Shared-Travel-Map-Front-End/node_modules/ionic-angular/components/slides/swiper/swiper-controller.js

import { fixLoop, onTransitionEnd, onTransitionStart } from './swiper';
import { updateActiveIndex } from './swiper-index';
import { isHorizontal, maxTranslate, minTranslate } from './swiper-utils';
import { updateProgress } from './swiper-progress';
/*=========================
  Controller
  ===========================*/
export var SWIPER_CONTROLLER = {
    LinearSpline: function (_s, _platform, x, y) {
        this.x = x;
        this.y = y;
        this.lastIndex = x.length - 1;
        // Given an x value (x2), return the expected y2 value:
        // (x1,y1) is the known point before given value,
        // (x3,y3) is the known point after given value.
        var i1, i3;
        this.interpolate = function (x2) {
            if (!x2)
                return 0;
            // Get the indexes of x1 and x3 (the array indexes before and after given x2):
            i3 = binarySearch(this.x, x2);
            i1 = i3 - 1;
            // We have our indexes i1 & i3, so we can calculate already:
            // y2 := ((x2−x1) × (y3−y1)) ÷ (x3−x1) + y1
            return ((x2 - this.x[i1]) * (this.y[i3] - this.y[i1])) / (this.x[i3] - this.x[i1]) + this.y[i1];
        };
        var binarySearch = (function () {
            var maxIndex, minIndex, guess;
            return function (array, val) {
                minIndex = -1;
                maxIndex = array.length;
                while (maxIndex - minIndex > 1)
                    if (array[guess = maxIndex + minIndex >> 1] <= val) {
                        minIndex = guess;
                    }
                    else {
                        maxIndex = guess;
                    }
                return maxIndex;
            };
        })();
    },
    // xxx: for now i will just save one spline function to to
    getInterpolateFunction: function (s, plt, c) {
        if (!s._spline)
            s._spline = s.loop ?
                new SWIPER_CONTROLLER.LinearSpline(s, plt, s._slidesGrid, c._slidesGrid) :
                new SWIPER_CONTROLLER.LinearSpline(s, plt, s._snapGrid, c._snapGrid);
    },
    setTranslate: function (s, plt, translate, byController, setWrapperTranslate) {
        var controlled = s.control;
        var multiplier, controlledTranslate;
        function setControlledTranslate(c) {
            // this will create an Interpolate function based on the snapGrids
            // x is the Grid of the scrolled scroller and y will be the controlled scroller
            // it makes sense to create this only once and recall it for the interpolation
            // the function does a lot of value caching for performance
            translate = c._rtl && isHorizontal(c) ? -s._translate : s._translate;
            if (s.controlBy === 'slide') {
                SWIPER_CONTROLLER.getInterpolateFunction(s, plt, c);
                // i am not sure why the values have to be multiplicated this way, tried to invert the snapGrid
                // but it did not work out
                controlledTranslate = -s._spline.interpolate(-translate);
            }
            if (!controlledTranslate || s.controlBy === 'container') {
                multiplier = (maxTranslate(c) - minTranslate(c)) / (maxTranslate(s) - minTranslate(s));
                controlledTranslate = (translate - minTranslate(s)) * multiplier + minTranslate(c);
            }
            if (s.controlInverse) {
                controlledTranslate = maxTranslate(c) - controlledTranslate;
            }
            updateProgress(c, controlledTranslate);
            setWrapperTranslate(c, plt, controlledTranslate, false, s);
            updateActiveIndex(c);
        }
        if (Array.isArray(controlled)) {
            for (var i = 0; i < controlled.length; i++) {
                if (controlled[i] !== byController) {
                    setControlledTranslate(controlled[i]);
                }
            }
        }
        else if (byController !== controlled) {
            setControlledTranslate(controlled);
        }
    },
    setTransition: function (s, plt, duration, byController, setWrapperTransition) {
        var controlled = s.control;
        var i;
        function setControlledTransition(c) {
            setWrapperTransition(c, plt, duration, s);
            if (duration !== 0) {
                onTransitionStart(c);
                plt.transitionEnd(c._wrapper, function () {
                    if (!controlled)
                        return;
                    if (c.loop && s.controlBy === 'slide') {
                        fixLoop(c, plt);
                    }
                    onTransitionEnd(c, plt);
                });
            }
        }
        if (Array.isArray(controlled)) {
            for (i = 0; i < controlled.length; i++) {
                if (controlled[i] !== byController) {
                    setControlledTransition(controlled[i]);
                }
            }
        }
        else if (byController !== controlled) {
            setControlledTransition(controlled);
        }
    }
};
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