Initial commit
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// ==UserScript==
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// @name IMGXIS
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// @namespace http://yellowafterlife.itch.io/imgxis
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// @version 1.07
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// @description A userscript for better image viewing experience in browsers.
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// @include *://*.png*
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// @include *://*.jpg*
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// @include *://*.jpeg*
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// @include *://*.gif*
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// @include *://*.bmp*
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// @include *://*.webp*
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// @connect *
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// @include *://textures.minecraft.net/texture/*
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// @grant GM_getValue
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// @grant GM_setValue
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// @copyright 2015+, YellowAfterlife
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// ==/UserScript==
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// Revisions:
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// 1.06 (Sep 28, 2015): No longer blocking the default behaviour for alt+dragging the image.
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// 1.05 (Sep 26, 2015): Added a color picker (Ctrl+C to copy a color under the cursor);
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// 1.04 (Sep 25, 2015): Image are now "smoothed" when zoomed out; Fixed Firefox beta compatibilty.
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// 1.03 (Sep 24, 2015): Added a button to view the image in tiled form.
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// 1.02 (Jul 19, 2015): F5 now refreshes image without reloading the page. Shift+F5 for timer.
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// 1.01 (Apr 01, 2015): Added color presets (instead of a single color for all slots).
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// 1.00 (Mar 31, 2015): Initial release.
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// parameter group:
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var menuButtonWidth = 32; // in pixels
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var menuColors = 10; // how many color buttons to show in the menu
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var colorPickerEnabled = true; // whether to allow to Ctrl+C colors from the image
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var colorPickerMode = 0; // 0: hex, 1: rgb, 2: rgba
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// ensure that the page contains nothing but a single <img>:
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if (document.body.children.length != 1) return;
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var q = document.body.children[0];
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if (q.tagName != "IMG") return;
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// stylesheet:
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var css = document.createElement("style");
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css.type = "text/css";
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css.innerHTML = [
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":root {",
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" background: none !important;",
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"}",
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"body {",
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" overflow: hidden;",
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"}",
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// panner area
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".imgxis-panner {",
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" position: absolute;",
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" left: 0; width: 100%;",
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" top: 0; height: 100%;",
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"}",
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// cursors
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".imgxis-panner, .imgxis-panner img {",
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" cursor: move;",
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"}",
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".imgxis-panner.colorpick, .imgxis-panner.colorpick img {",
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" cursor: default;",
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" cursor: copy;",
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"}",
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// disable interpolation:
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".imgxis-panner.zoomed, .imgxis-panner.zoomed img {",
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" -ms-interpolation-mode: nearest-neighbor;",
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" image-rendering: optimizeSpeed;",
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" image-rendering: -moz-crisp-edges;",
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" image-rendering: -webkit-optimize-contrast;",
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" image-rendering: -o-crisp-edges;",
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" image-rendering: pixelated;",
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"}",
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// actual image:
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".imgxis-panner img {",
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// disable Firefox' centering:
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" position: relative;",
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" margin: 0;",
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" background-color: transparent !important;",
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"}",
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// menu pane on top:
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".imgxis-menu {",
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" position: absolute;",
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" left: 0; width: 100%;",
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" top: 0; height: 24px;",
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" background: rgba(0, 0, 0, 0.7);",
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" padding: 4px;",
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" color: white;",
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" font: 16px sans-serif;",
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" line-height: 24px;",
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" min-width: 1024px;",
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"}",
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// style the buttons in the menu:
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".imgxis-menu input {",
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" width: " + menuButtonWidth + "px;",
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" height: 24px;",
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" padding: 0px;",
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" margin-right: 2px;",
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" float: left;",
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"}",
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].join("\n");
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document.body.appendChild(css);
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// the thing is that browser has it's own zoom in controls, and they are
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// linked to that particular <img> natively. So we need to make a copy of it, strip
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// it of any unneeded styles, and put it in place of the original:
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var o = q.cloneNode();
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o.removeAttribute("width");
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o.removeAttribute("height");
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var panner = document.createElement("div");
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var pannerZoomed = false;
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panner.className = "imgxis-panner";
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panner.appendChild(o);
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q.parentNode.appendChild(panner);
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q.parentNode.removeChild(q);
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var s = o.style;
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s.transformOrigin = "top left";
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q = null;
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var tile = false;
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//
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var w = 0,
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h = 0,
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x = 0,
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y = 0,
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z = 0,
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m = 1;
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// pan and zoom:
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function update() {
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var pz = m > 1;
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if (pz != pannerZoomed) {
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pannerZoomed = pz;
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var cl = panner.classList;
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if (pz) cl.add("zoomed");
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else cl.remove("zoomed");
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}
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if (tile) {
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var p = panner.style;
