Prevent software keyboard popping up again in Android Chrome.

Working around some glitching when page was scrolled.
Prevent two-up being lost under options. Fixes #241 .
2018-11-06 17:16:22 +00:00 · 2018-11-06 17:15:49 +00:00 · 2018-11-06 17:15:15 +00:00 · 2018-11-06 14:19:48 +00:00 · 2018-11-06 14:19:24 +00:00 · 2018-11-06 13:50:50 +00:00
35 changed files with 566 additions and 823 deletions
--- a/codecs/mozjpeg_enc/README.md
+++ b/codecs/mozjpeg_enc/README.md
@ -39,5 +39,9 @@ struct MozJpegOptions {
  bool trellis_opt_zero;
  bool trellis_opt_table;
  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
 };
 ```
--- a/codecs/mozjpeg_enc/example.html
+++ b/codecs/mozjpeg_enc/example.html
@ -21,7 +21,7 @@
    console.log('Version:', module.version().toString(16));
    const image = await loadImage('../example.png');
    const result = module.encode(image.data, image.width, image.height, {
-      quality: 40,
+      quality: 75,
      baseline: false,
      arithmetic: false,
      progressive: true,
@ -29,10 +29,14 @@
      smoothing: 0,
      color_space: 3,
      quant_table: 3,
-      trellis_multipass: true,
-      trellis_opt_zero: true,
-      trellis_opt_table: true,
+      trellis_multipass: false,
+      trellis_opt_zero: false,
+      trellis_opt_table: false,
      trellis_loops: 1,
+      auto_subsample: true,
+      chroma_subsample: 2,
+      separate_chroma_quality: false,
+      chroma_quality: 75,
    });

    const blob = new Blob([result], {type: 'image/jpeg'});
--- a/codecs/mozjpeg_enc/mozjpeg_enc.cpp
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.cpp
@ -29,6 +29,10 @@ struct MozJpegOptions {
  bool trellis_opt_zero;
  bool trellis_opt_table;
  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
 };

 int version() {
@ -119,9 +123,6 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
   */
  jpeg_set_defaults(&cinfo);

-  /* Now you can set any non-default parameters you wish to.
-   * Here we just illustrate the use of quality (quantization table) scaling:
-   */
  jpeg_set_colorspace(&cinfo, (J_COLOR_SPACE) opts.color_space);

  if (opts.quant_table != -1) {
@ -142,11 +143,23 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
  jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_Q_OPT, opts.trellis_opt_table);
  jpeg_c_set_int_param(&cinfo, JINT_TRELLIS_NUM_LOOPS, opts.trellis_loops);

+  // A little hacky to build a string for this, but it means we can use set_quality_ratings which
+  // does some useful heuristic stuff.
  std::string quality_str = std::to_string(opts.quality);
+
+  if (opts.separate_chroma_quality && opts.color_space == JCS_YCbCr) {
+    quality_str += "," + std::to_string(opts.chroma_quality);
+  }
+
  char const *pqual = quality_str.c_str();

  set_quality_ratings(&cinfo, (char*) pqual, opts.baseline);

+  if (!opts.auto_subsample && opts.color_space == JCS_YCbCr) {
+    cinfo.comp_info[0].h_samp_factor = opts.chroma_subsample;
+    cinfo.comp_info[0].v_samp_factor = opts.chroma_subsample;
+  }
+
  if (!opts.baseline && opts.progressive) {
    jpeg_simple_progression(&cinfo);
  } else {
@ -209,6 +222,10 @@ EMSCRIPTEN_BINDINGS(my_module) {
    .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
    .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
    .field("trellis_loops", &MozJpegOptions::trellis_loops)
+    .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
+    .field("auto_subsample", &MozJpegOptions::auto_subsample)
+    .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
+    .field("chroma_quality", &MozJpegOptions::chroma_quality)
    ;

  function("version", &version);
--- a/codecs/mozjpeg_enc/mozjpeg_enc.js
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.js
--- a/codecs/mozjpeg_enc/mozjpeg_enc.wasm
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.wasm
--- a/package-lock.json
+++ b/package-lock.json
@ -59,9 +59,9 @@
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@ -254,9 +254,9 @@
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      "dev": true
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@ -339,9 +339,9 @@
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@ -904,67 +904,67 @@
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@ -1339,9 +1339,9 @@
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@ -1795,7 +1794,7 @@
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@ -1832,7 +1831,7 @@
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      "dev": true,
      "requires": {
        "node-forge": "0.7.5"
@ -9695,7 +9712,7 @@
    },
    "sha.js": {
      "version": "2.4.11",
-      "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
      "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
      "dev": true,
      "requires": {
@ -10071,9 +10088,9 @@
      "dev": true
    },
    "sshpk": {
-      "version": "1.14.2",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.14.2.tgz",
-      "integrity": "sha1-xvxhZIo9nE52T9P8306hBeSSupg=",
+      "version": "1.15.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.1.tgz",
+      "integrity": "sha512-mSdgNUaidk+dRU5MhYtN9zebdzF2iG0cNPWy8HG+W8y+fT1JnSkh0fzzpjOa0L7P8i1Rscz38t0h4gPcKz43xA==",
      "dev": true,
      "requires": {
        "asn1": "~0.2.3",
@ -10330,7 +10347,7 @@
      "dependencies": {
        "rimraf": {
          "version": "2.2.8",
-          "resolved": "http://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
          "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
          "dev": true
        }
@ -10350,7 +10367,7 @@
    },
    "through": {
      "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
      "dev": true
    },
@ -10455,11 +10472,12 @@
      "dev": true
    },
    "tough-cookie": {
-      "version": "2.3.4",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.3.4.tgz",
-      "integrity": "sha512-TZ6TTfI5NtZnuyy/Kecv+CnoROnyXn2DN97LontgQpCwsX2XyLYCC0ENhYkehSOwAp8rTQKc/NUIF7BkQ5rKLA==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
+      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
      "dev": true,
      "requires": {
+        "psl": "^1.1.24",
        "punycode": "^1.4.1"
      },
      "dependencies": {
@ -10756,8 +10774,7 @@
      "version": "0.14.5",
      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+      "dev": true
    },
    "type-is": {
      "version": "1.6.16",
@ -10924,18 +10941,18 @@
      "dev": true
    },
    "unique-filename": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.0.tgz",
-      "integrity": "sha1-0F8v5AMlYIcfMOk8vnNe6iAVFPM=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
+      "integrity": "sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==",
      "dev": true,
      "requires": {
        "unique-slug": "^2.0.0"
      }
    },
    "unique-slug": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.0.tgz",
-      "integrity": "sha1-22Z258fMBimHj/GWCXx4hVrp9Ks=",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.1.tgz",
+      "integrity": "sha512-n9cU6+gITaVu7VGj1Z8feKMmfAjEAQGhwD9fE3zvpRRa0wEIx8ODYkVGfSc94M2OX00tUFV8wH3zYbm1I8mxFg==",
      "dev": true,
      "requires": {
        "imurmurhash": "^0.1.4"
@ -11038,12 +11055,6 @@
        }
      }
    },
-    "url-join": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.0.tgz",
-      "integrity": "sha1-TTNA6AfTdzvamZH4MFrNzCpmXSo=",
-      "dev": true
-    },
    "url-parse": {
      "version": "1.4.3",
      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.4.3.tgz",
@ -11689,17 +11700,14 @@
      }
    },
    "webpack-dev-middleware": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.2.0.tgz",
-      "integrity": "sha512-YJLMF/96TpKXaEQwaLEo+Z4NDK8aV133ROF6xp9pe3gQoS7sxfpXh4Rv9eC+8vCvWfmDjRQaMSlRPbO+9G6jgA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.4.0.tgz",
+      "integrity": "sha512-Q9Iyc0X9dP9bAsYskAVJ/hmIZZQwf/3Sy4xCAZgL5cUkjZmUZLt4l5HpbST/Pdgjn3u6pE7u5OdGd1apgzRujA==",
      "dev": true,
      "requires": {
-        "loud-rejection": "^1.6.0",
        "memory-fs": "~0.4.1",
