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Copy pathscript.js
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8073 lines (6958 loc) · 332 KB
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/**
* HTML Code Previewer
*
* Main application object containing all functionality for the HTML/CSS/JS previewer.
*
* STRUCTURE:
* - state: Application state (editors, files, mode, panel/order state)
* - dom: Cached DOM elements
* - constants: Configuration constants (IDs, file types, MIME types)
* - fileTypeUtils: File type detection and handling utilities
* - fileSystemUtils: Virtual file system runtime operations (path resolution, file lookup, data URLs)
* - previewScriptGenerator: Code-generation utilities — produces JS strings injected into the preview iframe
* - init(): Application initialization
* - Editor Management: initEditors(), createEditorForTextarea(), etc.
* - File Management: addNewFile(), importFile(), exportFile(), etc.
* - Preview Management: renderPreview(), toggleModal(), etc.
* - UI Management: eventManager.bindAll(), switchMode(), etc.
* - htmlGenerators: HTML generation utilities
* - notificationSystem: Toast notifications
* - assetReplacers: Asset path replacement for multi-file projects
* - consoleBridge: Console capture and logging
*
*/
const SVG_ICONS = {
// UI Action Icons
settings: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><line x1="2" y1="4" x2="14" y2="4"/><line x1="2" y1="8" x2="14" y2="8"/><line x1="2" y1="12" x2="14" y2="12"/><circle cx="5" cy="4" r="1.5" fill="currentColor"/><circle cx="10" cy="8" r="1.5" fill="currentColor"/><circle cx="7" cy="12" r="1.5" fill="currentColor"/></svg>',
trash: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M3 4h10l-1 10H4L3 4z"/><path d="M1 4h14"/><path d="M6 4V2.5a.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 .5.5V4"/><line x1="6.5" y1="7" x2="6.5" y2="11"/><line x1="9.5" y1="7" x2="9.5" y2="11"/></svg>',
package: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M8 1L14 4v8l-6 3L2 12V4l6-3z"/><path d="M8 8v7"/><path d="M2 4l6 4 6-4"/></svg>',
folder: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1.5 3.5h4l2 2h7v8h-13v-10z"/></svg>',
folderOpen: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1.5 3.5h4l2 2h7v2"/><path d="M1.5 13.5l2-6h12l-2 6h-12z"/></svg>',
folderTabs: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1.5 3.5h4l2 2h7v8h-13v-10z"/><path d="M5 3.5V1.5h4v2"/></svg>',
clipboard: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="2.5" width="10" height="12" rx="1"/><path d="M5.5 2.5V2a.5.5 0 0 1 .5-.5h4a.5.5 0 0 1 .5.5v.5"/><line x1="5.5" y1="7" x2="10.5" y2="7"/><line x1="5.5" y1="9.5" x2="10.5" y2="9.5"/><line x1="5.5" y1="12" x2="8.5" y2="12"/></svg>',
document: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 1.5h5.5L13 5v9.5H4V1.5z"/><path d="M9 1.5v4h4"/></svg>',
search: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="6.5" cy="6.5" r="4.5"/><line x1="10" y1="10" x2="14.5" y2="14.5"/></svg>',
format: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="13" x2="10" y2="2"/><path d="M10 2l1.5 3"/><path d="M1 6l2-2 2 2"/><circle cx="12.5" cy="3.5" r="0.75" fill="currentColor" stroke="none"/></svg>',
expand: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="10,2 14,2 14,6"/><polyline points="6,14 2,14 2,10"/><line x1="14" y1="2" x2="9.5" y2="6.5"/><line x1="2" y1="14" x2="6.5" y2="9.5"/></svg>',
save: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M2 1.5h9.5L14 4v10.5H2V1.5z"/><rect x="4.5" y="1.5" width="5" height="4"/><rect x="4.5" y="9.5" width="7" height="5"/></svg>',
close: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="3" x2="13" y2="13"/><line x1="13" y1="3" x2="3" y2="13"/></svg>',
dock: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><rect x="1.5" y="2" width="13" height="12" rx="1"/><line x1="10" y1="2" x2="10" y2="14"/></svg>',
refresh: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M13 3v4H9"/><path d="M3 13v-4h4"/><path d="M4.1 6.1A5 5 0 0 1 13 7"/><path d="M11.9 9.9A5 5 0 0 1 3 9"/></svg>',
