DisplayListExplorer/index.html at main · OpenSwiftUIProject/DisplayListExplorer · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="theme-color" content="#f7f8fa" />
    <meta
      name="description"
      content="Explore how SwiftUI DisplayList descriptions map to minimalDescription encodings."
    />
    <meta property="og:title" content="DisplayList Explorer" />
    <meta
      property="og:description"
      content="DisplayList description → minimalDescription, with linked ranges and encoding statistics."
    />
    <meta property="og:type" content="website" />
    <title>DisplayList Explorer</title>
    <link rel="icon" href="data:," />
    <link rel="stylesheet" href="./styles.css" />
  </head>
  <body>
    <header class="site-header">
      <a class="wordmark" href="./" aria-label="DisplayList Explorer home">
        <span class="wordmark-mark">DL</span>
        <span>DisplayList Explorer</span>
      </a>
      <div class="header-meta">
        <div id="wasm-status" class="status" role="status">Loading SwiftWasm…</div>
        <a class="github-link" href="https://github.com/OpenSwiftUIProject/DisplayListExplorer">
          Source code ↗
        </a>
      </div>
    </header>

    <main id="top">
      <section class="product-intro" aria-labelledby="page-title">
        <div>
          <h1 id="page-title">DisplayList Explorer</h1>
          <div class="conversion-direction">
            <p id="conversion-summary" class="conversion-summary">DisplayList.description → minimalDescription</p>
            <button
              id="direction-toggle"
              class="direction-toggle"
              type="button"
              aria-label="Swap conversion direction"
              title="Use the current output as the next input"
            >
              ⇄ Swap
            </button>
          </div>
        </div>
        <p>
          Paste either representation, swap direction when needed, then hover either side to follow
          each <code>minimalDescription</code> encoding.
        </p>
      </section>

      <section class="explorer" aria-label="DisplayList explorer">
        <article class="pane source-pane">
          <div class="pane-header">
            <div>
              <p class="pane-kicker">Source</p>
              <h2 id="source-title">DisplayList Description</h2>
            </div>
            <div class="pane-actions">
              <button id="sample-button" class="quiet-button" type="button">Load sample</button>
              <button id="clear-button" class="quiet-button" type="button">Clear</button>
            </div>
          </div>
          <div id="editor-container" class="editor-container">
            <div class="editor-loading">Loading editor…</div>
          </div>
        </article>

        <div
          id="pane-splitter"
          class="pane-splitter"
          role="separator"
          aria-label="Resize source and output panes"
          aria-orientation="vertical"
          aria-valuemin="20"
          aria-valuemax="80"
          aria-valuenow="50"
          title="Drag to resize panes; double-click to reset"
          tabindex="0"
        ></div>

        <article class="pane detail-pane">
          <div class="detail-toolbar">
            <div class="tabs" role="tablist" aria-label="DisplayList details">
              <button
                id="minimal-tab"
                class="tab is-active"
                type="button"
                role="tab"
                aria-selected="true"
                aria-controls="minimal-panel"
                data-tab="minimal"
              >
                <svg class="tab-icon" viewBox="0 0 24 24" aria-hidden="true">
                  <path d="m18 16 4-4-4-4"></path>
                  <path d="m6 8-4 4 4 4"></path>
                  <path d="m14.5 4-5 16"></path>
                </svg>
                <span id="output-tab-label">minimalDesc</span>
              </button>
              <button
                id="info-tab"
                class="tab"
                type="button"
                role="tab"
                aria-selected="false"
                aria-controls="info-panel"
                data-tab="info"
              >
                <svg class="tab-icon" viewBox="0 0 24 24" aria-hidden="true">
                  <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5Z"></path>
                  <polyline points="14 2 14 8 20 8"></polyline>
                  <line x1="8" x2="16" y1="13" y2="13"></line>
                  <line x1="8" x2="16" y1="17" y2="17"></line>
                </svg>
                <span>Info</span>
              </button>
              <button
                id="preview-tab"
                class="tab"
                type="button"
                role="tab"
                aria-selected="false"
                aria-controls="preview-panel"
                data-tab="preview"
              >
                <svg class="tab-icon" viewBox="0 0 24 24" aria-hidden="true">
                  <rect width="20" height="14" x="2" y="3" rx="2"></rect>
                  <line x1="8" x2="16" y1="21" y2="21"></line>
                  <line x1="12" x2="12" y1="17" y2="21"></line>
                </svg>
                <span>Preview</span>
              </button>
              <button
                id="statistics-tab"
                class="tab"
                type="button"
                role="tab"
                aria-selected="false"
                aria-controls="statistics-panel"
                data-tab="statistics"
              >
                <svg class="tab-icon" viewBox="0 0 24 24" aria-hidden="true">
                  <path d="M22 12h-4l-3 9L9 3l-3 9H2"></path>
                </svg>
                <span>Statistics</span>
              </button>
            </div>
            <div class="output-actions">
              <button id="share-button" class="share-button" type="button" disabled>Copy link</button>
              <button id="copy-button" class="copy-button" type="button" disabled>Copy</button>
            </div>
          </div>