        "mime": "^2.3.1",
-        "path-is-absolute": "^1.0.0",
        "range-parser": "^1.0.3",
-        "url-join": "^4.0.0",
        "webpack-log": "^2.0.0"
      },
      "dependencies": {
@ -11712,9 +11720,9 @@
      }
    },
    "webpack-dev-server": {
-      "version": "3.1.8",
-      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.8.tgz",
-      "integrity": "sha512-c+tcJtDqnPdxCAzEEZKdIPmg3i5i7cAHe+B+0xFNK0BlCc2HF/unYccbU7xTgfGc5xxhCztCQzFmsqim+KhI+A==",
+      "version": "3.1.9",
+      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.9.tgz",
+      "integrity": "sha512-fqPkuNalLuc/hRC2QMkVYJkgNmRvxZQo7ykA2e1XRg/tMJm3qY7ZaD6d89/Fqjxtj9bOrn5wZzLD2n84lJdvWg==",
      "dev": true,
      "requires": {
        "ansi-html": "0.0.7",
@ -11742,7 +11750,7 @@
        "spdy": "^3.4.1",
        "strip-ansi": "^3.0.0",
        "supports-color": "^5.1.0",
-        "webpack-dev-middleware": "3.2.0",
+        "webpack-dev-middleware": "3.4.0",
        "webpack-log": "^2.0.0",
        "yargs": "12.0.2"
      },
@ -11795,9 +11803,9 @@
          }
        },
        "debug": {
-          "version": "3.2.5",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.5.tgz",
-          "integrity": "sha512-D61LaDQPQkxJ5AUM2mbSJRbPkNs/TmdmOeLAi1hgDkpDfIfetSrjmWhccwtuResSwMbACjx/xXQofvM9CE/aeg==",
+          "version": "3.2.6",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
          "dev": true,
          "requires": {
            "ms": "^2.1.1"
@ -12122,7 +12130,7 @@
    },
    "wrap-ansi": {
      "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
      "dev": true,
      "requires": {
@ -12518,7 +12526,7 @@
        },
        "minimist": {
          "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
          "dev": true
        },
--- a/package.json
+++ b/package.json
@ -15,10 +15,10 @@
    }
  },
  "devDependencies": {
-    "@types/node": "^9.6.23",
+    "@types/node": "^9.6.35",
    "@types/pretty-bytes": "^5.1.0",
    "@types/webassembly-js-api": "0.0.1",
-    "@webcomponents/custom-elements": "^1.2.0",
+    "@webcomponents/custom-elements": "^1.2.1",
    "babel-loader": "^7.1.5",
    "babel-plugin-jsx-pragmatic": "^1.0.2",
    "babel-plugin-syntax-dynamic-import": "^6.18.0",
@ -27,21 +27,28 @@
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-plugin-transform-react-constant-elements": "^6.23.0",
    "babel-plugin-transform-react-jsx": "^6.24.1",
-    "babel-plugin-transform-react-remove-prop-types": "^0.4.14",
+    "babel-plugin-transform-react-remove-prop-types": "^0.4.19",
    "babel-preset-env": "^1.7.0",
    "babel-register": "^6.26.0",
+    "classnames": "^2.2.6",
    "clean-webpack-plugin": "^0.1.19",
-    "copy-webpack-plugin": "^4.5.2",
+    "comlink": "^3.0.3",
+    "copy-webpack-plugin": "^4.5.3",
    "css-loader": "^0.28.11",
    "exports-loader": "^0.7.0",
+    "file-drop-element": "0.0.7",
    "file-loader": "^1.1.11",
    "html-webpack-plugin": "^3.2.0",
-    "husky": "^1.0.0-rc.13",
+    "husky": "^1.1.2",
    "if-env": "^1.0.4",
+    "linkstate": "^1.1.1",
    "loader-utils": "^1.1.0",
    "mini-css-extract-plugin": "^0.3.0",
-    "node-sass": "^4.9.3",
+    "node-sass": "^4.9.4",
    "optimize-css-assets-webpack-plugin": "^4.0.3",
+    "pointer-tracker": "^2.0.3",
+    "preact": "^8.3.1",
+    "pretty-bytes": "^5.1.0",
    "progress-bar-webpack-plugin": "^1.11.0",
    "raw-loader": "^0.5.1",
    "sass-loader": "^7.1.0",
@ -55,16 +62,11 @@
    "tslint-react": "^3.6.0",
    "typescript": "^2.9.2",
    "typings-for-css-modules-loader": "^1.7.0",
-    "webpack": "^4.19.1",
+    "webpack": "=4.19.1",
    "webpack-bundle-analyzer": "^2.13.1",
    "webpack-cli": "^2.1.5",
    "webpack-dev-server": "^3.1.5",
    "webpack-plugin-replace": "^1.1.1",
-    "classnames": "^2.2.6",
-    "comlink": "^3.0.3",
-    "linkstate": "^1.1.1",
-    "preact": "^8.3.1",
-    "pretty-bytes": "^5.1.0",
    "worker-plugin": "^1.1.1"
  }
 }
--- a/src/codecs/mozjpeg/encoder-meta.ts
+++ b/src/codecs/mozjpeg/encoder-meta.ts
@ -17,6 +17,10 @@ export interface EncodeOptions {
  trellis_opt_zero: boolean;
  trellis_opt_table: boolean;
  trellis_loops: number;
+  auto_subsample: boolean;
+  chroma_subsample: number;
+  separate_chroma_quality: boolean;
+  chroma_quality: number;
 }

 export interface EncoderState { type: typeof type; options: EncodeOptions; }
@ -38,4 +42,8 @@ export const defaultOptions: EncodeOptions = {
  trellis_opt_zero: false,
  trellis_opt_table: false,
  trellis_loops: 1,
+  auto_subsample: true,
+  chroma_subsample: 2,
+  separate_chroma_quality: false,
+  chroma_quality: 75,
 };
--- a/src/codecs/mozjpeg/options.tsx
+++ b/src/codecs/mozjpeg/options.tsx
@ -39,8 +39,13 @@ export default class MozJPEGEncoderOptions extends Component<Props, State> {
      trellis_multipass: inputFieldChecked(form.trellis_multipass, options.trellis_multipass),
      trellis_opt_zero: inputFieldChecked(form.trellis_opt_zero, options.trellis_opt_zero),
      trellis_opt_table: inputFieldChecked(form.trellis_opt_table, options.trellis_opt_table),
+      auto_subsample: inputFieldChecked(form.auto_subsample, options.auto_subsample),
+      separate_chroma_quality:
+        inputFieldChecked(form.separate_chroma_quality, options.separate_chroma_quality),
      // .value
      quality: inputFieldValueAsNumber(form.quality, options.quality),
+      chroma_quality: inputFieldValueAsNumber(form.chroma_quality, options.chroma_quality),
+      chroma_subsample: inputFieldValueAsNumber(form.chroma_subsample, options.chroma_subsample),
      smoothing: inputFieldValueAsNumber(form.smoothing, options.smoothing),
      color_space: inputFieldValueAsNumber(form.color_space, options.color_space),
      quant_table: inputFieldValueAsNumber(form.quant_table, options.quant_table),
@ -75,6 +80,72 @@ export default class MozJPEGEncoderOptions extends Component<Props, State> {
        <Expander>
          {showAdvanced ?
            <div>
+              <label class={style.optionTextFirst}>
+                Channels:
+                <Select
+                  name="color_space"
+                  value={options.color_space}
+                  onChange={this.onChange}
+                >
+                  <option value={MozJpegColorSpace.GRAYSCALE}>Grayscale</option>
+                  <option value={MozJpegColorSpace.RGB}>RGB</option>
+                  <option value={MozJpegColorSpace.YCbCr}>YCbCr</option>
+                </Select>
+              </label>
+              <Expander>
+                {options.color_space === MozJpegColorSpace.YCbCr ?
+                  <div>
+                    <label class={style.optionInputFirst}>
+                      <Checkbox
+                        name="auto_subsample"
+                        checked={options.auto_subsample}
+                        onChange={this.onChange}
+                      />
+                      Auto subsample chroma
+                    </label>
+                    <Expander>
+                      {options.auto_subsample ? null :
+                        <div class={style.optionOneCell}>
+                          <Range
+                            name="chroma_subsample"
+                            min="1"
+                            max="4"
+                            value={options.chroma_subsample}
+                            onInput={this.onChange}
+                          >
+                            Subsample chroma by:
+                          </Range>
+                        </div>
+                      }
+                    </Expander>
+                    <label class={style.optionInputFirst}>
+                      <Checkbox
+                        name="separate_chroma_quality"
+                        checked={options.separate_chroma_quality}
+                        onChange={this.onChange}
+                      />
+                      Separate chroma quality
+                    </label>
+                    <Expander>
+                      {options.separate_chroma_quality ?