eye: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1 8s2.5-5 7-5 7 5 7 5-2.5 5-7 5-7-5-7-5z"/><circle cx="8" cy="8" r="2"/></svg>',
pencil: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M11.5 1.5l3 3-9 9H2.5v-3l9-9z"/></svg>',
move: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><line x1="2" y1="8" x2="14" y2="8"/><polyline points="10,4 14,8 10,12"/></svg>',
check: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="3,8.5 6.5,12 13,4"/></svg>',
checkCircle: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="8" cy="8" r="6.5"/><polyline points="5,8.5 7,10.5 11,5.5"/></svg>',
xCircle: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="8" cy="8" r="6.5"/><line x1="5.5" y1="5.5" x2="10.5" y2="10.5"/><line x1="10.5" y1="5.5" x2="5.5" y2="10.5"/></svg>',
info: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="8" cy="8" r="6.5"/><line x1="8" y1="7.5" x2="8" y2="11.5"/><circle cx="8" cy="5" r="0.75" fill="currentColor" stroke="none"/></svg>',
warning: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M8 1.5L1 14h14L8 1.5z"/><line x1="8" y1="6" x2="8" y2="10"/><circle cx="8" cy="12" r="0.75" fill="currentColor" stroke="none"/></svg>',
folderPlus: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1.5 3.5h4l2 2h7v8h-13v-10z"/><line x1="8" y1="7.5" x2="8" y2="11.5"/><line x1="6" y1="9.5" x2="10" y2="9.5"/></svg>',
folderMinus: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1.5 3.5h4l2 2h7v8h-13v-10z"/><line x1="6" y1="9.5" x2="10" y2="9.5"/></svg>',
// File Type Icons
fileHtml: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="8" cy="8" r="6.5"/><ellipse cx="8" cy="8" rx="3" ry="6.5"/><path d="M1.5 8h13"/></svg>',
fileCss: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M5 14l-1-4 3-2-3-2 1-4"/><circle cx="12" cy="4" r="2"/><line x1="12" y1="6" x2="12" y2="12"/><path d="M10 12a2 2 0 1 0 4 0"/></svg>',
fileJs: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="4,4 1.5,8 4,12"/><polyline points="12,4 14.5,8 12,12"/></svg>',
fileJson: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M5 2c-2 0-2 2-2 3v1.5c0 1-1 1.5-1.5 1.5 .5 0 1.5.5 1.5 1.5V11c0 1 0 3 2 3"/><path d="M11 2c2 0 2 2 2 3v1.5c0 1 1 1.5 1.5 1.5-.5 0-1.5.5-1.5 1.5V11c0 1 0 3-2 3"/></svg>',
fileXml: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 1.5h5.5L13 5v9.5H4V1.5z"/><path d="M9 1.5v4h4"/><polyline points="6,9 5,11 6,13"/><polyline points="10,9 11,11 10,13"/></svg>',
fileMarkdown: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 1.5h5.5L13 5v9.5H4V1.5z"/><path d="M9 1.5v4h4"/><path d="M6.5 9v4h1v-2.5L9 12l1.5-1.5V13h1V9"/></svg>',
fileText: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 1.5h5.5L13 5v9.5H4V1.5z"/><path d="M9 1.5v4h4"/><line x1="6" y1="8" x2="11" y2="8"/><line x1="6" y1="10.5" x2="11" y2="10.5"/><line x1="6" y1="13" x2="9" y2="13"/></svg>',
fileImage: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><rect x="1.5" y="2" width="13" height="12" rx="1"/><circle cx="5" cy="5.5" r="1.5"/><path d="M1.5 12l4-4 3 3 2-2 4 4"/></svg>',
fileAudio: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M2 6v4h3l4 3V3L5 6H2z"/><path d="M11 5.5a3.5 3.5 0 0 1 0 5"/><path d="M12.5 3.5a6 6 0 0 1 0 9"/></svg>',
fileVideo: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><rect x="1.5" y="3" width="13" height="10" rx="1"/><path d="M6 6.5v3l3-1.5-3-1.5z"/></svg>',
fileFont: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 14l4-12 4 12"/><line x1="5.5" y1="10" x2="10.5" y2="10"/><line x1="3" y1="14" x2="5" y2="14"/><line x1="11" y1="14" x2="13" y2="14"/></svg>',
filePdf: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 1.5h5.5L13 5v9.5H4V1.5z"/><path d="M9 1.5v4h4"/><path d="M6 9h1.5a1.25 1.25 0 0 0 0-2.5H6v6"/></svg>',
fileBinary: '<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M8 1L14 4v8l-6 3L2 12V4l6-3z"/><path d="M8 8v7"/><path d="M2 4l6 4 6-4"/></svg>',
};
// ============================================================================
// STANDALONE UTILITY FUNCTIONS
// Pure functions with no dependency on CodePreviewer instance.
