609 lines
12 KiB
JavaScript
609 lines
12 KiB
JavaScript
var threadregexp = /(?:^| - )(\[[^\]]*\]):/;
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var colors = ["#ffa", "#aaf", "#afa", "#aff", "#faf", "#aaa", "#fd8", "#f80", "#4df", "#4fc", "#76973c", "#7e56d8", "#99593d", "#37778a", "#4068fc"];
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var screenlines = 1;
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var file = null;
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var text;
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var current, nextFilterId = 1;
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var shl = null;
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var hl = [];
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var groupwith = false;
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var filterswitch = true;
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var selectedlineid = -1;
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var selectedthread = null;
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var reachedbottom = false;
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var reachedtop = false;
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function wheelscroll(event)
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{
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renderincremental(event.deltaY);
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}
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function keypress(event)
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{
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if (event.key == "PageDown") {
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_render(screenlines - 1);
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event.preventDefault();
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}
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if (event.key == "PageUp") {
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_render(-(screenlines - 1));
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event.preventDefault();
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}
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if (event.key == "Home" && event.ctrlKey) {
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selectedlineid = 0;
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render();
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event.preventDefault();
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}
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if (event.key == "End" && event.ctrlKey) {
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selectedlineid = text.length - 1;
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render();
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event.preventDefault();
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}
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if (event.key == "ArrowUp") {
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renderincremental(-1);
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event.preventDefault();
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}
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if (event.key == "ArrowDown") {
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renderincremental(1);
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event.preventDefault();
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}
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}
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function init(filename) {
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document.addEventListener("wheel", wheelscroll, false);
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document.addEventListener("keypress", keypress, false);
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window.addEventListener("resize", resize, false);
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_resize();
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var s = document.getElementById("search");
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s.value = "";
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selectfilter(0);
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reload(filename);
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}
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function _resize()
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{
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var d = document.getElementById("renderer");
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var t = document.getElementById("toobar");
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screenlines = Math.floor((window.innerHeight - t.offsetHeight) / d.firstChild.offsetHeight) - 1;
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}
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function resize()
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{
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_resize();
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repaint();
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}
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function reload(filename)
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{
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if (shl) shl.cache = {};
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for (_hl of hl) _hl.cache = {};
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var q = filename;
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document.title = "Log: " + (q || "none loaded");
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if (!q)
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return;
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var d = document.getElementById("renderer");
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d.innerHTML = "loading " + q + "...";
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var r = new XMLHttpRequest();
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r.open("GET", "/ajax/accesslog", true);
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r.responseType = 'text';
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r.onload = function() {
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console.log("prepare");
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prepare(r.responseText);
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if (selectedlineid > text.length) {
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selectedlineid = -1;
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}
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console.log("render");
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render();
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};
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r.send();
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}
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function _sanitize(t)
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{
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t = t
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.replace(/&/g, "&")
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.replace(/ /g, " ")
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.replace(/</g, "<")
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.replace(/>/g, ">");
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return t;
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}
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function _prepare(t)
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{
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// sanitization happens in render, since otherwise it eats enormous amount of memory.
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/*
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var t = t.split('\n');
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for (var i in t) {
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t[i] = _sanitize(t[i]);
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}
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return t;
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*/
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return /*_sanitize*/(t).split('\n');
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}
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function prepare(t)
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{
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text = _prepare(t);
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}
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function render()
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{
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_render(0, false); // completely redraws the view from the current scroll position
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}
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function repaint()
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{
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_render(0, true); // completely redraws the view, but centers the selected line
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}
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function renderincremental(difference)
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{
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_render(difference); // "scrolls" the view
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}
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function _render(increment, repaintonly)
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{
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var epoch = new Date();
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var d = document.getElementById("renderer");
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var filter = _gfilteron();
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function process(i, append)
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{