+                        <div class={style.optionOneCell}>
+                          <Range
+                            name="chroma_quality"
+                            min="0"
+                            max="100"
+                            value={options.chroma_quality}
+                            onInput={this.onChange}
+                          >
+                            Chroma quality:
+                          </Range>
+                        </div>
+                        : null
+                      }
+                    </Expander>
+                  </div>
+                  : null
+                }
+              </Expander>
              <label class={style.optionInputFirst}>
                <Checkbox
                  name="baseline"
@ -119,18 +190,6 @@ export default class MozJPEGEncoderOptions extends Component<Props, State> {
                  Smoothing:
                </Range>
              </div>
-              <label class={style.optionTextFirst}>
-                Channels:
-                <Select
-                  name="color_space"
-                  value={options.color_space}
-                  onChange={this.onChange}
-                >
-                  <option value={MozJpegColorSpace.GRAYSCALE}>Grayscale</option>
-                  <option value={MozJpegColorSpace.RGB}>RGB</option>
-                  <option value={MozJpegColorSpace.YCbCr}>YCbCr</option>
-                </Select>
-              </label>
              <label class={style.optionTextFirst}>
                Quantization:
                <Select
--- a/src/codecs/webp/options.tsx
+++ b/src/codecs/webp/options.tsx
@ -26,8 +26,10 @@ const losslessPresets:[number, number][] = [
 ];
 const losslessPresetDefault = 6;

-function determineLosslessQuality(quality: number): number {
-  const index = losslessPresets.findIndex(item => item[1] === quality);
+function determineLosslessQuality(quality: number, method: number): number {
+  const index = losslessPresets.findIndex(
+    ([presetMethod, presetQuality]) => presetMethod === method && presetQuality === quality,
+  );
  if (index !== -1) return index;
  // Quality doesn't match one of the presets.
  // This can happen when toggling 'lossless'.
@ -45,7 +47,7 @@ export default class WebPEncoderOptions extends Component<Props, State> {
    const lossless = inputFieldCheckedAsNumber(form.lossless);
    const { options } = this.props;
    const losslessPresetValue = inputFieldValueAsNumber(
-      form.lossless_preset, determineLosslessQuality(options.quality),
+      form.lossless_preset, determineLosslessQuality(options.quality, options.method),
    );

    const newOptions: EncodeOptions = {
@ -97,7 +99,7 @@ export default class WebPEncoderOptions extends Component<Props, State> {
            name="lossless_preset"
            min="0"
            max="9"
-            value={determineLosslessQuality(options.quality)}
+            value={determineLosslessQuality(options.quality, options.method)}
            onInput={this.onChange}
          >
            Effort:
--- a/src/components/App/custom-els/FileDrop/index.ts
+++ b/src/components/App/custom-els/FileDrop/index.ts
@ -1,153 +0,0 @@
-import { bind } from '../../../../lib/initial-util';
-import './styles.css';
-
-// tslint:disable-next-line:max-line-length
-function firstMatchingItem(list: DataTransferItemList, acceptVal: string): DataTransferItem | undefined {
-  // Split accepts values by ',' then by '/'. Trim everything & lowercase.
-  const accepts = acceptVal.toLowerCase().split(',').map((accept) => {
-    return accept.trim().split('/').map(part => part.trim());
-  }).filter(acceptParts => acceptParts.length === 2); // Filter invalid values
-
-  return Array.from(list).find((item) => {
-    if (item.kind !== 'file') return false;
-
-    // 'Parse' the type.
-    const [typeMain, typeSub] = item.type.toLowerCase().split('/').map(s => s.trim());
-
-    for (const [acceptMain, acceptSub] of accepts) {
-      // Look for an exact match, or a partial match if * is accepted, eg image/*.
-      if (typeMain === acceptMain && (acceptSub === '*' || typeSub === acceptSub)) {
-        return true;
-      }
-    }
-    return false;
-  });
-}
-
-function getFileData(data: DataTransfer, accept: string): File | undefined {
-  const dragDataItem = firstMatchingItem(data.items, accept);
-  if (!dragDataItem) return;
-
-  return dragDataItem.getAsFile() || undefined;
-}
-
-interface FileDropEventInit extends EventInit {
-  action: FileDropAccept;
-  file: File;
-}
-
-type FileDropAccept = 'drop' | 'paste';
-
-// Safari and Edge don't quite support extending Event, this works around it.
-function fixExtendedEvent(instance: Event, type: Function) {
-  if (!(instance instanceof type)) {
-    Object.setPrototypeOf(instance, type.prototype);
-  }
-}
-
-export class FileDropEvent extends Event {
-  private _action: FileDropAccept;
-  private _file: File;
-  constructor(typeArg: string, eventInitDict: FileDropEventInit) {
-    super(typeArg, eventInitDict);
-    fixExtendedEvent(this, FileDropEvent);
-    this._file = eventInitDict.file;
-    this._action = eventInitDict.action;
-  }
-
-  get action() {
-    return this._action;
-  }
-
-  get file() {
-    return this._file;
-  }
-}
-
-/*
-  Example Usage.
-  <file-drop
-    accept='image/*'
-    class='drop-valid|drop-invalid'
-  >
-   [everything in here is a drop target.]
-  </file-drop>
-
-  dropElement.addEventListner('dropfile', (event) => console.log(event.detail))
-*/
-export class FileDrop extends HTMLElement {
-
-  private _dragEnterCount = 0;
-
-  constructor() {
-    super();
-    this.addEventListener('dragover', event => event.preventDefault());
-    this.addEventListener('drop', this._onDrop);
-    this.addEventListener('dragenter', this._onDragEnter);
-    this.addEventListener('dragend', () => this._reset());
-    this.addEventListener('dragleave', this._onDragLeave);
-    this.addEventListener('paste', this._onPaste);
-  }
-
-  get accept() {
-    return this.getAttribute('accept') || '';
-  }
-
-  set accept(val: string) {
-    this.setAttribute('accept', val);
-  }
-
-  @bind
-  private _onDragEnter(event: DragEvent) {
-    this._dragEnterCount += 1;
-    if (this._dragEnterCount > 1) return;
-
-    // We don't have data, attempt to get it and if it matches, set the correct state.
-    const validDrop: boolean = event.dataTransfer.items.length ?
-      !!firstMatchingItem(event.dataTransfer.items, this.accept) :
-      // Safari doesn't give file information on drag enter, so the best we can do is return valid.