// ============================================================================
const escapeHtml = (str) => {
if (str === null || str === undefined) return '';
return String(str)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/"/g, '"')
.replace(/'/g, ''');
};
const base64ToUint8Array = (base64) => {
const binaryString = atob(base64);
const bytes = new Uint8Array(binaryString.length);
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes;
};
const formatFileSize = (bytes) => {
const normalized = Number.isFinite(bytes) && bytes >= 0 ? bytes : 0;
if (normalized < 1024) return `${normalized} B`;
const units = ['KB', 'MB', 'GB'];
let size = normalized;
let unitIndex = -1;
while (size >= 1024 && unitIndex < units.length - 1) {
size /= 1024;
unitIndex += 1;
}
const roundedSize = size >= 10 ? Math.round(size) : Math.round(size * 10) / 10;
return `${roundedSize} ${units[unitIndex]}`;
};
const getLineCount = (content) => {
return content.length === 0 ? 1 : content.split(/\r\n|\r|\n/).length;
};
function createMockEditor(textarea, fontSize) {
if (!textarea) return null;
Object.assign(textarea.style, {
fontFamily: 'monospace', fontSize: `${fontSize}px`, lineHeight: '1.5',
resize: 'none', border: 'none', outline: 'none',
background: '#282a36', color: '#f8f8f2', padding: '1rem',
width: '100%', height: '400px'
});
return {
setValue: (value) => { textarea.value = value; },
getValue: () => textarea.value,
refresh: () => {},
setOption: () => {},
on: (eventName, handler) => {
if (eventName !== 'change' || !handler) return;
if (textarea.__changeListener) {
textarea.removeEventListener('input', textarea.__changeListener);
}
textarea.__changeListener = () => handler(null, { origin: '+input' });
textarea.addEventListener('input', textarea.__changeListener);
},
};
}
function findNextMatch(content, query, startIndex) {
if (!content || !query) return -1;
const lowerContent = content.toLowerCase();
const lowerQuery = query.toLowerCase();
let matchIndex = lowerContent.indexOf(lowerQuery, startIndex);
if (matchIndex === -1 && startIndex > 0) {
matchIndex = lowerContent.indexOf(lowerQuery);
}
return matchIndex;
}
/**
* Recursively freezes an object and all its nested objects.
* @param {Object} obj - The object to deep-freeze
* @returns {Object} The frozen object
*/
const deepFreeze = (obj) => {
Object.freeze(obj);
Object.values(obj).forEach(val => {
if (val && typeof val === 'object' && !Object.isFrozen(val)) {
deepFreeze(val);
}
});
return obj;
};
/**
* Handles preview rendering concerns such as debouncing and runtime fallback UI.
*/
class PreviewRenderer {
/**
* @param {typeof CodePreviewer} app
*/
constructor(app) {
this.app = app;
}
/**
* Debounce preview refresh requests to reduce expensive iframe updates while typing.
*/
scheduleRefresh() {
const { state } = this.app;
clearTimeout(state.previewRefreshTimer);
state.previewRefreshTimer = setTimeout(() => {
state.previewRefreshTimer = null;
this.safeRefreshOpenPreviews();
}, state.previewRefreshDelay);
}
/**
* Triggers a preview render to the requested target.
* Validates HTML availability before proceeding.
* @param {'modal'|'tab'} target - Where to display the preview
*/
render(target) {
const availability = this.app.getPreviewAvailability();
if (!availability.allowed) {
this.app.showNotification('No HTML file found. Import or create an HTML file to preview.', 'warn');
this.app.updatePreviewActionButtons();
return;
}
// Always revoke previous asset URLs before generating new ones to avoid leaks.
this.app.revokeTrackedObjectUrls(this.app.state.previewAssetUrls);
this.app.state.previewBlobUrlCache.clear();
const content = this.app.generatePreviewContent();
if (target === 'modal') {
this.app.consoleBridge.clear();
this.safeWritePreviewFrame(content);
this.app.toggleModal(true);
return;
}
if (target === 'tab') {
try {
this.app.updatePreviewTab(content, true);
this.app.showNotification('Preview opened in a new tab.', 'success');
} catch (error) {
console.error('Failed to create or open new tab:', error);
this.app.showNotification('Unable to open preview tab. Check popup settings and try again.', 'error');
}
}
}
/**
* Safely refresh already-open preview targets (modal and/or tab).
* On failure, writes an error document to the iframe instead of silently breaking.
*/
safeRefreshOpenPreviews() {
try {
this.app.refreshOpenPreviews();
} catch (error) {
console.error('Preview refresh failed:', error);
this.app.showNotification('Preview refresh failed. The editor content is unchanged.', 'error');
this.safeWritePreviewFrame(this.buildPreviewErrorDocument(error));
}
}
/**
* Writes an HTML string to the preview iframe's srcdoc.
* On failure, replaces the content with a formatted error document.
* @param {string} content - Complete HTML document string
*/
safeWritePreviewFrame(content) {
if (!this.app.dom.previewFrame) return;
try {
this.app.dom.previewFrame.srcdoc = content;
} catch (error) {
console.error('Unable to render preview iframe:', error);
this.app.dom.previewFrame.srcdoc = this.buildPreviewErrorDocument(error);
this.app.showNotification('Unable to render preview content. See details in preview pane.', 'error');
}
}
/**
* Builds a self-contained HTML error document for display inside the preview iframe.