          <section id="minimal-panel" class="tab-panel is-active" role="tabpanel" aria-labelledby="minimal-tab">
            <div class="panel-heading">
              <div>
                <p class="pane-kicker">Output</p>
                <h2 id="output-title">minimalDescription</h2>
              </div>
              <p id="mapping-summary" class="mapping-summary">Waiting for the converter…</p>
            </div>
            <pre id="minimal-output" class="minimal-output output-placeholder" aria-live="polite">Loading the Swift converter…</pre>
            <p id="conversion-error" class="error-message" role="alert" hidden></p>
            <div id="hover-inspector" class="hover-inspector" aria-live="polite">
              Hover a mapped element on either side to inspect its encoding.
            </div>
          </section>

          <section id="info-panel" class="tab-panel" role="tabpanel" aria-labelledby="info-tab" hidden>
            <div class="panel-heading info-heading">
              <div>
                <p class="pane-kicker">Reference</p>
                <h2>Encoding Info</h2>
              </div>
              <p>Tokens are context-dependent; this tab documents them without implying usage.</p>
            </div>
            <aside id="forward-limitation" class="limitation-note">
              <strong>Conversion limitation</strong>
              <span>
                An empty <code>(effect)</code> in the pasted description has lost its original effect type.
                When encountered, this tool uses the identity encoding <code>(E)</code> as a fallback.
              </span>
            </aside>
            <aside id="reverse-limitation" class="limitation-note" hidden>
              <strong>Lossy reconstruction</strong>
              <span>
                <code>?</code> marks an unknown value; <code>*</code> marks a payload or effect type
                that cannot be recovered from <code>minimalDescription</code>.
              </span>
            </aside>
            <div id="encoding-info" class="encoding-info">
              <p class="empty-state">Loading encoding definitions…</p>
            </div>
          </section>