-      true;
-
-    if (validDrop) {
-      this.classList.add('drop-valid');
-    } else {
-      this.classList.add('drop-invalid');
-    }
-  }
-
-  @bind
-  private _onDragLeave() {
-    this._dragEnterCount -= 1;
-    if (this._dragEnterCount === 0) {
-      this._reset();
-    }
-  }
-
-  @bind
-  private _onDrop(event: DragEvent) {
-    event.preventDefault();
-    this._reset();
-    const action = 'drop';
-    const file = getFileData(event.dataTransfer, this.accept);
-    if (file === undefined) return;
-
-    this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
-  }
-
-  @bind
-  private _onPaste(event: ClipboardEvent) {
-    const action = 'paste';
-    const file = getFileData(event.clipboardData, this.accept);
-    if (file === undefined) return;
-
-    this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
-  }
-
-  private _reset() {
-    this._dragEnterCount = 0;
-    this.classList.remove('drop-valid');
-    this.classList.remove('drop-invalid');
-  }
-}
-
-customElements.define('file-drop', FileDrop);
--- a/src/components/App/custom-els/FileDrop/missing-types.d.ts
+++ b/src/components/App/custom-els/FileDrop/missing-types.d.ts
@ -1,19 +0,0 @@
-import { FileDropEvent, FileDrop } from '.';
-
-declare global {
-
-  interface HTMLElementEventMap {
-    'filedrop': FileDropEvent;
-  }
-
-  namespace JSX {
-    interface IntrinsicElements {
-      'file-drop': FileDropAttributes;
-    }
-
-    interface FileDropAttributes extends HTMLAttributes {
-      accept?: string;
-      onfiledrop?: ((this: FileDrop, ev: FileDropEvent) => any) | null;
-    }
-  }
-}
--- a/src/components/App/custom-els/FileDrop/styles.css
+++ b/src/components/App/custom-els/FileDrop/styles.css
@ -1,3 +0,0 @@
-file-drop {
-  display: block;
-}
--- a/src/components/App/index.tsx
+++ b/src/components/App/index.tsx
@ -2,9 +2,9 @@ import { h, Component } from 'preact';

 import { bind, linkRef, Fileish } from '../../lib/initial-util';
 import * as style from './style.scss';
-import { FileDropEvent } from './custom-els/FileDrop';
-import './custom-els/FileDrop';
-import SnackBarElement from '../../lib/SnackBar';
+import { FileDropEvent } from 'file-drop-element';
+import 'file-drop-element';
+import SnackBarElement, { SnackOptions } from '../../lib/SnackBar';
 import '../../lib/SnackBar';
 import Intro from '../intro';
 import '../custom-els/LoadingSpinner';
@ -39,7 +39,7 @@ export default class App extends Component<Props, State> {
    import('../compress').then((module) => {
      this.setState({ Compress: module.default });
    }).catch(() => {
-      this.showError('Failed to load app');
+      this.showSnack('Failed to load app');
    });

    // In development, persist application state across hot reloads:
@ -66,9 +66,9 @@ export default class App extends Component<Props, State> {
  }

  @bind
-  private showError(error: string) {
+  private showSnack(message: string, options: SnackOptions = {}): Promise<string> {
    if (!this.snackbar) throw Error('Snackbar missing');
-    this.snackbar.showSnackbar({ message: error });
+    return this.snackbar.showSnackbar(message, options);
  }

  render({}: Props, { file, Compress }: State) {
@ -76,9 +76,9 @@ export default class App extends Component<Props, State> {
      <div id="app" class={style.app}>
        <file-drop accept="image/*" onfiledrop={this.onFileDrop} class={style.drop}>
          {(!file)
-            ? <Intro onFile={this.onIntroPickFile} onError={this.showError} />
+            ? <Intro onFile={this.onIntroPickFile} showSnack={this.showSnack} />
            : (Compress)
-              ? <Compress file={file} onError={this.showError} />
+              ? <Compress file={file} showSnack={this.showSnack} />
              : <loading-spinner class={style.appLoader}/>
          }
          <snack-bar ref={linkRef(this, 'snackbar')} />
--- a/src/components/Options/index.tsx
+++ b/src/components/Options/index.tsx
@ -59,13 +59,11 @@ const encoderOptionsComponentMap = {
 interface Props {
  mobileView: boolean;
  source?: SourceImage;
-  imageIndex: number;
  encoderState: EncoderState;
  preprocessorState: PreprocessorState;
  onEncoderTypeChange(newType: EncoderType): void;
  onEncoderOptionsChange(newOptions: EncoderOptions): void;
  onPreprocessorOptionsChange(newOptions: PreprocessorState): void;
-  onCopyToOtherClick(): void;
 }

 interface State {
@ -116,16 +114,9 @@ export default class Options extends Component<Props, State> {
    );
  }

-  @bind
-  onCopyToOtherClick(event: Event) {
-    event.preventDefault();
-    this.props.onCopyToOtherClick();
-  }
-
  render(
    {
      source,
-      imageIndex,
      encoderState,
      preprocessorState,
      onEncoderOptionsChange,
@ -205,14 +196,6 @@ export default class Options extends Component<Props, State> {
            />
          : null}
        </Expander>
-
-        <div class={style.optionsCopy}>
-          <button onClick={this.onCopyToOtherClick} class={style.copyButton}>
-            {imageIndex === 1 && '← '}
-            Copy settings across
-            {imageIndex === 0 && ' →'}
-          </button>
-        </div>
      </div>
    );
  }
--- a/src/components/Options/style.scss
+++ b/src/components/Options/style.scss
@ -54,19 +54,5 @@ $horizontalPadding: 15px;
 .options-scroller {
  overflow-x: hidden;
  overflow-y: auto;
-}
-
-.options-copy {
-  display: grid;
-  background: rgba(0, 0, 0, 0.9);
-  padding: 5px;
-}
-
-.copy-button {
-  composes: unbutton from '../../lib/util.scss';
-  background: #484848;
-  border-radius: 4px;
-  color: #fff;
-  text-align: left;
-  padding: 5px 10px;
+  -webkit-overflow-scrolling: touch;
 }
--- a/src/components/Output/custom-els/PinchZoom/index.ts
+++ b/src/components/Output/custom-els/PinchZoom/index.ts
@ -1,5 +1,5 @@
+import PointerTracker, { Pointer } from 'pointer-tracker';
 import './styles.css';
-import { PointerTracker, Pointer } from '../../../../lib/PointerTracker';

 interface Point {
  clientX: number;
--- a/src/components/Output/custom-els/TwoUp/index.ts
+++ b/src/components/Output/custom-els/TwoUp/index.ts
@ -1,5 +1,5 @@
+import PointerTracker, { Pointer } from 'pointer-tracker';
 import * as styles from './styles.css';
-import { PointerTracker, Pointer } from '../../../../lib/PointerTracker';

 const legacyClipCompatAttr = 'legacy-clip-compat';
 const orientationAttr = 'orientation';
--- a/src/components/Output/index.tsx
+++ b/src/components/Output/index.tsx
@ -177,6 +177,17 @@ export default class Output extends Component<Props, State> {
    const clonedEvent = new (event.constructor as typeof Event)(event.type, event);
    this.retargetedEvents.add(clonedEvent);
    this.pinchZoomLeft.dispatchEvent(clonedEvent);
+
+    // Unfocus any active element on touchend. This fixes an issue on (at least) Android Chrome,
+    // where the software keyboard is hidden, but the input remains focused, then after interaction
+    // with this element the keyboard reappears for NO GOOD REASON. Thanks Android.
+    if (
+      event.type === 'touchend' &&
+      document.activeElement &&
+      document.activeElement instanceof HTMLElement
+    ) {
+      document.activeElement.blur();
+    }
  }

  render(
--- a/src/components/Output/style.scss
+++ b/src/components/Output/style.scss
@ -129,4 +129,8 @@

 .output-canvas {
  flex-shrink: 0;
+  // This fixes a severe painting bug in Chrome.
+  // We should try to remove this once the issue is fixed.
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=870222#c10
+  will-change: auto;
 }
--- a/src/components/compress/index.tsx
+++ b/src/components/compress/index.tsx
@ -34,7 +34,8 @@ import Processor from '../../codecs/processor';
 import { VectorResizeOptions, BitmapResizeOptions } from '../../codecs/resize/processor-meta';
 import './custom-els/MultiPanel';
 import Results from '../results';
-import { ExpandIcon } from '../../lib/icons';
+import { ExpandIcon, CopyAcrossIconProps } from '../../lib/icons';
+import SnackBarElement from 'src/lib/SnackBar';

 export interface SourceImage {
  file: File | Fileish;
@ -58,7 +59,7 @@ interface EncodedImage {

 interface Props {
  file: File | Fileish;
-  onError: (msg: string) => void;
+  showSnack: SnackBarElement['showSnackbar'];
 }

 interface State {
@ -136,7 +137,7 @@ async function processSvg(blob: Blob): Promise<HTMLImageElement> {
  const parser = new DOMParser();
  const text = await blobToText(blob);
  const document = parser.parseFromString(text, 'image/svg+xml');
-  const svg = document.documentElement;
+  const svg = document.documentElement!;

  if (svg.hasAttribute('width') && svg.hasAttribute('height')) {
    return blobToImg(blob);
@ -156,6 +157,9 @@ async function processSvg(blob: Blob): Promise<HTMLImageElement> {

 // These are only used in the mobile view
 const resultTitles = ['Top', 'Bottom'];
+// These are only used in the desktop view
+const buttonPositions =
+  ['download-left', 'download-right'] as ('download-left' | 'download-right')[];

 export default class Compress extends Component<Props, State> {
  widthQuery = window.matchMedia('(max-width: 599px)');
@ -247,12 +251,24 @@ export default class Compress extends Component<Props, State> {
    }
  }

-  private onCopyToOtherClick(index: 0 | 1) {
+  private async onCopyToOtherClick(index: 0 | 1) {
    const otherIndex = (index + 1) % 2;
+    const oldSettings = this.state.images[otherIndex];

    this.setState({
      images: cleanSet(this.state.images, otherIndex, this.state.images[index]),
    });
+
+    const result = await this.props.showSnack('Settings copied across', {
+      timeout: 5000,
+      actions: ['undo', 'dismiss'],
+    });
+
+    if (result !== 'undo') return;
+
+    this.setState({
+      images: cleanSet(this.state.images, otherIndex, oldSettings),
+    });
  }

  @bind
@ -315,7 +331,7 @@ export default class Compress extends Component<Props, State> {
      console.error(err);
      // Another file has been opened before this one processed.