* @param {unknown} error - The caught error value
* @returns {string} A minimal HTML document string
*/
buildPreviewErrorDocument(error) {
const errorText = escapeHtml(error instanceof Error ? error.message : String(error));
return `<!doctype html><html lang="en"><head><meta charset="utf-8"><title>Preview Error</title></head><body style="font-family:Arial,sans-serif;background:#121219;color:#f8f8ff;padding:16px;"><h2 style="margin-top:0;">Preview rendering error</h2><p>The preview could not be generated safely.</p><pre style="white-space:pre-wrap;background:#1d1f2e;padding:12px;border-radius:8px;border:1px solid #34364d;">${errorText}</pre></body></html>`;
}
}
/**
* Persists and restores user preferences via localStorage.
* All I/O is wrapped in try/catch so a corrupt or missing entry never
* prevents the application from starting.
*/
class StorageHandler {
/**
* @param {typeof CodePreviewer} app
*/
constructor(app) {
this.app = app;
}
/**
* Reads settings from localStorage and merges them into the current state.
* Silently ignores missing, malformed, or unreadable data.
* @returns {void}
*/
loadSettings() {
try {
const raw = localStorage.getItem(this.app.constants.SETTINGS_STORAGE_KEY);
if (!raw) return;
const parsed = JSON.parse(raw);
this.app.state.settings = this.app.normalizeSettings({
...this.app.state.settings,
...parsed,
});
} catch (error) {
console.warn('Unable to load settings:', error);
}
}
/**
* Serializes the current settings object to localStorage.
* Silently ignores QuotaExceededError and other write failures.
* @returns {void}
*/
saveSettings() {
try {
localStorage.setItem(
this.app.constants.SETTINGS_STORAGE_KEY,
JSON.stringify(this.app.state.settings)
);
} catch (error) {
console.warn('Unable to save settings:', error);
}
}
}
class EventManager {
/**
* @param {typeof CodePreviewer} app
*/
constructor(app) {
this.app = app;
}
/**
* Entry point — wires every category of events.
* Called once during init().
*/
bindAll() {
this.bindPrimaryActions();
this.bindConsoleActions();
this.bindPreviewDock();
this.bindModalOverlay();
this.bindKeyboard();
this.bindCodeModal();
this.bindMediaModal();
this.bindFileActions();
this.bindSettingsModal();
this.bindViewportResize();
}
// ─── Preview ──────────────────────────────────────────────────────────────
/**
* Binds the primary preview action buttons (modal / tab).
*/
bindPrimaryActions() {
this.app.dom.modalBtn.addEventListener('click', () => this.app.renderPreview('modal'));
this.app.dom.tabBtn.addEventListener('click', () => this.app.renderPreview('tab'));
this.app.dom.closeModalBtn.addEventListener('click', () => this.app.toggleModal(false));
this.app.dom.refreshPreviewBtn?.addEventListener('click', () => this.app.refreshModalPreview());
}
// ─── Console ──────────────────────────────────────────────────────────────
/**
* Binds console toggle button and console resize divider.
*/
bindConsoleActions() {
this.app.dom.toggleConsoleBtn.addEventListener('click', () => this.app.toggleConsole());
this.app.dom.consoleResizeDivider?.addEventListener(
'pointerdown',
(e) => this.app.startConsoleResize(e)
);
}
// ─── Preview Dock ─────────────────────────────────────────────────────────
/**
* Binds dock toggle and resize-divider drag events.
*/
bindPreviewDock() {
this.app.dom.dockPreviewBtn?.addEventListener('click', () => this.app.togglePreviewDock());
this.app.dom.previewDockDivider?.addEventListener(
'pointerdown',
(e) => this.app.startPreviewDockResize(e)
);
}
// ─── Modal Overlay ────────────────────────────────────────────────────────
/**
* Closes the preview modal when the backdrop is clicked (undocked mode only).
*/
bindModalOverlay() {
this.app.dom.modalOverlay.addEventListener('click', (e) => {
if (this.app.state.isPreviewDocked) return;
if (e.target === this.app.dom.modalOverlay) this.app.toggleModal(false);
});
}
// ─── Global Keyboard ──────────────────────────────────────────────────────
/**
* Binds application-wide keyboard shortcuts.
*/
bindKeyboard() {
document.addEventListener('keydown', (e) => {
const { app } = this;
const activePanel = app.getActiveEditorPanel();
if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') {
e.preventDefault();
app.renderPreview('modal');
return;
}
if ((e.ctrlKey || e.metaKey) && !e.shiftKey && e.key.toLowerCase() === 'k') {
e.preventDefault();
app.focusSidebarSearch();
return;
}
if ((e.ctrlKey || e.metaKey) && !e.shiftKey && e.key.toLowerCase() === 'f') {
const codeModal = app.dom.codeModal;
const isCodeModalOpen = codeModal?.getAttribute('aria-hidden') === 'false';
if (isCodeModalOpen) {
e.preventDefault();
app.openCodeModalSearch();
} else if (activePanel) {
e.preventDefault();
app.openPanelSearch(activePanel);
}
return;
}
if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key.toLowerCase() === 'e' && activePanel) {
e.preventDefault();
app.expandCode(activePanel);
return;
}
if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key.toLowerCase() === 'f' && activePanel) {
e.preventDefault();
app.formatPanelCode(activePanel, false);
return;
}
if (e.key === 'Escape') {
if (app.dom.modalOverlay.getAttribute('aria-hidden') === 'false') {
app.toggleModal(false);
}
app.toggleSettingsModal(false);
if (app.dom.codeModal?.getAttribute('aria-hidden') === 'false') {
app.closeCodeModal();
}
if (app.dom.mediaModal?.getAttribute('aria-hidden') === 'false') {
app.closeMediaModal();
}
}
});
}
// ─── Code Modal ───────────────────────────────────────────────────────────
/**
* Binds code-view modal close and search actions.
