/*************************************************************
 *
 *  Copyright (c) 2018 The MathJax Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @fileoverview  Implements the SVGmunderover wrapper for the MmlMunderover object
 *                and the special cases SVGmunder and SVGmsup
 *
 * @author dpvc@mathjax.org (Davide Cervone)
 */

import {SVGWrapper, SVGConstructor, Constructor} from '../Wrapper.js';
import {SVGscriptbase} from './scriptbase.js';
import {SVGmsubsup, SVGmsub, SVGmsup} from './msubsup.js';
import {CommonMunder, CommonMunderMixin} from '../../common/Wrappers/munderover.js';
import {CommonMover, CommonMoverMixin} from '../../common/Wrappers/munderover.js';
import {CommonMunderover, CommonMunderoverMixin} from '../../common/Wrappers/munderover.js';
import {MmlMunderover, MmlMunder, MmlMover} from '../../../core/MmlTree/MmlNodes/munderover.js';

/*****************************************************************/
/**
 * The SVGmunder wrapper for the MmlMunder object
 *
 * @template N  The HTMLElement node class
 * @template T  The Text node class
 * @template D  The Document class
 */
export class SVGmunder<N, T, D> extends
CommonMunderMixin<SVGWrapper<N, T, D>, Constructor<SVGmsub<N, T, D>>>(SVGmsub)  {

    public static kind = MmlMunder.prototype.kind;

    public static useIC: boolean = true;

    /**
     * @override
     */
    public toSVG(parent: N) {
        if (this.hasMovableLimits()) {
            super.toSVG(parent);
            return;
        }

        const svg = this.standardSVGnode(parent);
        const [base, script] = [this.baseChild, this.script];
        const [bbox, sbox] = [base.getBBox(), script.getBBox()];

        base.toSVG(svg);
        script.toSVG(svg);

        const delta = this.getDelta(true);
        const [k, v] = this.getUnderKV(bbox, sbox);
        const [bx, sx] = this.getDeltaW([bbox, sbox], [0, -delta]);

        base.place(bx, 0);
        script.place(sx, v);
    }

}

/*****************************************************************/
/**
 * The SVGmover wrapper for the MmlMover object
 *
 * @template N  The HTMLElement node class
 * @template T  The Text node class
 * @template D  The Document class
 */
export class SVGmover<N, T, D> extends
CommonMoverMixin<SVGWrapper<N, T, D>, Constructor<SVGmsup<N, T, D>>>(SVGmsup)  {

    public static kind = MmlMover.prototype.kind;

    public static useIC: boolean = true;

    /*
     * @override
     */
    public toSVG(parent: N) {
        if (this.hasMovableLimits()) {
            super.toSVG(parent);
            return;
        }
        const svg = this.standardSVGnode(parent);
        const [base, script] = [this.baseChild, this.script];
        const [bbox, sbox] = [base.getBBox(), script.getBBox()];

        base.toSVG(svg);
        script.toSVG(svg);

        const delta = this.getDelta();
        const [k, u] = this.getOverKU(bbox, sbox);
        const [bx, sx] = this.getDeltaW([bbox, sbox], [0, delta]);

        base.place(bx, 0);
        script.place(sx, u);
    }

}

/*****************************************************************/
/*
 * The SVGmunderover wrapper for the MmlMunderover object
 *
 * @template N  The HTMLElement node class
 * @template T  The Text node class
 * @template D  The Document class
 */
export class SVGmunderover<N, T, D> extends
CommonMunderoverMixin<SVGWrapper<N, T, D>, Constructor<SVGmsubsup<N, T, D>>>(SVGmsubsup)  {

    public static kind = MmlMunderover.prototype.kind;

    public static useIC: boolean = true;

    /*
     * @override
     */
    public toSVG(parent: N) {
        if (this.hasMovableLimits()) {
            super.toSVG(parent);
            return;
        }
        const svg = this.standardSVGnode(parent);
        const [base, over, under] = [this.baseChild, this.overChild, this.underChild];
        const [bbox, obox, ubox] = [base.getBBox(), over.getBBox(), under.getBBox()];

        base.toSVG(svg);
        under.toSVG(svg);
        over.toSVG(svg);

        const delta = this.getDelta();
        const [ok, u] = this.getOverKU(bbox, obox);
        const [uk, v] = this.getUnderKV(bbox, ubox);
        const [bx, ux, ox] = this.getDeltaW([bbox, ubox, obox], [0, -delta, delta]);

        base.place(bx, 0);
        under.place(ux, v);
        over.place(ox, u);
    }

}