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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const {
ADD_VIEWPORT,
CHANGE_DEVICE,
CHANGE_PIXEL_RATIO,
REMOVE_DEVICE,
RESIZE_VIEWPORT,
ROTATE_VIEWPORT,
} = require("../actions/index");
let nextViewportId = 0;
const INITIAL_VIEWPORTS = [];
const INITIAL_VIEWPORT = {
id: nextViewportId++,
device: "",
width: 320,
height: 480,
pixelRatio: {
value: 0,
},
};
let reducers = {
[ADD_VIEWPORT](viewports) {
// For the moment, there can be at most one viewport.
if (viewports.length === 1) {
return viewports;
}
return [...viewports, Object.assign({}, INITIAL_VIEWPORT)];
},
[CHANGE_DEVICE](viewports, { id, device }) {
return viewports.map(viewport => {
if (viewport.id !== id) {
return viewport;
}
return Object.assign({}, viewport, {
device,
});
});
},
[CHANGE_PIXEL_RATIO](viewports, { id, pixelRatio }) {
return viewports.map(viewport => {
if (viewport.id !== id) {
return viewport;
}
return Object.assign({}, viewport, {
pixelRatio: {
value: pixelRatio
},
});
});
},
[REMOVE_DEVICE](viewports, { id }) {
return viewports.map(viewport => {
if (viewport.id !== id) {
return viewport;
}
return Object.assign({}, viewport, {
device: "",
});
});
},
[RESIZE_VIEWPORT](viewports, { id, width, height }) {
return viewports.map(viewport => {
if (viewport.id !== id) {
return viewport;
}
if (!width) {
width = viewport.width;
}
if (!height) {
height = viewport.height;
}
return Object.assign({}, viewport, {
width,
height,
});
});
},
[ROTATE_VIEWPORT](viewports, { id }) {
return viewports.map(viewport => {
if (viewport.id !== id) {
return viewport;
}
return Object.assign({}, viewport, {
width: viewport.height,
height: viewport.width,
});
});
},
};
module.exports = function (viewports = INITIAL_VIEWPORTS, action) {
let reducer = reducers[action.type];
if (!reducer) {
return viewports;
}
return reducer(viewports, action);
};
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