          <section id="preview-panel" class="tab-panel" role="tabpanel" aria-labelledby="preview-tab" hidden>
            <div class="panel-heading preview-heading">
              <div>
                <p class="pane-kicker">Canvas approximation</p>
                <h2>DisplayList Preview</h2>
              </div>
              <div class="preview-heading-meta">
                <p id="preview-summary">No preview</p>
                <div class="preview-control-row">
                  <div class="preview-device-picker">
                    <button
                      id="preview-device-button"
                      class="preview-device-button"
                      type="button"
                      aria-label="Choose preview device"
                      aria-haspopup="listbox"
                      aria-expanded="false"
                      aria-controls="preview-device-menu"
                    >
                      <span class="preview-device-icon" aria-hidden="true">▣</span>
                      <span id="preview-device-label">iPhone 17 Pro</span>
                      <span id="preview-device-dimensions" class="preview-device-dimensions">402 × 874</span>
                      <span class="preview-device-chevron" aria-hidden="true">⌄</span>
                    </button>
                    <div id="preview-device-menu" class="preview-device-menu" role="listbox" aria-label="Preview device" hidden>
                      <button id="preview-device-iphone17pro" type="button" role="option" aria-selected="true">
                        <span>iPhone 17 Pro</span><span>402 × 874</span>
                      </button>
                      <button id="preview-device-iphone17promax" type="button" role="option" aria-selected="false">
                        <span>iPhone 17 Pro Max</span><span>440 × 956</span>
                      </button>
                      <button id="preview-device-iphoneair" type="button" role="option" aria-selected="false">
                        <span>iPhone Air</span><span>420 × 912</span>
                      </button>
                      <button id="preview-device-iphone16e" type="button" role="option" aria-selected="false">
                        <span>iPhone 16e</span><span>390 × 844</span>
                      </button>
                      <button id="preview-device-iphone15pro" type="button" role="option" aria-selected="false">
                        <span>iPhone 15 Pro</span><span>393 × 852</span>
                      </button>
                      <button id="preview-device-window" type="button" role="option" aria-selected="false">
                        <span>Window</span><span>Custom size</span>
                      </button>
                    </div>
                  </div>
                  <div id="preview-window-size" class="preview-window-size" role="group" aria-label="Window content size" hidden>
                    <input
                      id="preview-window-width"
                      type="number"
                      value="800"
                      min="100"
                      max="10000"
                      step="1"
                      inputmode="numeric"
                      aria-label="Window width in points"
                    />
                    <span aria-hidden="true">×</span>
                    <input
                      id="preview-window-height"
                      type="number"
                      value="600"
                      min="100"
                      max="10000"
                      step="1"
                      inputmode="numeric"
                      aria-label="Window height in points"
                    />
                    <span>pt</span>
                  </div>
                  <div class="preview-zoom-controls" role="group" aria-label="Preview zoom controls">
                    <button id="preview-zoom-out" type="button" aria-label="Zoom out" title="Zoom out">−</button>
                    <label class="preview-zoom-value" title="Enter a zoom percentage">
                      <input
                        id="preview-zoom-value"
                        type="number"
                        min="1"
                        max="1600"
                        step="1"
                        inputmode="decimal"
                        aria-label="Preview zoom percentage"
                        placeholder="—"
                        disabled
                      />
                      <span aria-hidden="true">%</span>
                    </label>
                    <button id="preview-zoom-in" type="button" aria-label="Zoom in" title="Zoom in">+</button>
                  </div>
                  <button
                    id="preview-zoom-fit"
                    class="preview-zoom-fit is-active"
                    type="button"
                    aria-label="Fit preview to canvas"
                    aria-pressed="true"
                  >Fit</button>
                </div>
              </div>
            </div>
            <div id="preview-surface" class="preview-surface" aria-label="Draggable device preview">
              <canvas id="preview-canvas" class="preview-canvas" aria-label="Rendered DisplayList preview"></canvas>
              <p id="preview-empty" class="preview-empty">Paste a DisplayList description to preview it.</p>
              <div id="preview-scale" class="preview-scale" hidden>
                <span id="preview-scale-label" class="preview-scale-label">100 pt</span>
                <span id="preview-scale-rule" class="preview-scale-rule" aria-hidden="true"></span>
              </div>
            </div>
            <p class="preview-footnote">
              Layout, resolved colors, opacity, transforms, clips, and path geometry are reproduced when present.
              Drag to move the selected device. Missing image, font, paint, and platform payloads use approximations or placeholders.
            </p>
          </section>

          <section
            id="statistics-panel"
            class="tab-panel"
            role="tabpanel"
            aria-labelledby="statistics-tab"
            hidden
          >
            <div class="panel-heading statistics-heading">
              <div>
                <p class="pane-kicker">Current input</p>
                <h2>Encoding Statistics</h2>
              </div>
              <p id="statistics-summary">No mapped encodings yet.</p>
            </div>
            <div id="encoding-statistics" class="statistics-content">
              <p class="empty-state">Paste a DisplayList description to see occurrence counts.</p>
            </div>
          </section>
        </article>
      </section>

      <section class="privacy-note" aria-label="About this tool">
        <span>Runs locally</span>
        <p>The parser is written in Swift and executes in your browser as WebAssembly. No DisplayList data leaves this page.</p>
      </section>
    </main>

    <footer>
      <span>DisplayList Explorer</span>
      <span>SwiftWasm · OpenSwiftUIProject</span>
    </footer>

    <script type="module" src="./main.js"></script>
  </body>
</html>