*/
bindCodeModal() {
const { app } = this;
const codeModalCloseBtn = app.dom.codeModal?.querySelector('.close-btn');
if (codeModalCloseBtn) {
codeModalCloseBtn.addEventListener('click', () => app.closeCodeModal());
}
if (app.dom.codeModal) {
app.dom.codeModal.addEventListener('click', (e) => {
if (e.target === app.dom.codeModal) app.closeCodeModal();
});
}
if (app.dom.codeModalDockBtn) {
app.dom.codeModalDockBtn.addEventListener('click', () => app.toggleCodeModalDockLeft());
}
if (app.dom.codeModalSearchBtn) {
app.dom.codeModalSearchBtn.addEventListener('click', () => app.toggleCodeModalSearch());
}
if (app.dom.codeModalSearchInput) {
app.dom.codeModalSearchInput.addEventListener('input', () => app.searchInCodeModal(false));
app.dom.codeModalSearchInput.addEventListener('keydown', (e) => {
if (e.key === 'Enter') {
e.preventDefault();
app.searchInCodeModal(true);
}
});
}
if (app.dom.codeModalSearchNextBtn) {
app.dom.codeModalSearchNextBtn.addEventListener('click', () => app.searchInCodeModal(true));
}
if (app.dom.codeModalSearchCloseBtn) {
app.dom.codeModalSearchCloseBtn.addEventListener('click', () => app.closeCodeModalSearch());
}
}
// ─── Media Modal ──────────────────────────────────────────────────────────
/**
* Binds media preview modal close action.
*/
bindMediaModal() {
const { app } = this;
const mediaModalCloseBtn = app.dom.mediaModal?.querySelector('.close-btn');
if (mediaModalCloseBtn) {
mediaModalCloseBtn.addEventListener('click', () => app.closeMediaModal());
}
if (app.dom.mediaModal) {
app.dom.mediaModal.addEventListener('click', (e) => {
if (e.target === app.dom.mediaModal) app.closeMediaModal();
});
}
}
// ─── File Actions ─────────────────────────────────────────────────────────
/**
* Binds file management toolbar buttons (add, import, export, clear).
*/
bindFileActions() {
const { app } = this;
app.dom.addFileBtn.addEventListener('click', () => app.addNewFile());
app.dom.addFolderBtn?.addEventListener('click', () => app.addNewFolder());
app.dom.clearAllFilesBtn?.addEventListener('click', () => app.clearAllFiles());
app.dom.importFileBtn.addEventListener('click', () => app.importFile());
app.dom.importFolderBtn?.addEventListener('click', () => app.importFolder());
app.dom.importZipBtn.addEventListener('click', () => app.importArchive());
app.dom.exportZipBtn.addEventListener('click', () => app.exportZip());
app.setupMainHtmlDropdownEvents();
// Close custom dropdowns when clicking outside their boundaries
document.addEventListener('click', (e) => {
if (!e.target.closest('.file-type-dropdown')) app.closeAllFileTypeDropdowns();
if (!e.target.closest('.settings-select-dropdown')) app.closeAllSettingsSelectDropdowns();
});
}
// ─── Settings Modal ───────────────────────────────────────────────────────
/**
* Binds settings button, settings modal close/backdrop, and all setting controls.
* Uses a declarative binding table to eliminate repetitive handler blocks.
