tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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selection.js (2060B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 "use strict";
      6 
      7 const {
      8  SELECT_REQUEST,
      9 } = require("resource://devtools/client/netmonitor/src/constants.js");
     10 const {
     11  getDisplayedRequests,
     12  getSortedRequests,
     13 } = require("resource://devtools/client/netmonitor/src/selectors/index.js");
     14 
     15 const PAGE_SIZE_ITEM_COUNT_RATIO = 5;
     16 
     17 /**
     18 * Select request with a given id.
     19 */
     20 function selectRequest(id, request) {
     21  return {
     22    type: SELECT_REQUEST,
     23    id,
     24    request,
     25  };
     26 }
     27 
     28 /**
     29 * Select request with a given index (sorted order)
     30 */
     31 function selectRequestByIndex(index) {
     32  return ({ dispatch, getState }) => {
     33    const requests = getSortedRequests(getState());
     34    let itemId;
     35    if (index >= 0 && index < requests.length) {
     36      itemId = requests[index].id;
     37    }
     38    dispatch(selectRequest(itemId));
     39  };
     40 }
     41 
     42 /**
     43 * Move the selection up to down according to the "delta" parameter. Possible values:
     44 * - Number: positive or negative, move up or down by specified distance
     45 * - "PAGE_UP" | "PAGE_DOWN" (String): page up or page down
     46 * - +Infinity | -Infinity: move to the start or end of the list
     47 */
     48 function selectDelta(delta) {
     49  return ({ dispatch, getState }) => {
     50    const state = getState();
     51    const requests = getDisplayedRequests(state);
     52 
     53    if (!requests.length) {
     54      return;
     55    }
     56 
     57    const selIndex = requests.findIndex(
     58      r => r.id === state.requests.selectedId
     59    );
     60 
     61    if (delta === "PAGE_DOWN") {
     62      delta = Math.ceil(requests.length / PAGE_SIZE_ITEM_COUNT_RATIO);
     63    } else if (delta === "PAGE_UP") {
     64      delta = -Math.ceil(requests.length / PAGE_SIZE_ITEM_COUNT_RATIO);
     65    }
     66 
     67    const newIndex = Math.min(
     68      Math.max(0, selIndex + delta),
     69      requests.length - 1
     70    );
     71    const newItem = requests[newIndex];
     72    dispatch(selectRequest(newItem.id, newItem));
     73  };
     74 }
     75 
     76 module.exports = {
     77  selectRequest,
     78  selectRequestByIndex,
     79  selectDelta,
     80 };