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var t = _sanitize(text[i]);
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var lhl = false;
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function dohl(_hl)
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{
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if (_hl.cache[i] === false) {
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// lhl is here unaffected
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return t;
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}
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var t2 = t.replace(new RegExp("(" + _hl.text_r + ")", "g"), "<span style='background-color:" + _hl.color + ";'>$1</span>");
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var affecting = (t != t2);
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_hl.cache[i] = affecting;
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lhl = lhl || (affecting && (!filter || _hl.filter));
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return t2;
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}
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for (var h in hl)
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t = dohl(hl[h]);
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if (shl)
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t = dohl(shl);
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if (filter && !lhl && i != selectedlineid) {
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return false;
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}
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lhl = lhl && !filter;
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var div = document.createElement("div");
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div.id = i;
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if (lhl) div.className = 'lhl';
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div.onclick = function() { selectline(this); };
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div.innerHTML = t;
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if (t.match(new RegExp(selectedthread, "g"))) div.className += ' thread';
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if (append)
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d.appendChild(div);
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else
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d.insertBefore(div, d.firstChild);
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return true;
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}
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var lefttodraw = Math.floor(Math.abs(increment));
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if (increment < 0) {
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// scroll up
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reachedbottom = false;
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if (reachedtop) {
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_hint("reached top of the file");
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return;
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}
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for (var i = parseInt(d.firstChild.id) - 1; lefttodraw && i >= 0 && i < text.length; --i) {
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if (process(i, false)) {
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--lefttodraw;
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if (d.childNodes.length > screenlines)
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d.removeChild(d.lastChild);
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}
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}
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if (lefttodraw) {
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_hint("reached top of the file");
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reachedtop = true;
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}
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} else if (increment > 0) {
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// scroll down
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reachedtop = false;
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if (reachedbottom) {
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_hint("reached bottom of the file");
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return;
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}
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for (var i = parseInt(d.lastChild.id) + 1; lefttodraw && i < text.length; ++i) {
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if (process(i, true)) {
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--lefttodraw;
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if (d.childNodes.length > screenlines)
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d.removeChild(d.firstChild);
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}
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}
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if (lefttodraw) {
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_hint("reached bottom of the file");
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reachedbottom = true;
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}
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} else { // == 0
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// redraw all
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reachedbottom = false;
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reachedtop = false;
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lefttodraw = screenlines;
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var i = repaintonly ? parseInt(d.firstChild.id) : selectedlineid;
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if (i < 0) i = 0;
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d.innerHTML = "";
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for (; lefttodraw && i < text.length; ++i) {
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if (process(i, true)) {
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--lefttodraw;
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}
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}
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if (!repaintonly && selectedlineid > -1) {
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// center the selected line in the middle of screen!
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_render(-(screenlines / 2));
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}
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}
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selectline(selectedlineid);
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var now = new Date();
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console.log("rendered in " + (now.getTime() - epoch.getTime()) + "ms");
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var pos = document.getElementById("position");
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pos.textContent = Math.round((parseInt(d.firstChild.id) / text.length) * 1000) / 10 + "%";
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}
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function _hint(h)
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{
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document.getElementById("hint").innerHTML = h;
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}
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function _gfilteron()
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{
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if (!filterswitch)
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return false;
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if (shl && shl.filter)
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return true;
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for (var h in hl)
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{
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if (hl[h].filter)
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return true;
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}
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return false;
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}
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function _getfilterelement(filter)
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{
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if (filter == 0)
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return document.getElementById("search");
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return document.getElementById("filter" + filter);
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}
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function _setfilterelementstate(p0, _hl)
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{
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p0.style.textDecoration = _hl.filter ? "underline" : "";
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}
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function _triminput(t)
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{
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t = t
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.replace(/^\s+/, "")
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.replace(/\s+$/, "")
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;
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return t;
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}
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function _regexpescape(t)
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{
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t = t
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.replace(/\\/g, "\\\\")
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.replace(/\?/g, "\\?")
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.replace(/\./g, "\\.")