      if (this.state.loadingCounter !== loadingCounter) return;
-      this.props.onError('Invalid image');
+      this.props.showSnack('Invalid image');
      this.setState({ loading: false });
    }
  }
@ -374,7 +390,7 @@ export default class Compress extends Component<Props, State> {
        }
      } catch (err) {
        if (err.name === 'AbortError') return;
-        this.props.onError(`Processing error (type=${image.encoderState.type}): ${err}`);
+        this.props.showSnack(`Processing error (type=${image.encoderState.type}): ${err}`);
        throw err;
      }
    }
@ -405,26 +421,30 @@ export default class Compress extends Component<Props, State> {
      <Options
        source={source}
        mobileView={mobileView}
-        imageIndex={index}
        preprocessorState={image.preprocessorState}
        encoderState={image.encoderState}
        onEncoderTypeChange={this.onEncoderTypeChange.bind(this, index)}
        onEncoderOptionsChange={this.onEncoderOptionsChange.bind(this, index)}
        onPreprocessorOptionsChange={this.onPreprocessorOptionsChange.bind(this, index)}
-        onCopyToOtherClick={this.onCopyToOtherClick.bind(this, index)}
      />
    ));

-    const results = images.map((image, i) => (
+    const copyDirections =
+      (mobileView ? ['down', 'up'] : ['right', 'left']) as CopyAcrossIconProps['copyDirection'][];
+
+    const results = images.map((image, index) => (
      <Results
        downloadUrl={image.downloadUrl}
        imageFile={image.file}
        source={source}
        loading={loading || image.loading}
+        copyDirection={copyDirections[index]}
+        onCopyToOtherClick={this.onCopyToOtherClick.bind(this, index)}
+        buttonPosition={mobileView ? 'stack-right' : buttonPositions[index]}
      >
        {!mobileView ? null : [
          <ExpandIcon class={style.expandIcon} key="expand-icon"/>,
-          `${resultTitles[i]} (${encoderMap[image.encoderState.type].label})`,
+          `${resultTitles[index]} (${encoderMap[image.encoderState.type].label})`,
        ]}
      </Results>
    ));
--- a/src/components/compress/style.scss
+++ b/src/components/compress/style.scss
@ -32,7 +32,7 @@
  }

  @media (min-width: 860px) {
-    max-height: 100%;
+    max-height: calc(100% - 40px);
  }
 }

--- a/src/components/intro/index.tsx
+++ b/src/components/intro/index.tsx
@ -12,6 +12,7 @@ import artworkIcon from './imgs/demos/artwork-icon.jpg';
 import deviceScreenIcon from './imgs/demos/device-screen-icon.jpg';
 import logoIcon from './imgs/demos/logo-icon.png';
 import * as style from './style.scss';
+import SnackBarElement from '../../lib/SnackBar';

 const demos = [
  {
@ -42,7 +43,7 @@ const demos = [

 interface Props {
  onFile: (file: File | Fileish) => void;
-  onError: (error: string) => void;
+  showSnack: SnackBarElement['showSnackbar'];
 }
 interface State {
  fetchingDemoIndex?: number;
@ -79,7 +80,7 @@ export default class Intro extends Component<Props, State> {
      this.props.onFile(file);
    } catch (err) {
      this.setState({ fetchingDemoIndex: undefined });
-      this.props.onError("Couldn't fetch demo image");
+      this.props.showSnack("Couldn't fetch demo image");
    }
  }

--- a/src/components/intro/style.scss
+++ b/src/components/intro/style.scss
@ -19,7 +19,6 @@
 }

 .intro {
-  composes: abs-fill from '../../lib/util.scss';
  display: grid;
  grid-template-rows: 1fr min-content;
  align-items: center;
@ -29,6 +28,9 @@
  -webkit-overflow-scrolling: touch;
  overflow: auto;
  padding: 20px 0 0;
+  height: 100%;
+  box-sizing: border-box;
+  overscroll-behavior: contain;
 }

 .logo-container {
--- a/src/components/results/index.tsx
+++ b/src/components/results/index.tsx
@ -2,10 +2,10 @@ import { h, Component, ComponentChildren, ComponentChild } from 'preact';

 import * as style from './style.scss';
 import FileSize from './FileSize';
-import { DownloadIcon } from '../../lib/icons';
+import { DownloadIcon, CopyAcrossIcon, CopyAcrossIconProps } from '../../lib/icons';
 import '../custom-els/LoadingSpinner';
 import { SourceImage } from '../compress';
-import { Fileish } from '../../lib/initial-util';
+import { Fileish, bind } from '../../lib/initial-util';

 interface Props {
  loading: boolean;
@ -13,12 +13,21 @@ interface Props {
  imageFile?: Fileish;
  downloadUrl?: string;
  children: ComponentChildren;
+  copyDirection: CopyAcrossIconProps['copyDirection'];
+  buttonPosition: keyof typeof buttonPositionClass;
+  onCopyToOtherClick(): void;
 }

 interface State {
  showLoadingState: boolean;
 }

+const buttonPositionClass = {
+  'stack-right': style.stackRight,
+  'download-right': style.downloadRight,
+  'download-left': style.downloadLeft,
+};
+
 const loadingReactionDelay = 500;

 export default class Results extends Component<Props, State> {
@ -43,9 +52,19 @@ export default class Results extends Component<Props, State> {
    }
  }

-  render({ source, imageFile, downloadUrl, children }: Props, { showLoadingState }: State) {
+  @bind
+  private onCopyToOtherClick(event: Event) {
+    event.preventDefault();
+    this.props.onCopyToOtherClick();
+  }
+
+  render(
+    { source, imageFile, downloadUrl, children, copyDirection, buttonPosition }: Props,
+    { showLoadingState }: State,
+  ) {
+
    return (
-      <div class={style.results}>
+      <div class={`${style.results} ${buttonPositionClass[buttonPosition]}`}>
        <div class={style.resultData}>
          {(children as ComponentChild[])[0]
            ? <div class={style.resultTitle}>{children}</div>
@ -59,6 +78,14 @@ export default class Results extends Component<Props, State> {
          }
        </div>

+        <button
+          class={style.copyToOther}
+          title="Copy settings to other side"
+          onClick={this.onCopyToOtherClick}
+        >
+          <CopyAcrossIcon class={style.copyIcon} copyDirection={copyDirection} />
+        </button>
+
        <div class={style.download}>
          {(downloadUrl && imageFile) && (
            <a
--- a/src/components/results/style.scss
+++ b/src/components/results/style.scss
@ -16,9 +16,17 @@

 .results {
  display: grid;
-  grid-template-columns: 1fr auto;
+  grid-template-columns: [text] 1fr [copy-button] auto [download-button] auto;
  background: rgba(0, 0, 0, 0.9);
+  font-size: 1rem;
+
+  @media (min-width: 400px) {
+    font-size: 1.2rem;
+  }
+
+  @media (min-width: 600px) {
    font-size: 1.4rem;
+  }

  &:focus {
    outline: none;
@ -26,13 +34,29 @@
 }

 .result-data {
+  grid-row: 1;
+  grid-column: text;
  display: flex;
  align-items: center;
-  padding: 0 15px;
+  padding: 0 10px;
  white-space: nowrap;
  overflow: hidden;
 }

+.download-right {
+  grid-template-columns: [copy-button] auto [text] 1fr [download-button] auto;
+}
+
+.download-left {
+  grid-template-columns: [download-button] auto [text] 1fr [copy-button] auto;
+}
+
+.stack-right {
+  & .result-data {
+    padding: 0 15px;
+  }
+}
+
 .result-title {
  display: flex;
  align-items: center;
@ -40,7 +64,7 @@
 }

 .size-delta {
-  font-size: 1.1rem;
+  font-size: 0.8em;
  font-style: italic;
  position: relative;
  top: -1px;
@ -56,6 +80,8 @@
 }

 .download {
+  grid-row: 1;
+  grid-column: download-button;
  background: #34B9EB;
  --size: 38px;
  width: var(--size);
@ -77,7 +103,8 @@
  animation: action-leave 0.2s;
 }

-.download-icon {
+.download-icon,
+.copy-icon {
  color: #fff;
  display: block;
  --size: 24px;
@ -93,3 +120,12 @@
  --size: 22px;
  grid-area: 1/1;
 }
+
+.copy-to-other {
+  grid-row: 1;
+  grid-column: copy-button;
+  composes: unbutton from '../../lib/util.scss';
+  composes: download;
+
+  background: #656565;
+}
--- a/src/custom-els/RangeInput/index.ts
+++ b/src/custom-els/RangeInput/index.ts
@ -1,6 +1,6 @@
+import PointerTracker from 'pointer-tracker';
 import { bind } from '../../lib/initial-util';
 import * as style from './styles.css';
-import { PointerTracker } from '../../lib/PointerTracker';

 const RETARGETED_EVENTS = ['focus', 'blur'];
 const UPDATE_EVENTS = ['input', 'change'];
@ -57,6 +57,8 @@ class RangeInputElement extends HTMLElement {

    this.insertBefore(this._input, this.firstChild);
    this._valueDisplay = this.querySelector('.' + style.valueDisplay) as HTMLDivElement;
+    // Set inline styles (this is useful when used with frameworks which might clear inline styles)
+    this._update();
  }

  get labelPrecision(): string {
--- a/src/lib/PointerTracker/index.ts
+++ b/src/lib/PointerTracker/index.ts
@ -1,255 +0,0 @@
-import { bind } from '../../lib/initial-util';
-const enum Button { Left }
-
-export class Pointer {
-  /** x offset from the top of the document */
-  pageX: number;
-  /** y offset from the top of the document */
-  pageY: number;
-  /** x offset from the top of the viewport */
-  clientX: number;
-  /** y offset from the top of the viewport */
-  clientY: number;
-  /** ID for this pointer */
-  id: number = -1;
-  /** The platform object used to create this Pointer */
-  nativePointer: Touch | PointerEvent | MouseEvent;
-
-  constructor (nativePointer: Touch | PointerEvent | MouseEvent) {
-    this.nativePointer = nativePointer;
-    this.pageX = nativePointer.pageX;
-    this.pageY = nativePointer.pageY;
-    this.clientX = nativePointer.clientX;
-    this.clientY = nativePointer.clientY;
-
-    if (self.Touch && nativePointer instanceof Touch) {
-      this.id = nativePointer.identifier;
-    } else if (isPointerEvent(nativePointer)) { // is PointerEvent
-      this.id = nativePointer.pointerId;
-    }
-  }
-
-  /**
-   * Returns an expanded set of Pointers for high-resolution inputs.
