Current File : /var/www/html/node_modules/swiper/modules/controller/controller.js
/* eslint no-bitwise: ["error", { "allow": [">>"] }] */
import { nextTick } from '../../shared/utils.js';
export default function Controller(_ref) {
let {
swiper,
extendParams,
on
} = _ref;
extendParams({
controller: {
control: undefined,
inverse: false,
by: 'slide' // or 'container'
}
});
swiper.controller = {
control: undefined
};
function LinearSpline(x, y) {
const binarySearch = function search() {
let maxIndex;
let minIndex;
let guess;
return (array, val) => {
minIndex = -1;
maxIndex = array.length;
while (maxIndex - minIndex > 1) {
guess = maxIndex + minIndex >> 1;
if (array[guess] <= val) {
minIndex = guess;
} else {
maxIndex = guess;
}
}
return maxIndex;
};
}();
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.
let i1;
let i3;
this.interpolate = function interpolate(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];
};
return this;
} // xxx: for now i will just save one spline function to to
function getInterpolateFunction(c) {
if (!swiper.controller.spline) {
swiper.controller.spline = swiper.params.loop ? new LinearSpline(swiper.slidesGrid, c.slidesGrid) : new LinearSpline(swiper.snapGrid, c.snapGrid);
}
}
function setTranslate(_t, byController) {
const controlled = swiper.controller.control;
let multiplier;
let controlledTranslate;
const Swiper = swiper.constructor;
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
const translate = swiper.rtlTranslate ? -swiper.translate : swiper.translate;
if (swiper.params.controller.by === 'slide') {
getInterpolateFunction(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 = -swiper.controller.spline.interpolate(-translate);
}
if (!controlledTranslate || swiper.params.controller.by === 'container') {
multiplier = (c.maxTranslate() - c.minTranslate()) / (swiper.maxTranslate() - swiper.minTranslate());
controlledTranslate = (translate - swiper.minTranslate()) * multiplier + c.minTranslate();
}
if (swiper.params.controller.inverse) {
controlledTranslate = c.maxTranslate() - controlledTranslate;
}
c.updateProgress(controlledTranslate);
c.setTranslate(controlledTranslate, swiper);
c.updateActiveIndex();
c.updateSlidesClasses();
}
if (Array.isArray(controlled)) {
for (let i = 0; i < controlled.length; i += 1) {
if (controlled[i] !== byController && controlled[i] instanceof Swiper) {
setControlledTranslate(controlled[i]);
}
}
} else if (controlled instanceof Swiper && byController !== controlled) {
setControlledTranslate(controlled);
}
}
function setTransition(duration, byController) {
const Swiper = swiper.constructor;
const controlled = swiper.controller.control;
let i;
function setControlledTransition(c) {
c.setTransition(duration, swiper);
if (duration !== 0) {
c.transitionStart();
if (c.params.autoHeight) {
nextTick(() => {
c.updateAutoHeight();
});
}
c.$wrapperEl.transitionEnd(() => {
if (!controlled) return;
if (c.params.loop && swiper.params.controller.by === 'slide') {
c.loopFix();
}
c.transitionEnd();
});
}
}
if (Array.isArray(controlled)) {
for (i = 0; i < controlled.length; i += 1) {
if (controlled[i] !== byController && controlled[i] instanceof Swiper) {
setControlledTransition(controlled[i]);
}
}
} else if (controlled instanceof Swiper && byController !== controlled) {
setControlledTransition(controlled);
}
}
function removeSpline() {
if (!swiper.controller.control) return;
if (swiper.controller.spline) {
swiper.controller.spline = undefined;
delete swiper.controller.spline;
}
}
on('beforeInit', () => {
swiper.controller.control = swiper.params.controller.control;
});
on('update', () => {
removeSpline();
});
on('resize', () => {
removeSpline();
});
on('observerUpdate', () => {
removeSpline();
});
on('setTranslate', (_s, translate, byController) => {
if (!swiper.controller.control) return;
swiper.controller.setTranslate(translate, byController);
});
on('setTransition', (_s, duration, byController) => {
if (!swiper.controller.control) return;
swiper.controller.setTransition(duration, byController);
});
Object.assign(swiper.controller, {
setTranslate,
setTransition
});
}
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