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.replace(/\+/g, "\\+")
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.replace(/\*/g, "\\*")
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.replace(/\^/g, "\\^")
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.replace(/\$/g, "\\$")
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.replace(/\(/g, "\\(")
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.replace(/\)/g, "\\)")
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.replace(/\[/g, "\\[")
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.replace(/\]/g, "\\]")
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.replace(/\|/g, "\\|")
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;
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return t;
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}
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function resetuistate()
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{
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groupwith = false;
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_hint("");
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}
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function newhl(t, p, persistent)
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{
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return {
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id: persistent ? nextFilterId++ : 0,
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text: t,
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text_r: _sanitize(_regexpescape(t)),
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color: p ? p.color : colors[0],
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filter: p ? p.filter : false,
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cache: {}
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};
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}
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function selectline(id)
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{
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var l0 = document.getElementById(selectedlineid);
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if (l0)
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l0.style.backgroundColor = "";
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var l1 = null;
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if (typeof(id) == "object") {
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l1 = id;
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id = parseInt(l1.id);
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} else {
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l1 = document.getElementById(id);
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}
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selectedlineid = id;
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if (selectedlineid > -1)
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_hint("line # " + (selectedlineid + 1));
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if (l1) {
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l1.style.background = "#faa";
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}
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var thread = null;
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var m = text[selectedlineid].match(threadregexp);
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if (m) thread = _regexpescape(_sanitize(m[1]));
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if (thread != selectedthread) {
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selectedthread = thread;
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repaint();
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}
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return l1;
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}
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function mouseup(event)
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{
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if (event.ctrlKey)
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return;
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resetuistate();
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var s = window.getSelection();
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var t = _triminput(s.toString());
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if (!t)
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return;
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s = document.getElementById("search");
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s.value = t;
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t = _prepare(t)[0];
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shl = newhl(t, shl);
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selectfilter(0);
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repaint();
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}
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function persist()
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{
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resetuistate();
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var dorender = false;
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if (!shl)
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{
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_apply();
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dorender = true;
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}
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if (!shl)
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return;
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selectfilter(0);
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var _hl = newhl(shl.text, shl, true);
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_hl.cache = shl.cache; // hope this is right, shl is updated in _apply, that always creates an empty cache
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hl.push(_hl);
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var p = document.getElementById("persistents");
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var p0 = document.createElement("div");
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p0.id = "filter" + _hl.id;
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p0.className = "persistent";
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p0.style.backgroundColor = _hl.color;
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p0.innerHTML = _hl.text;
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p0.onclick = function() {selectfilter(_hl.id)};
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_setfilterelementstate(p0, _hl);
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p.appendChild(p0);
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_restartshl();
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selectfilter(_hl.id);
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if (dorender)
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render();
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colors.push(colors.shift());
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}
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function _apply()
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{
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s = document.getElementById("search");
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var t = _triminput(s.value);
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if (!t)
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{
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shl = null;
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}
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else
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{
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t = _prepare(t)[0];
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shl = newhl(t, shl);
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}
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}
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function highlight()
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{
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resetuistate();
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_apply();
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repaint();
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selectfilter(0);
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}
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function filter()
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{
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resetuistate();
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if ((!shl && !hl.length) || (current == shl))
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{
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_apply();
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selectfilter(0);
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}
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if (current) {
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current.filter = !current.filter;
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_setfilterelementstate(_getfilterelement(current.id), current);
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if (filterswitch)
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render();
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else
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repaint();
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}
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}
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function group()
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{
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resetuistate();
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// the code it self happens in selectfilter() function
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if (!shl)
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{
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_hint("press higlight or filter first");
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return;
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}
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if (hl.length)
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{
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groupwith = true;
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_hint("-> now select a pinned filter to group the current highlight with");
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}
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else
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{
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_hint("you have to pin a filter with the 'pin' button first");
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}
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}
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function _restartshl()
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{
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var s = document.getElementById("search");
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s.value = "";
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s.style.backgroundColor = "";
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s.style.textDecoration = "";
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current = shl = null;
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}
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function restart()
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{
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resetuistate();
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var filtered = _gfilteron(); // was: = current && current.filter
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if (current == shl)
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{
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_restartshl();
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}
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else
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{
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var p0 = _getfilterelement(current.id);
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for (var h in hl)
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if (hl[h].id == current.id) {
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hl.splice(h, 1);
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break;
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}
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if (current.text) {
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shl = newhl(current.text, current);
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var s = document.getElementById("search");
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s.value = current.text;
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_setfilterelementstate(s, shl);
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}
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selectfilter(0);
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var p = document.getElementById("persistents");
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p.removeChild(p0);
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}
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if (!shl) // means: filter could not be switched back to shl or directly shl was reset
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render();
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}
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function selectfilter(filter)
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{
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var el0 = _getfilterelement(current ? current.id : 0);
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var el1 = _getfilterelement(filter);
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el0.style.border = "";
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el0.style.margin = "";
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el1.style.border = "solid 2px #3ad";
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el1.style.margin = "0px";
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function filterbyid(id)
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{
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for (var h in hl)
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if (hl[h].id == id)
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return hl[h];
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}
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if (groupwith && filter)
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{
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el1.innerHTML += "+" + shl.text;
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var _hl = filterbyid(filter);
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_hl.text = ""; // not backward compatible
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_hl.text_r += "|" + shl.text_r;
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_hl.cache = {};
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resetuistate();
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_restartshl();
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render();
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}
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else
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resetuistate();
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current = (filter == 0) ? shl : filterbyid(filter);
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// A bit hacky redraw of the search box color :)
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if (filter === 0 && shl)
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{
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var s = document.getElementById("search");
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s.style.backgroundColor = shl.color;
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}
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}
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function flipfilter(event)
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{
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filterswitch = !filterswitch;
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event.target.innerHTML = (filterswitch ? "filters on" : "filters off");
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render();
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event.stopPropagation();
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}
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