-   */
-  getCoalesced(): Pointer[] {
-    if ('getCoalescedEvents' in this.nativePointer) {
-      return this.nativePointer.getCoalescedEvents().map(p => new Pointer(p));
-    }
-    return [this];
-  }
-}
-
-const isPointerEvent = (event: any): event is PointerEvent =>
-  self.PointerEvent && event instanceof PointerEvent;
-
-const noop = () => {};
-
-export type InputEvent = TouchEvent | PointerEvent | MouseEvent;
-type StartCallback = (pointer: Pointer, event: InputEvent) => boolean;
-type MoveCallback = (
-  previousPointers: Pointer[],
-  changedPointers: Pointer[],
-  event: InputEvent,
-) => void;
-type EndCallback = (pointer: Pointer, event: InputEvent) => void;
-
-interface PointerTrackerCallbacks {
-  /**
-   * Called when a pointer is pressed/touched within the element.
-   *
-   * @param pointer The new pointer.
-   * This pointer isn't included in this.currentPointers or this.startPointers yet.
-   * @param event The event related to this pointer.
-   *
-   * @returns Whether you want to track this pointer as it moves.
-   */
-  start?: StartCallback;
-  /**
-   * Called when pointers have moved.
-   *
-   * @param previousPointers The state of the pointers before this event.
-   * This contains the same number of pointers, in the same order, as
-   * this.currentPointers and this.startPointers.
-   * @param changedPointers The pointers that have changed since the last move callback.
-   * @param event The event related to the pointer changes.
-   */
-  move?: MoveCallback;
-  /**
-   * Called when a pointer is released.
-   *
-   * @param pointer The final state of the pointer that ended. This
-   * pointer is now absent from this.currentPointers and
-   * this.startPointers.
-   * @param event The event related to this pointer.
-   */
-  end?: EndCallback;
-}
-
-/**
- * Track pointers across a particular element
- */
-export class PointerTracker {
-  /**
-   * State of the tracked pointers when they were pressed/touched.
-   */
-  readonly startPointers: Pointer[] = [];
-  /**
-   * Latest state of the tracked pointers. Contains the same number
-   * of pointers, and in the same order as this.startPointers.
-   */
-  readonly currentPointers: Pointer[] = [];
-
-  private _startCallback: StartCallback;
-  private _moveCallback: MoveCallback;
-  private _endCallback: EndCallback;
-
-  /**
-   * Track pointers across a particular element
-   *
-   * @param element Element to monitor.
-   * @param callbacks
-   */
-  constructor (private _element: HTMLElement, callbacks: PointerTrackerCallbacks) {
-    const {
-      start = () => true,
-      move = noop,
-      end = noop,
-    } = callbacks;
-
-    this._startCallback = start;
-    this._moveCallback = move;
-    this._endCallback = end;
-
-    // Add listeners
-    if (self.PointerEvent) {
-      this._element.addEventListener('pointerdown', this._pointerStart);
-    } else {
-      this._element.addEventListener('mousedown', this._pointerStart);
-      this._element.addEventListener('touchstart', this._touchStart);
-      this._element.addEventListener('touchmove', this._move);
-      this._element.addEventListener('touchend', this._touchEnd);
-    }
-  }
-
-  /**
-   * Call the start callback for this pointer, and track it if the user wants.
-   *
-   * @param pointer Pointer
-   * @param event Related event
-   * @returns Whether the pointer is being tracked.
-   */
-  private _triggerPointerStart (pointer: Pointer, event: InputEvent): boolean {
-    if (!this._startCallback(pointer, event)) return false;
-    this.currentPointers.push(pointer);
-    this.startPointers.push(pointer);
-    return true;
-  }
-
-  /**
-   * Listener for mouse/pointer starts. Bound to the class in the constructor.
-   *
-   * @param event This will only be a MouseEvent if the browser doesn't support
-   * pointer events.
-   */
-  @bind
-  private _pointerStart (event: PointerEvent | MouseEvent) {
-    if (event.button !== Button.Left) return;
-    if (!this._triggerPointerStart(new Pointer(event), event)) return;
-
-    // Add listeners for additional events.
-    // The listeners may already exist, but no harm in adding them again.
-    if (isPointerEvent(event)) {
-      this._element.setPointerCapture(event.pointerId);
-      this._element.addEventListener('pointermove', this._move);
-      this._element.addEventListener('pointerup', this._pointerEnd);
-    } else { // MouseEvent
-      window.addEventListener('mousemove', this._move);
-      window.addEventListener('mouseup', this._pointerEnd);
-    }
-  }
-
-  /**
-   * Listener for touchstart. Bound to the class in the constructor.
-   * Only used if the browser doesn't support pointer events.
-   */
-  @bind
-  private _touchStart (event: TouchEvent) {
-    for (const touch of Array.from(event.changedTouches)) {
-      this._triggerPointerStart(new Pointer(touch), event);
-    }
-  }
-
-  /**
-   * Listener for pointer/mouse/touch move events.
-   * Bound to the class in the constructor.
-   */
-  @bind
-  private _move (event: PointerEvent | MouseEvent | TouchEvent) {
-    const previousPointers = this.currentPointers.slice();
-    const changedPointers = ('changedTouches' in event) ? // Shortcut for 'is touch event'.
-      Array.from(event.changedTouches).map(t => new Pointer(t)) :
-      [new Pointer(event)];
-    const trackedChangedPointers = [];
-
-    for (const pointer of changedPointers) {
-      const index = this.currentPointers.findIndex(p => p.id === pointer.id);
-      if (index === -1) continue; // Not a pointer we're tracking
-      trackedChangedPointers.push(pointer);
-      this.currentPointers[index] = pointer;
-    }
-
-    if (trackedChangedPointers.length === 0) return;
-
-    this._moveCallback(previousPointers, trackedChangedPointers, event);
-  }
-
-  /**
-   * Call the end callback for this pointer.
-   *
-   * @param pointer Pointer
-   * @param event Related event
-   */
-  @bind
-  private _triggerPointerEnd (pointer: Pointer, event: InputEvent): boolean {
-    const index = this.currentPointers.findIndex(p => p.id === pointer.id);
-    // Not a pointer we're interested in?