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p.backgroundPosition = -x + "px " + -y + "px";
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p.backgroundSize = o.width * m + "px";
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}
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s.transform = "matrix(" + m + ",0,0," + m + "," + -x + "," + -y + ")";
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}
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function zoomto(zx, zy, d) {
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var p = m;
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m = Math.pow(2, (z += d));
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var f = m / p;
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x = (zx + x) * f - zx;
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y = (zy + y) * f - zy;
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menu_zoom.innerHTML = (0 | (m * 100)) + "%";
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update();
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}
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// color picker:
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var colorPickerCanvas = document.createElement("canvas");
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var colorPickerContext = colorPickerCanvas.getContext("2d");
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var colorPickerColor = document.createElement("input");
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colorPickerColor.type = "color";
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colorPickerColor.style.width = "24px";
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var colorPickerField = document.createElement("input");
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colorPickerField.type = "text";
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colorPickerField.style.width = "64px";
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colorPickerColor.title = colorPickerField.title =
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"Ctrl+C to copy a color under the cursor in here.";
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var colorPickerActive = false;
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function colorPickerUpdate() {
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var w = o.width;
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var h = o.height;
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if (w <= 0 || h <= 0) return;
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if (colorPickerCanvas.width != w) {
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colorPickerCanvas.width = w;
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} else if (colorPickerCanvas.height != h) {
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colorPickerCanvas.height = h;
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} else colorPickerContext.clearRect(0, 0, w, h);
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colorPickerContext.drawImage(o, 0, 0);
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var rx = (mx + x) / m;
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rx %= w;
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if (rx < 0) rx += w;
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var ry = (my + y) / m;
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ry %= h;
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if (ry < 0) ry += h;
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try {
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var d = colorPickerContext.getImageData(~~rx, ~~ry, 1, 1).data;
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var hex = "0123456789ABCDEF";
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var chx = "#";
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for (k = 0; k < 3; k++)
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chx += hex.charAt(d[k] >> 4) + hex.charAt(d[k] & 15);
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//
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var out = "",
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i,
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k;
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switch (colorPickerMode) {
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case 1:
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out = d[0] + "," + d[1] + "," + d[2];
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break;
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case 2:
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out = d[0] + "," + d[1] + "," + d[2] + "," + (d[3] / 255).toFixed(3);
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break;
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default:
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out = chx;
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}
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colorPickerColor.value = chx;
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colorPickerField.value = out;
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colorPickerField.select();
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} catch (_) {
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colorPickerField.value = "(error)";
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}
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}
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function colorPickerDeactivate() {
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colorPickerActive = false;
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panner.classList.remove("colorpick");
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}
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// menu:
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var menu_zoom = null,
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menu;
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(function () {
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menu = document.createElement("div");
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menu.className = "imgxis-menu";
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function menubt(s, f) {
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var bt = document.createElement("input");
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bt.type = "button";
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bt.value = s;
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bt.addEventListener("click", f);
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menu.appendChild(bt);
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}
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var defcolors = [
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"#1A1D23",
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"#60C19D",
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"#AB7680",
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"#FFFFFF",
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"#F4F2EC",
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"#CAC2BD",
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"#88898E",
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"#4F556A",
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"#1D1F2C",
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"#000000",
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];
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function menucl(i) {
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var bt = document.createElement("input");
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bt.type = "color";
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bt.value = GM_getValue("imgxis-color" + i, defcolors[i]);
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function bt_apply() {
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document.body.style.backgroundColor = bt.value;
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}
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bt.addEventListener("click", function (e) {
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if (!e.shiftKey) {
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e.preventDefault();
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bt_apply();
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}
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});
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bt.addEventListener("change", function (e) {
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GM_setValue("imgxis-color" + i, bt.value);
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bt_apply();
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});
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bt.title =
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"Color " + (i + 1) + ".\nClick to apply.\nShift+click to change.";
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menu.appendChild(bt);
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if (i == 0) bt_apply();
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}
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for (var i = 0; i < menuColors; i++) menucl(i);
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menubt("-", function (_) {
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zoomto(window.innerWidth / 2, window.innerHeight / 2, -0.5);
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});
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menubt("1:1", function (_) {
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var iw = window.innerWidth,
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ih = window.innerHeight;
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zoomto(iw / 2, ih / 2, -z);
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x = (w - iw) / 2;
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y = (h - ih) / 2;
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update();
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});
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menubt("+", function (_) {
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zoomto(window.innerWidth / 2, window.innerHeight / 2, 0.5);
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});
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menubt("tile", function (_) {
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tile = !tile;
