searxng/searx/static/themes/simple/js/searx_src/searx_keyboard.js
2017-08-06 16:04:21 +02:00

361 lines
9.1 KiB
JavaScript

searx.ready(function() {
searx.on('.result', 'click', function() {
highlightResult(this)(true);
});
searx.on('.result a', 'focus', function(e) {
var el = e.target;
while (el !== undefined) {
if (el.classList.contains('result')) {
if (el.getAttribute("data-vim-selected") === null) {
highlightResult(el)(true);
}
break;
}
el = el.parentNode;
}
}, true);
var vimKeys = {
27: {
key: 'Escape',
fun: removeFocus,
des: 'remove focus from the focused input',
cat: 'Control'
},
73: {
key: 'i',
fun: searchInputFocus,
des: 'focus on the search input',
cat: 'Control'
},
66: {
key: 'b',
fun: scrollPage(-window.innerHeight),
des: 'scroll one page up',
cat: 'Navigation'
},
70: {
key: 'f',
fun: scrollPage(window.innerHeight),
des: 'scroll one page down',
cat: 'Navigation'
},
85: {
key: 'u',
fun: scrollPage(-window.innerHeight / 2),
des: 'scroll half a page up',
cat: 'Navigation'
},
68: {
key: 'd',
fun: scrollPage(window.innerHeight / 2),
des: 'scroll half a page down',
cat: 'Navigation'
},
71: {
key: 'g',
fun: scrollPageTo(-document.body.scrollHeight, 'top'),
des: 'scroll to the top of the page',
cat: 'Navigation'
},
86: {
key: 'v',
fun: scrollPageTo(document.body.scrollHeight, 'bottom'),
des: 'scroll to the bottom of the page',
cat: 'Navigation'
},
75: {
key: 'k',
fun: highlightResult('up'),
des: 'select previous search result',
cat: 'Results'
},
74: {
key: 'j',
fun: highlightResult('down'),
des: 'select next search result',
cat: 'Results'
},
80: {
key: 'p',
fun: pageButtonClick(0),
des: 'go to previous page',
cat: 'Results'
},
78: {
key: 'n',
fun: pageButtonClick(1),
des: 'go to next page',
cat: 'Results'
},
79: {
key: 'o',
fun: openResult(false),
des: 'open search result',
cat: 'Results'
},
84: {
key: 't',
fun: openResult(true),
des: 'open the result in a new tab',
cat: 'Results'
},
82: {
key: 'r',
fun: reloadPage,
des: 'reload page from the server',
cat: 'Control'
},
72: {
key: 'h',
fun: toggleHelp,
des: 'toggle help window',
cat: 'Other'
}
};
searx.on(document, "keyup", function(e) {
// check for modifiers so we don't break browser's hotkeys
if (vimKeys.hasOwnProperty(e.keyCode) && !e.ctrlKey && !e.altKey && !e.shiftKey && !e.metaKey) {
var tagName = e.target.tagName.toLowerCase();
if (e.keyCode === 27) {
if (tagName === 'input' || tagName === 'select' || tagName === 'textarea') {
vimKeys[e.keyCode].fun();
}
} else {
if (e.target === document.body || tagName === 'a' || tagName === 'button') {
vimKeys[e.keyCode].fun();
}
}
}
});
function highlightResult(which) {
return function(noScroll) {
var current = document.querySelector('.result[data-vim-selected]'),
effectiveWhich = which;
if (current === null) {
// no selection : choose the first one
current = document.querySelector('.result');
if (current === null) {
// no first one : there are no results
return;
}
// replace up/down actions by selecting first one
if (which === "down" || which === "up") {
effectiveWhich = current;
}
}
var next, results = document.querySelectorAll('.result');
if (typeof effectiveWhich !== 'string') {
next = effectiveWhich;
} else {
switch (effectiveWhich) {
case 'visible':
var top = document.documentElement.scrollTop || document.body.scrollTop;
var bot = top + document.documentElement.clientHeight;
for (var i = 0; i < results.length; i++) {
next = results[i];
var etop = next.offsetTop;
var ebot = etop + next.clientHeight;
if ((ebot <= bot) && (etop > top)) {
break;
}
}
break;
case 'down':
next = current.nextElementSibling;
if (next === null) {
next = results[0];
}
break;
case 'up':
next = current.previousElementSibling;
if (next === null) {
next = results[results.length - 1];
}
break;
case 'bottom':