-    if (index === -1) return false;
-
-    this.currentPointers.splice(index, 1);
-    this.startPointers.splice(index, 1);
-
-    this._endCallback(pointer, event);
-    return true;
-  }
-
-  /**
-   * Listener for mouse/pointer ends. Bound to the class in the constructor.
-   * @param event This will only be a MouseEvent if the browser doesn't support
-   * pointer events.
-   */
-  @bind
-  private _pointerEnd (event: PointerEvent | MouseEvent) {
-    if (!this._triggerPointerEnd(new Pointer(event), event)) return;
-
-    if (isPointerEvent(event)) {
-      if (this.currentPointers.length) return;
-      this._element.removeEventListener('pointermove', this._move);
-      this._element.removeEventListener('pointerup', this._pointerEnd);
-    } else { // MouseEvent
-      window.removeEventListener('mousemove', this._move);
-      window.removeEventListener('mouseup', this._pointerEnd);
-    }
-  }
-
-  /**
-   * Listener for touchend. Bound to the class in the constructor.
-   * Only used if the browser doesn't support pointer events.
-   */
-  @bind
-  private _touchEnd (event: TouchEvent) {
-    for (const touch of Array.from(event.changedTouches)) {
-      this._triggerPointerEnd(new Pointer(touch), event);
-    }
-  }
-}
--- a/src/lib/PointerTracker/missing-types.d.ts
+++ b/src/lib/PointerTracker/missing-types.d.ts
@ -1,10 +0,0 @@
-// TypeScript, you make me sad.
-// https://github.com/Microsoft/TypeScript/issues/18756
-interface Window {
-  PointerEvent: typeof PointerEvent;
-  Touch: typeof Touch;
-}
-
-interface PointerEvent {
-  getCoalescedEvents(): PointerEvent[];
-}
--- a/src/lib/SnackBar/index.ts
+++ b/src/lib/SnackBar/index.ts
@ -1,114 +1,96 @@
-import './styles.css';
-
-const DEFAULT_TIMEOUT = 2750;
+import * as style from './styles.css';

 export interface SnackOptions {
-  message: string;
  timeout?: number;
-  actionText?: string;
-  actionHandler?: () => boolean | null;
+  actions?: string[];
 }

-export interface SnackShowResult {
-  action: boolean;
-}
+function createSnack(message: string, options: SnackOptions): [Element, Promise<string>] {
+  const {
+    timeout = 0,
+    actions = [],
+  } = options;

-class Snack {
-  private _onremove: ((result: SnackShowResult) => void)[] = [];
-  private _options: SnackOptions;
-  private _element: Element = document.createElement('div');
-  private _text: Element = document.createElement('div');
-  private _button: Element = document.createElement('button');
-  private _showing = false;
-  private _closeTimer?: number;
-  private _result: SnackShowResult = {
-    action: false,
-  };
+  // Provide a default 'dismiss' action
+  if (!timeout && actions.length === 0) actions.push('dismiss');

-  constructor (options: SnackOptions, callback?: (result: SnackShowResult) => void) {
-    this._options = options;
+  const el = document.createElement('div');
+  el.className = style.snackbar;
+  el.setAttribute('aria-live', 'assertive');
+  el.setAttribute('aria-atomic', 'true');
+  el.setAttribute('aria-hidden', 'false');

-    this._element.className = 'snackbar';
-    this._element.setAttribute('aria-live', 'assertive');
-    this._element.setAttribute('aria-atomic', 'true');
-    this._element.setAttribute('aria-hidden', 'true');
+  const text = document.createElement('div');
+  text.className = style.text;
+  text.textContent = message;
+  el.appendChild(text);

-    this._text.className = 'snackbar--text';
-    this._text.textContent = options.message;
-    this._element.appendChild(this._text);
+  const result = new Promise<string>((resolve) => {
+    let timeoutId: number;

-    if (options.actionText) {
-      this._button.className = 'snackbar--button';
-      this._button.textContent = options.actionText;
-      this._button.addEventListener('click', () => {
-        if (this._showing) {
-          if (options.actionHandler && options.actionHandler() === false) return;
-          this._result.action = true;
-        }
-        this.hide();
+    // Add action buttons
+    for (const action of actions) {
+      const button = document.createElement('button');
+      button.className = style.button;
+      button.textContent = action;
+      button.addEventListener('click', () => {
+        clearTimeout(timeoutId);
+        resolve(action);
      });
-      this._element.appendChild(this._button);
+      el.appendChild(button);
    }

-    if (callback) {
-      this._onremove.push(callback);
+    // Add timeout
+    if (timeout) {
+      timeoutId = self.setTimeout(
+        () => resolve(''),
+        timeout,
+      );
    }
-  }
-
-  cancelTimer () {
-    if (this._closeTimer != null) clearTimeout(this._closeTimer);
-  }
-
-  show (parent: Element): Promise<SnackShowResult> {
-    if (this._showing) return Promise.resolve(this._result);
-    this._showing = true;
-    this.cancelTimer();
-    if (parent !== this._element.parentNode) {
-      parent.appendChild(this._element);
-    }
-    this._element.removeAttribute('aria-hidden');
-    this._closeTimer = setTimeout(this.hide.bind(this), this._options.timeout || DEFAULT_TIMEOUT);
-    return new Promise((resolve) => {
-      this._onremove.push(resolve);
  });
-  }

-  hide () {
-    if (!this._showing) return;
-    this._showing = false;
-    this.cancelTimer();
-    this._element.addEventListener('animationend', this.remove.bind(this));
-    this._element.setAttribute('aria-hidden', 'true');
-  }
-
-  remove () {
-    this.cancelTimer();
-    const parent = this._element.parentNode;
-    if (parent) parent.removeChild(this._element);
-    this._onremove.forEach(f => f(this._result));
-    this._onremove = [];
-  }
+  return [el, result];
 }

 export default class SnackBarElement extends HTMLElement {
-  private _snackbars: Snack[] = [];
-  private _processingStack = false;
+  private _snackbars: [string, SnackOptions, (action: Promise<string>) => void][] = [];
+  private _processingQueue = false;

-  showSnackbar (options: SnackOptions): Promise<SnackShowResult> {
-    return new Promise((resolve) => {
-      const snack = new Snack(options, resolve);
-      this._snackbars.push(snack);
-      this._processStack();
+  /**
+   * Show a snackbar. Returns a promise for the name of the action clicked, or an empty string if no
+   * action is clicked.
+   */
+  showSnackbar(message: string, options: SnackOptions = {}): Promise<string> {
+    return new Promise<string>((resolve) => {
+      this._snackbars.push([message, options, resolve]);
+      if (!this._processingQueue) this._processQueue();
    });
  }

-  private async _processStack () {
-    if (this._processingStack === true || this._snackbars.length === 0) return;
-    this._processingStack = true;
-    await this._snackbars[0].show(this);
+  private async _processQueue() {
+    this._processingQueue = true;
+
+    while (this._snackbars[0]) {
+      const [message, options, resolver] = this._snackbars[0];
+      const [el, result] = createSnack(message, options);
+      // Pass the result back to the original showSnackbar call.
+      resolver(result);
+      this.appendChild(el);
+
+      // Wait for the user to click an action, or for the snack to timeout.
+      await result;
+
+      // Transition the snack away.
