icon("H" + level, "heading")
};
}
//updates the tooltip menu when the selection changes
update(view: EditorView, lastState: EditorState | undefined) {
let state = view.state;
// Don't do anything if the document/selection didn't change
if (lastState && lastState.doc.eq(state.doc) &&
lastState.selection.eq(state.selection)) return;
// Hide the tooltip if the selection is empty
if (state.selection.empty) {
this.tooltip.style.display = "none";
return;
}
// Otherwise, reposition it and update its content
this.tooltip.style.display = "";
let { from, to } = state.selection;
let start = view.coordsAtPos(from), end = view.coordsAtPos(to);
// The box in which the tooltip is positioned, to use as base
let box = this.tooltip.offsetParent!.getBoundingClientRect();
// Find a center-ish x position from the selection endpoints (when
// crossing lines, end may be more to the left)
let left = Math.max((start.left + end.left) / 2, start.left + 3);
this.tooltip.style.left = (left - box.left) * this.editorProps.ScreenToLocalTransform().Scale + "px";
let width = Math.abs(start.left - end.left) / 2 * this.editorProps.ScreenToLocalTransform().Scale;
let mid = Math.min(start.left, end.left) + width;
//THIS WIDTH IS 15 * NUMBER OF ICONS + 15
this.tooltip.style.width = 122 + "px";
this.tooltip.style.bottom = (box.bottom - start.top) * this.editorProps.ScreenToLocalTransform().Scale + "px";
}
destroy() { this.tooltip.remove(); }
}
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