*/
bindSettingsModal() {
const { app } = this;
app.dom.settingsBtn?.addEventListener('click', () => app.toggleSettingsModal(true));
if (!app.dom.settingsModal) return;
// Close on backdrop click
app.dom.settingsModal.addEventListener('click', (e) => {
if (e.target === app.dom.settingsModal) app.toggleSettingsModal(false);
});
// Custom dropdown: open/select
app.dom.settingsModal.addEventListener('click', (e) => {
const trigger = e.target.closest('.settings-select-dropdown-trigger');
if (trigger) {
app.toggleSettingsSelectDropdown(trigger.closest('.settings-select-dropdown'));
return;
}
const option = e.target.closest('.settings-select-dropdown-option');
if (option) {
app.selectSettingsDropdownOption(option.closest('.settings-select-dropdown'), option);
}
});
// Custom dropdown: keyboard navigation
app.dom.settingsModal.addEventListener('keydown', (e) => {
const dropdown = e.target.closest('.settings-select-dropdown');
if (!dropdown) return;
if (e.key === 'ArrowDown') {
e.preventDefault();
app.toggleSettingsSelectDropdown(dropdown, true);
app.moveSettingsDropdownFocus(dropdown, 1);
} else if (e.key === 'ArrowUp') {
e.preventDefault();
app.toggleSettingsSelectDropdown(dropdown, true);
app.moveSettingsDropdownFocus(dropdown, -1);
} else if (e.key === 'Enter' || e.key === ' ') {
const option = e.target.closest('.settings-select-dropdown-option');
if (option) {
e.preventDefault();
app.selectSettingsDropdownOption(dropdown, option);
} else if (e.target.closest('.settings-select-dropdown-trigger')) {
e.preventDefault();
app.toggleSettingsSelectDropdown(dropdown);
}
}
});
// Close button
const settingsCloseBtn = app.dom.settingsModal.querySelector('.close-btn');
if (settingsCloseBtn) {
settingsCloseBtn.addEventListener('click', () => app.toggleSettingsModal(false));
}
// ESC to close (registered once on document to avoid duplicates)
if (!app.state.settingsEscHandler) {
app.state.settingsEscHandler = (e) => {
if (e.key === 'Escape' && app.isSettingsModalOpen()) {
const hasOpenDropdown = !!app.dom.settingsModal?.querySelector(
'.settings-select-dropdown-trigger[aria-expanded="true"]'
);
if (hasOpenDropdown) {
app.closeAllSettingsSelectDropdowns();
return;
}
app.toggleSettingsModal(false);
}
};
document.addEventListener('keydown', app.state.settingsEscHandler);
}
this._bindSettingControls();
}
/**
* Declarative table-driven binding for individual setting controls.
* Each entry maps a DOM element to a state property and a value reader.
* This replaces nine near-identical if-block handlers.
* @private
*/
_bindSettingControls() {
const { app } = this;
/** @type {Array<{domKey: string, stateKey: string, readValue: function, refreshEditors?: boolean}>} */
const SETTING_BINDINGS = [
{ domKey: 'settingLineNumbers', stateKey: 'lineNumbers', readValue: (el) => el.checked, refreshEditors: true },
{ domKey: 'settingLineWrap', stateKey: 'lineWrapping', readValue: (el) => el.checked, refreshEditors: true },
{ domKey: 'settingAutoFormat', stateKey: 'autoFormatOnType', readValue: (el) => el.checked, refreshEditors: false },
{ domKey: 'settingFontSize', stateKey: 'fontSize', readValue: (el) => Number(el.value) || 14, refreshEditors: true },
{ domKey: 'settingEditorTheme', stateKey: 'theme', readValue: (el) => el.value || 'dracula', refreshEditors: true },
{ domKey: 'settingTabSize', stateKey: 'tabSize', readValue: (el) => Number(el.value) || 4, refreshEditors: true },
{ domKey: 'settingIndentWithTabs', stateKey: 'indentWithTabs', readValue: (el) => el.checked, refreshEditors: true },
{ domKey: 'settingAutoCloseBrackets', stateKey: 'autoCloseBrackets', readValue: (el) => el.checked, refreshEditors: true },
{ domKey: 'settingMatchBrackets', stateKey: 'matchBrackets', readValue: (el) => el.checked, refreshEditors: true },
];
const applySetting = (updateFn, { refreshEditors = false } = {}) => {
updateFn();
app.state.settings = app.normalizeSettings(app.state.settings);
app.syncSettingsUI();
if (refreshEditors) app.applyEditorSettingsToAllEditors();
app.saveSettings();
};
SETTING_BINDINGS.forEach(({ domKey, stateKey, readValue, refreshEditors }) => {
const el = app.dom[domKey];
if (!el) return;
el.addEventListener('change', () => {
applySetting(() => { app.state.settings[stateKey] = readValue(el); }, { refreshEditors });
});
});
}
// ─── Viewport Resize ──────────────────────────────────────────────────────
/**
* Registers debounced window-resize and visualViewport-resize handlers.
* Guards against duplicate registration.
*/
bindViewportResize() {
const { app } = this;
if (!app.state.viewportResizeHandler) {
app.state.viewportResizeHandler = () => {
clearTimeout(app.state.viewportResizeTimer);
app.state.viewportResizeTimer = setTimeout(() => {
app.updatePanelMoveButtonDirections();
app.updateCodeModalHeaderAndButtons();
app.updateAdaptiveLayoutMode();
app.updateDockedModalCompactModes();
}, 80);
};
// A single named handler avoids creating a second anonymous wrapper for dock resize.