+      el.setAttribute('aria-hidden', 'true');
+      await new Promise((resolve) => {
+        el.addEventListener('animationend', () => resolve());
+      });
+      el.remove();
+
      this._snackbars.shift();
-    this._processingStack = false;
-    this._processStack();
+    }
+
+    this._processingQueue = false;
  }
 }

--- a/src/lib/SnackBar/styles.css
+++ b/src/lib/SnackBar/styles.css
@ -22,7 +22,6 @@ snack-bar {
  transform-origin: center;
  color: #eee;
  z-index: 100;
-  pointer-events: none;
  cursor: default;
  will-change: transform;
  animation: snackbar-show 300ms ease forwards 1;
@ -53,13 +52,13 @@ snack-bar {
  }
 }

-.snackbar--text {
+.text {
  flex: 1 1 auto;
  padding: 16px;
  font-size: 100%;
 }

-.snackbar--button {
+.button {
  position: relative;
  flex: 0 1 auto;
  padding: 8px;
@ -75,16 +74,15 @@ snack-bar {
  font-size: 100%;
  text-transform: uppercase;
  text-align: center;
-  pointer-events: all;
  cursor: pointer;
  overflow: hidden;
  transition: background-color 200ms ease;
  outline: none;
 }
-.snackbar--button:hover {
+.button:hover {
  background-color: rgba(0,0,0,0.15);
 }
-.snackbar--button:focus:before {
+.button:focus:before {
  content: '';
  position: absolute;
  left: 50%;
--- a/src/lib/icons.tsx
+++ b/src/lib/icons.tsx
@ -47,3 +47,28 @@ export const ExpandIcon = (props: JSX.HTMLAttributes) => (
    <path d="M16.6 8.6L12 13.2 7.4 8.6 6 10l6 6 6-6z"/>
  </Icon>
 );
+
+const copyAcrossRotations = {
+  up: 90, right: 180, down: -90, left: 0,
+};
+
+export interface CopyAcrossIconProps extends JSX.HTMLAttributes {
+  copyDirection: keyof typeof copyAcrossRotations;
+}
+
+export const CopyAcrossIcon = (props: CopyAcrossIconProps) => {
+  const { copyDirection, ...otherProps } = props;
+  const id = 'point-' + copyDirection;
+  const rotation = copyAcrossRotations[copyDirection];
+
+  return (
+    <Icon {...otherProps}>
+      <defs>
+        <clipPath id={id}>
+          <path d="M-12-12v24h24v-24zM4.5 2h-4v3l-5-5 5-5v3h4z" transform={`translate(12 13) rotate(${rotation})`}/>
+        </clipPath>
+      </defs>
+      <path clip-path={`url(#${id})`} d="M19 3h-4.2c-.4-1.2-1.5-2-2.8-2s-2.4.8-2.8 2H5a2 2 0 0 0-2 2v14c0 1.1.9 2 2 2h14a2 2 0 0 0 2-2V5a2 2 0 0 0-2-2zm-7 0a1 1 0 0 1 0 2c-.6 0-1-.4-1-1s.4-1 1-1z"/>
+    </Icon>
+  );
+};
--- a/src/lib/util.ts
+++ b/src/lib/util.ts
@ -57,16 +57,32 @@ export async function canvasEncode(data: ImageData, type: string, quality?: numb
  return blob;
 }

+async function decodeImage(url: string): Promise<HTMLImageElement> {
+  const img = new Image();
+  img.decoding = 'async';
+  img.src = url;
+  const loaded = new Promise((resolve, reject) => {
+    img.onload = () => resolve();
+    img.onerror = () => reject(Error('Image loading error'));
+  });
+
+  if (img.decode) {
+    // Nice off-thread way supported in Safari/Chrome.
+    // Safari throws on decode if the source is SVG.
+    // https://bugs.webkit.org/show_bug.cgi?id=188347
+    await img.decode().catch(() => null);
+  }
+
+  // Always await loaded, as we may have bailed due to the Safari bug above.
+  await loaded;
+  return img;
+}
+
 /**
 * Attempts to load the given URL as an image.
 */
-export function canDecodeImage(data: string): Promise<boolean> {
-  return new Promise((resolve) => {
-    const img = document.createElement('img');
-    img.src = data;
-    img.onload = _ => resolve(true);
-    img.onerror = _ => resolve(false);
-  });
+export function canDecodeImage(url: string): Promise<boolean> {
+  return decodeImage(url).then(() => true, () => false);
 }

 export function blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer> {
@ -108,24 +124,7 @@ export async function blobToImg(blob: Blob): Promise<HTMLImageElement> {
  const url = URL.createObjectURL(blob);

  try {
-    const img = new Image();
-    img.decoding = 'async';
-    img.src = url;
-    const loaded = new Promise((resolve, reject) => {
-      img.onload = () => resolve();
-      img.onerror = () => reject(Error('Image loading error'));
-    });
-
-    if (img.decode) {
-      // Nice off-thread way supported in Safari/Chrome.
-      // Safari throws on decode if the source is SVG.
-      // https://bugs.webkit.org/show_bug.cgi?id=188347
-      await img.decode().catch(() => null);
-    }
-
-    // Always await loaded, as we may have bailed due to the Safari bug above.
-    await loaded;
-    return img;
+    return await decodeImage(url);
  } finally {
    URL.revokeObjectURL(url);
  }
--- a/src/style/index.scss
+++ b/src/style/index.scss
@ -2,7 +2,6 @@

 html, body {
  height: 100%;
-  width: 100%;
  padding: 0;
  margin: 0;
  font: 12px/1.3 system-ui, -apple-system, BlinkMacSystemFont, Roboto, Helvetica, sans-serif;
--- a/webpack.config.js
+++ b/webpack.config.js
@ -25,6 +25,7 @@ module.exports = function (_, env) {
    path.join(__dirname, 'src/components'),
    path.join(__dirname, 'src/codecs'),
    path.join(__dirname, 'src/custom-els'),
+    path.join(__dirname, 'src/lib'),
  ];

  return {
@ -107,7 +108,7 @@ module.exports = function (_, env) {
              loader: 'typings-for-css-modules-loader',
              options: {
                modules: true,
-                localIdentName: '[local]__[hash:base64:5]',
+                localIdentName: isProd ? '[hash:base64:5]' : '[local]__[hash:base64:5]',
                namedExport: true,
                camelCase: true,
                importLoaders: 1,
@ -199,8 +200,11 @@ module.exports = function (_, env) {

      new OptimizeCssAssetsPlugin({
        cssProcessorOptions: {
-          zindex: false,
-          discardComments: { removeAll: true }
+          postcssReduceIdents: {
+            counterStyle: false,
+            gridTemplate: false,
+            keyframes: false
+          }
        }
      }),
Author	SHA1	Message	Date
Jake Archibald	2b5bfebf3c	Prevent software keyboard popping up again in Android Chrome.	2018-11-06 17:16:22 +00:00
Jake Archibald	01885dbbc1	Working around some glitching when page was scrolled.	2018-11-06 17:15:49 +00:00
Jake Archibald	556a98cb32	Prevent two-up being lost under options. Fixes #241 .	2018-11-06 17:15:15 +00:00
Jake Archibald	66aac12db7	Caught a bit of repetition in our utils (#242 ) Caught a bit of repetition in our utils	2018-11-06 14:19:48 +00:00
Jake Archibald	59cd1f8930	Splitting PointerTracker into its own project (#238 )	2018-11-06 14:19:24 +00:00
Jake Archibald	150e704d20	It's a dev package	2018-11-06 13:50:50 +00:00
Paul Kinlan	b2d47f0fb8	fixing a deps issue.	2018-11-06 13:50:49 +00:00
Paul Kinlan	bd3d33296d	Updating based on changes to filedrop element.	2018-11-06 13:50:49 +00:00
Paul Kinlan	f4c82ced97	#199 - Removes the file-drop custom element + Removes the custom element from the project + Replaces it with the externally maintined custom element	2018-11-06 13:50:48 +00:00
Jake Archibald	76188df0d3	Destructuring args.	2018-11-06 13:47:18 +00:00
Jake Archibald	9a58e4d339	Fixing lossless slider for webP. Previously you couldn't select "9" :D	2018-11-06 13:47:18 +00:00
Jake Archibald	f396a5b784	MozJPEG chroma subsampling and quality (#235 ) * Adding chroma subsampling for mozjpeg * Adding separate chroma quality. * Preact sometimes removes the inline styles, this fixes it. * Simplifying chroma subsample * Adding comments	2018-11-06 13:46:52 +00:00
Jake Archibald	e572b853e2	Snackbar defaults & copy undo (#233 ) * Fix snackbar defaults. Fixes #205. * Undo copy settings across. * Oops * Fixing stupid minification bug * Something weird happened with the last commit	2018-11-06 13:44:15 +00:00
Jake Archibald	726c2f195a	Fixing graphics glitch. Fixes #166 (#232 )	2018-11-06 13:41:08 +00:00
Jake Archibald	4599e51b1e	Copy to side ui (#229 ) * Copy settings to other side button * Download button on the outside. * Whoops	2018-11-06 13:39:03 +00:00
Jake Archibald	d93169cc5a	Mobile ui (#227 ) * Basic grid setup * Fixing thumb on two-up * Adding margin so you can still access the two-up * Allow multi-panel to keep one open only * Edge cases for one-open * Abstracting results so it can be used as a heading. * Ordering of items in mobile view. Changing scrolling element. * Adding labels to collapsed view * Adding height animation to multi-panel * Fixing animation bugs * Expand/collapse icon * Allow two-up and pinch-zoom to work beneath controls * Range bubble now behaves properly on mobile * No longer need this. * Prevent options overflow at larger widths	2018-11-06 13:37:52 +00:00