next = results[results.length - 1];
break;
case 'top':
/* falls through */
default:
next = results[0];
}
}
if (next) {
current.removeAttribute('data-vim-selected');
next.setAttribute('data-vim-selected', 'true');
var link = next.querySelector('h3 a') || next.querySelector('a');
if (link !== null) {
link.focus();
}
if (!noScroll) {
scrollPageToSelected();
}
}
};
}
function reloadPage() {
document.location.reload(true);
}
function removeFocus() {
if (document.activeElement) {
document.activeElement.blur();
}
}
function pageButtonClick(num) {
return function() {
var buttons = $('div#pagination button[type="submit"]');
if (buttons.length !== 2) {
console.log('page navigation with this theme is not supported');
return;
}
if (num >= 0 && num < buttons.length) {
buttons[num].click();
} else {
console.log('pageButtonClick(): invalid argument');
}
};
}
function scrollPageToSelected() {
var sel = document.querySelector('.result[data-vim-selected]');
if (sel === null) {
return;
}
var wtop = document.documentElement.scrollTop || document.body.scrollTop,
wheight = document.documentElement.clientHeight,
etop = sel.offsetTop,
ebot = etop + sel.clientHeight,
offset = 120;
// first element ?
if ((sel.previousElementSibling === null) && (ebot < wheight)) {
// set to the top of page if the first element
// is fully included in the viewport
window.scroll(window.scrollX, 0);
return;
}
if (wtop > (etop - offset)) {
window.scroll(window.scrollX, etop - offset);
} else {
var wbot = wtop + wheight;
if (wbot < (ebot + offset)) {
window.scroll(window.scrollX, ebot - wheight + offset);
}
}
}
function scrollPage(amount) {
return function() {
window.scrollBy(0, amount);
highlightResult('visible')();
};
}
function scrollPageTo(position, nav) {
return function() {
window.scrollTo(0, position);
highlightResult(nav)();
};
}
function searchInputFocus() {
window.scrollTo(0, 0);
document.querySelector('#q').focus();
}
function openResult(newTab) {
return function() {
var link = document.querySelector('.result[data-vim-selected] h3 a');
if (link !== null) {
var url = link.getAttribute('href');
if (newTab) {
window.open(url);
} else {
window.location.href = url;
}
}
};
}
function toggleHelp() {
var helpPanel = document.querySelector('#vim-hotkeys-help');
if (helpPanel.length) {
helpPanel.classList.toggle('hidden');
return;
}
var categories = {};
for (var k in vimKeys) {
var key = vimKeys[k];
categories[key.cat] = categories[key.cat] || [];
categories[key.cat].push(key);
}
var sorted = Object.keys(categories).sort(function(a, b) {
return categories[b].length - categories[a].length;
});
if (sorted.length === 0) {
return;
}
var html = '<div id="vim-hotkeys-help" class="well vim-hotkeys-help">';
html += '<div class="container-fluid">';
html += '<div class="row">';
html += '<div class="col-sm-12">';
html += '<h3>How to navigate searx with Vim-like hotkeys</h3>';
html += '</div>'; // col-sm-12
html += '</div>'; // row
for (var i = 0; i < sorted.length; i++) {
var cat = categories[sorted[i]];
var lastCategory = i === (sorted.length - 1);
var first = i % 2 === 0;
if (first) {
html += '<div class="row dflex">';
}
html += '<div class="col-sm-' + (first && lastCategory ? 12 : 6) + ' dflex">';
html += '<div class="panel panel-default iflex">';
html += '<div class="panel-heading">' + cat[0].cat + '</div>';
html += '<div class="panel-body">';
html += '<ul class="list-unstyled">';
for (var cj in cat) {
html += '<li><kbd>' + cat[cj].key + '</kbd> ' + cat[cj].des + '</li>';
}
html += '</ul>';
html += '</div>'; // panel-body
html += '</div>'; // panel
html += '</div>'; // col-sm-*
if (!first || lastCategory) {
html += '</div>'; // row
}
}
html += '</div>'; // container-fluid
html += '</div>'; // vim-hotkeys-help
$('body').append(html);
}
});