const onWindowResize = () => {
app.state.viewportResizeHandler();
app.handleDockViewportResize();
};
window.addEventListener('resize', onWindowResize);
}
if (!app.state.visualViewportResizeHandler && window.visualViewport) {
app.state.visualViewportResizeHandler = () => {
app.updatePreviewViewportHeight();
app.handleDockViewportResize();
};
window.visualViewport.addEventListener('resize', app.state.visualViewportResizeHandler);
window.visualViewport.addEventListener('scroll', app.state.visualViewportResizeHandler);
}
}
}
class FileTypeUtils {
constructor(constants) {
this.constants = constants;
this.BINARY_MIME_PREFIXES = ['image/', 'audio/', 'video/', 'application/', 'font/'];
this.JS_MIME_TYPES = new Set(['text/javascript', 'application/javascript', 'application/x-javascript', 'text/ecmascript', 'application/ecmascript']);
this.MODULE_FILENAME_SUFFIXES = ['.mjs', '.esm.js', '.module.js'];
}
getBaseName(filename) {
if (typeof filename !== 'string') return '';
const normalizedPath = filename.trim().replace(/\\/g, '/');
if (!normalizedPath) return '';
const pathSegments = normalizedPath.split('/');
return (pathSegments.pop() || '').toLowerCase();
}
getExtension(filename) {
const baseName = this.getBaseName(filename);
if (!baseName || baseName === '.' || baseName === '..') return '';
const lastDotIndex = baseName.lastIndexOf('.');
if (lastDotIndex === -1) return '';
if (lastDotIndex === 0) return baseName.slice(1).toLowerCase();
return baseName.slice(lastDotIndex + 1).toLowerCase();
}
normalizeMimeType(mimeType) {
if (!mimeType || typeof mimeType !== 'string') return '';
return mimeType.toLowerCase().split(';')[0].trim();
}
getTypeFromExtension(filename) {
const extension = this.getExtension(filename);
return this.constants.EXTENSIONS[extension] || 'binary';
}
getMimeTypeFromExtension(extension) {
const normalizedExtension = extension?.toLowerCase();
return this.constants.EXTENSION_MIME_MAP[normalizedExtension] || 'application/octet-stream';
}
getMimeTypeFromFileType(fileType) {
return this.constants.MIME_TYPES[fileType] || 'text/plain';
}
getTypeFromMimeType(mimeType) {
const normalizedMimeType = this.normalizeMimeType(mimeType);
if (!normalizedMimeType) return null;
if (this.JS_MIME_TYPES.has(normalizedMimeType)) return 'javascript';
if (normalizedMimeType === 'text/html') return 'html';
if (normalizedMimeType === 'text/css') return 'css';
if (normalizedMimeType === 'application/json' || normalizedMimeType.endsWith('+json')) return 'json';
if (normalizedMimeType === 'application/xml' || normalizedMimeType === 'text/xml') return 'xml';
if (normalizedMimeType === 'text/markdown') return 'markdown';
if (normalizedMimeType === 'image/svg+xml') return 'svg';
if (normalizedMimeType.startsWith('image/')) return 'image';
if (normalizedMimeType.startsWith('audio/')) return 'audio';
if (normalizedMimeType.startsWith('video/')) return 'video';
if (normalizedMimeType.startsWith('font/')) return 'font';
if (normalizedMimeType === 'application/pdf') return 'pdf';
if (normalizedMimeType.startsWith('text/')) return 'text';
return null;
}
hasBinaryMimePrefix(mimeType) {
return this.BINARY_MIME_PREFIXES.some(prefix => mimeType.startsWith(prefix));
}
isBinaryExtension(extension) {
return this.constants.BINARY_EXTENSIONS.has(extension?.toLowerCase());
}
isJavaScriptMimeType(mimeType) {
return this.JS_MIME_TYPES.has(this.normalizeMimeType(mimeType));
}
hasModuleFilenameHint(filename) {
if (!filename || typeof filename !== 'string') return false;
const lowerName = filename.toLowerCase();
return this.MODULE_FILENAME_SUFFIXES.some(suffix => lowerName.endsWith(suffix));
}
hasModuleMimeHint(mimeType) {
return typeof mimeType === 'string' && /(?:^|;)\s*module(?:\s*=\s*(?:1|true))?\s*(?:;|$)/i.test(mimeType);
}
isJavaScriptModule(content, filename, mimeType) {
if (this.hasModuleFilenameHint(filename) || this.hasModuleMimeHint(mimeType)) {
return true;
}
if (!content || typeof content !== 'string') {
return false;
}
const modulePatterns = [
/^\s*import\s+/m,
/^\s*export\s+/m,
/import\s*\(/,
/export\s*\{/,
/export\s+default\s+/,
/export\s+\*/
];
return modulePatterns.some(pattern => pattern.test(content));
}
detectJavaScriptType(content, filename, mimeType) {
return this.isJavaScriptModule(content, filename, mimeType) ? 'javascript-module' : 'javascript';
}
isBinaryFile(filename, mimeType) {
if (!filename) return false;
const extension = this.getExtension(filename);
if (this.isBinaryExtension(extension)) {
return true;
}
const normalizedMimeType = this.normalizeMimeType(mimeType);
if (!normalizedMimeType) return false;
if (normalizedMimeType === 'image/svg+xml' || normalizedMimeType === 'application/json' || normalizedMimeType.endsWith('+json')) {
return false;
}
return this.hasBinaryMimePrefix(normalizedMimeType);