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panner.style.backgroundImage = tile ? "url(" + o.src + ")" : "";
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update();
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});
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//
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if (colorPickerEnabled) {
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menu.appendChild(colorPickerColor);
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menu.appendChild(colorPickerField);
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}
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//
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menu_zoom = document.createElement("span");
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menu_zoom.innerHTML = "100%";
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menu.appendChild(menu_zoom);
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document.body.appendChild(menu);
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})();
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// mouse controls:
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function onmousewheel(e) {
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var d = e.wheelDelta || -e.detail;
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d = (d < 0 ? -1 : d > 0 ? 1 : 0) * 0.5;
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zoomto(e.pageX, e.pageY, d);
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}
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var mx = 0,
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my = 0,
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mp = false;
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function onmousemove(e) {
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var ox = mx;
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mx = e.pageX;
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var dx = mx - ox;
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var oy = my;
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my = e.pageY;
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var dy = my - oy;
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if (mp) {
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x -= mx - ox;
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y -= my - oy;
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update();
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} else if (colorPickerActive) {
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colorPickerUpdate();
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}
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}
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function onmousedown(e) {
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onmousemove(e);
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if (e.which != 3 && !e.altKey) {
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// not the right click
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e.preventDefault(); // disable image "grab"
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mp = true;
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}
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}
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function onmouseup(e) {
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onmousemove(e);
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mp = false;
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}
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//
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var refresh_timer = null;
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function refresh() {
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var o_src = o.src;
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// strip the previous timestamp parameter:
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var pos = o_src.indexOf("imgxis-time");
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if (pos >= 0) {
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switch (o_src.charAt(pos - 1)) {
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case "&":
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case "?":
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pos--;
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break;
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}
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o_src = o_src.substring(0, pos);
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}
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// add a timestamp parameter:
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o_src += o_src.indexOf("?") >= 0 ? "&" : "?";
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o_src += "imgxis-time=" + Date.now();
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//
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o.src = o_src;
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if (tile) panner.style.backgroundImage = "url(" + o.src + ")";
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}
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//
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function onkeydown(e) {
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switch (e.keyCode) {
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case 17:
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if (colorPickerEnabled) {
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colorPickerActive = true;
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colorPickerUpdate();
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panner.classList.add("colorpick");
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}
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break;
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case 116:
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e.preventDefault();
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if (e.shiftKey) {
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if (refresh_timer == null) {
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var t = parseFloat(prompt("Refresh interval (seconds)", "15"));
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if (!isNaN(t))
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refresh_timer = setInterval(refresh, Math.max(100, t * 1000));
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} else clearInterval(refresh_timer);
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} else refresh();
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break;
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}
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}
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function onkeyup(e) {
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switch (e.keyCode) {
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case 17:
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if (colorPickerActive) colorPickerDeactivate();
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break;
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}
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}
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function onblur(e) {
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if (colorPickerActive) colorPickerDeactivate();
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}
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window.addEventListener("mousemove", onmousemove);
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panner.addEventListener("mousedown", onmousedown);
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window.addEventListener("mouseup", onmouseup);
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window.addEventListener("mousewheel", onmousewheel);
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window.addEventListener("DOMMouseScroll", onmousewheel);
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window.addEventListener("keydown", onkeydown);
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window.addEventListener("keyup", onkeyup);
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window.addEventListener("blur", onblur);
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// consider that the image dimensions may not be available instantly:
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var onwait_t = 1000;
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var onwait = function onwait() {
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w = o.width;
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h = o.height;
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if (w > 0 && h > 0) {
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var iw = window.innerWidth,
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lw = w;
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var ih = window.innerHeight,
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lh = h;
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if (lw < iw && lh < ih)
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for (var k = 0; k < 3; k++) {
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if (lw * 2 < iw && lh * 2 < ih) {
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z++;
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lw *= 2;
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lh *= 2;
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}
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}
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else
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while (lw > iw || lh > ih) {
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z--;
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lw /= 2;
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lh /= 2;
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}
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m = Math.pow(2, z);
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menu_zoom.innerHTML = (0 | (m * 100)) + "%";
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x = -(iw - lw) / 2;
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y = -(ih - lh) / 2;
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update();
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} else if (--onwait_t > 0) setTimeout(onwait, 10);
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};
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onwait();
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