}
isEditableType(fileType) {
return this.constants.EDITABLE_TYPES.includes(fileType);
}
isPreviewableType(fileType) {
return this.constants.PREVIEWABLE_TYPES.includes(fileType);
}
getCodeMirrorMode(fileType) {
return this.constants.CODEMIRROR_MODES[fileType] || 'text';
}
detectTypeFromContent(content, filename, mimeType = '') {
const extensionType = this.getTypeFromExtension(filename);
if (!content) {
if (extensionType === 'javascript' || extensionType === 'javascript-module') {
return this.detectJavaScriptType(content, filename, mimeType);
}
return extensionType;
}
if (/<\s*html/i.test(content)) return 'html';
if (this.isJavaScriptModule(content, filename, mimeType)) return 'javascript-module';
if (/^\s*[\.\#\@]|\s*\w+\s*\{/m.test(content)) return 'css';
if (extensionType === 'javascript' || extensionType === 'javascript-module') {
return this.detectJavaScriptType(content, filename, mimeType);
}
return extensionType;
}
detectFileType(filename, content, mimeType) {
if (!filename) return 'text';
const extensionType = this.getTypeFromExtension(filename);
const mimeTypeType = this.getTypeFromMimeType(mimeType);
if (this.isBinaryExtension(this.getExtension(filename))) {
return extensionType === 'binary' && mimeTypeType ? mimeTypeType : extensionType;
}
if (mimeTypeType && mimeTypeType !== 'javascript') {
return mimeTypeType;
}
if (mimeTypeType === 'javascript') {
return this.detectJavaScriptType(content, filename, mimeType);
}
return this.detectTypeFromContent(content, filename, mimeType);
}
}
class FileSystemUtils {
constructor(fileTypeUtils) {
this.fileTypeUtils = fileTypeUtils;
}
/**
* Resolves a relative path against a base path
* @param {string} basePath - The base file path
* @param {string} relativePath - The relative path to resolve
* @returns {string} The resolved absolute path
*/
resolvePath(basePath, relativePath) {
// Absolute paths start fresh
if (relativePath.startsWith('/')) {
return relativePath.substring(1);
}
// Get directory portion of base path
const baseDir = basePath.includes('/')
? basePath.substring(0, basePath.lastIndexOf('/'))
: '';
const baseParts = baseDir ? baseDir.split('/') : [];
const relativeParts = relativePath.split('/');
const resultParts = [...baseParts];
for (const part of relativeParts) {
if (part === '..') {
if (resultParts.length > 0) {
resultParts.pop();
}
} else if (part !== '.' && part !== '') {
resultParts.push(part);
}
}
return resultParts.join('/');
}
/**
* Finds a file in the virtual file system
* @param {Map} fileSystem - The virtual file system map
* @param {string} targetFilename - The filename to find
* @param {string} currentFilePath - The current file context for relative paths
* @returns {Object|null} The file data or null if not found
*/
findFile(fileSystem, targetFilename, currentFilePath = '') {
if (typeof targetFilename !== 'string' || !targetFilename) {
return null;
}
// Resolve relative path if we have context
if (currentFilePath) {
targetFilename = this.resolvePath(currentFilePath, targetFilename);
} else if (targetFilename.startsWith('/')) {
// Strip leading slash for root-relative paths even without context
targetFilename = targetFilename.substring(1);
}
// Try exact match first
const exactMatch = fileSystem.get(targetFilename);
if (exactMatch) {
return exactMatch;
}
// Try case-insensitive match
const targetLower = targetFilename.toLowerCase();
for (const [filename, file] of fileSystem) {
if (filename.toLowerCase() === targetLower) {
return file;
}
}
// Try matching by filename only (without directory path)
const targetBasename = targetFilename.includes('/')
? targetFilename.substring(targetFilename.lastIndexOf('/') + 1)
: targetFilename;
if (targetBasename) {
const targetBasenameLower = targetBasename.toLowerCase();
for (const [filename, file] of fileSystem) {
const fileBasename = filename.includes('/')
? filename.substring(filename.lastIndexOf('/') + 1)
: filename;
if (fileBasename.toLowerCase() === targetBasenameLower) {
return file;
}
}
}
return null;
}
/**
* Gets a data URL for a file (handles both binary and text files)
* @param {Object} fileData - The file data object
* @param {string} defaultMimeType - Default MIME type for non-binary files
* @returns {string} The data URL or content
*/
getFileDataUrl(fileData, defaultMimeType = 'text/plain') {
if (fileData.isBinary) {
return fileData.content;
}
// Handle SVG specially
if (fileData.type === 'svg') {
return `data:image/svg+xml;charset=utf-8,${encodeURIComponent(fileData.content)}`;
}
// For other text files, create a proper data URL
const mimeType = this.fileTypeUtils.getMimeTypeFromFileType(fileData.type) || defaultMimeType;
return `data:${mimeType};charset=utf-8,${encodeURIComponent(fileData.content)}`;
}
}
class PreviewScriptGenerator {
/**