From ca0b2505069ef7bac74fc57775b7a483c4a6be9a Mon Sep 17 00:00:00 2001
From: Amit Haridas <amit.wh@gmail.com>
Date: Wed, 4 Mar 2026 16:04:51 +0530
Subject: [PATCH] feat: add custom print preview dialog with configurable
 options

---
 src/index.html        |  75 +++++++++++++++++++++++
 src/main.js           |  26 ++++++++
 src/preload.js        |   1 +
 src/print-preview.js  | 139 ++++++++++++++++++++++++++++++++++++++++++
 src/renderer.js       |  39 +++++-------
 src/styles-modern.css | 101 ++++++++++++++++++++++++++++++
 6 files changed, 357 insertions(+), 24 deletions(-)
 create mode 100644 src/print-preview.js

diff --git a/src/index.html b/src/index.html
index 98fa29d..7912757 100644
--- a/src/index.html
+++ b/src/index.html
@@ -331,6 +331,81 @@
             </div>
         </div>
 
+        <!-- Print Preview Dialog -->
+        <div class="export-dialog hidden" id="print-preview-overlay">
+            <div class="export-dialog-content print-preview-dialog">
+                <div class="export-dialog-header">
+                    <h3>Print Preview</h3>
+                    <button id="print-preview-close" title="Close" style="background:none;border:none;color:white;font-size:24px;cursor:pointer;">&times;</button>
+                </div>
+                <div class="print-preview-body">
+                    <div class="print-preview-sidebar">
+                        <div class="print-option-group">
+                            <label>Paper Size</label>
+                            <select id="print-paper-size">
+                                <option value="A3">A3</option>
+                                <option value="A4" selected>A4</option>
+                                <option value="A5">A5</option>
+                                <option value="Letter">Letter</option>
+                                <option value="Legal">Legal</option>
+                                <option value="Tabloid">Tabloid</option>
+                            </select>
+                        </div>
+                        <div class="print-option-group">
+                            <label>Orientation</label>
+                            <select id="print-orientation">
+                                <option value="portrait" selected>Portrait</option>
+                                <option value="landscape">Landscape</option>
+                            </select>
+                        </div>
+                        <div class="print-option-group">
+                            <label>Margins</label>
+                            <select id="print-margins">
+                                <option value="default" selected>Default</option>
+                                <option value="narrow">Narrow</option>
+                                <option value="wide">Wide</option>
+                                <option value="none">None</option>
+                            </select>
+                        </div>
+                        <div class="print-option-group">
+                            <label>Scale</label>
+                            <div class="scale-control">
+                                <input type="range" id="print-scale" min="50" max="200" value="100">
+                                <span id="print-scale-value">100%</span>
+                            </div>
+                        </div>
+                        <div class="print-option-group">
+                            <label class="checkbox-label">
+                                <input type="checkbox" id="print-headers" checked>
+                                Headers &amp; Footers
+                            </label>
+                        </div>
+                        <div class="print-option-group">
+                            <label class="checkbox-label">
+                                <input type="checkbox" id="print-background" checked>
+                                Background Colors
+                            </label>
+                        </div>
+                        <div class="print-option-group">
+                            <label>Pages</label>
+                            <select id="print-pages">
+                                <option value="all" selected>All</option>
+                                <option value="custom">Custom Range</option>
+                            </select>
+                            <input type="text" id="print-page-range" placeholder="e.g., 1-3, 5" class="hidden print-range-input">
+                        </div>
+                        <div class="print-actions">
+                            <button class="btn-primary" id="print-execute">Print</button>
+                            <button class="btn-secondary" id="print-cancel">Cancel</button>
+                        </div>
+                    </div>
+                    <div class="print-preview-content">
+                        <iframe id="print-preview-frame" style="width:100%;height:100%;border:none;background:white;"></iframe>
+                    </div>
+                </div>
+            </div>
+        </div>
+
         <!-- Command Palette -->
         <div class="command-palette-overlay hidden" id="command-palette-overlay">
             <div class="command-palette">
diff --git a/src/main.js b/src/main.js
index bfc32b0..4a7757a 100644
--- a/src/main.js
+++ b/src/main.js
@@ -2472,6 +2472,32 @@ ipcMain.on('do-print', (event, { withStyles }) => {
   }
 });
 
+// Handle printing with custom options from print preview dialog
+ipcMain.on('do-print-with-options', (event, options) => {
+  if (!mainWindow) return;
+
+  const marginsMap = {
+    'default': { marginType: 'default' },
+    'narrow': { top: 0.4, bottom: 0.4, left: 0.4, right: 0.4 },
+    'wide': { top: 1.0, bottom: 1.0, left: 1.0, right: 1.0 },
+    'none': { top: 0, bottom: 0, left: 0, right: 0 },
+  };
+
+  const printOptions = {
+    silent: false,
+    printBackground: options.background,
+    landscape: options.orientation === 'landscape',
+    scaleFactor: options.scale / 100,
+    pageSize: options.paperSize,
+  };
+
+  if (options.margins && options.margins !== 'default') {
+    printOptions.margins = marginsMap[options.margins];
+  }
+
+  mainWindow.webContents.print(printOptions);
+});
+
 // Handle renderer ready for file association
 ipcMain.on('renderer-ready', (event) => {
   console.log('[MAIN] renderer-ready received, rendererReady was:', rendererReady);
diff --git a/src/preload.js b/src/preload.js
index bd04aa4..1813ada 100644
--- a/src/preload.js
+++ b/src/preload.js
@@ -29,6 +29,7 @@ const ALLOWED_SEND_CHANNELS = [
 
   // Print
   'do-print',
+  'do-print-with-options',
 
   // Export
   'export-with-options',
diff --git a/src/print-preview.js b/src/print-preview.js
new file mode 100644
index 0000000..8f7b89e
--- /dev/null
+++ b/src/print-preview.js
@@ -0,0 +1,139 @@
+class PrintPreview {
+    constructor() {
+        this.overlay = document.getElementById('print-preview-overlay');
+        this._lastContent = '';
+        this.setupEventListeners();
+    }
+
+    open(htmlContent) {
+        this._lastContent = htmlContent;
+        this.overlay.classList.remove('hidden');
+        this.updatePreview(htmlContent);
+        this.updateScaleLabel();
+    }
+
+    close() {
+        this.overlay.classList.add('hidden');
+    }
+
+    setupEventListeners() {
+        document.getElementById('print-preview-close')?.addEventListener('click', () => this.close());
+        document.getElementById('print-cancel')?.addEventListener('click', () => this.close());
+        document.getElementById('print-execute')?.addEventListener('click', () => this.executePrint());
+
+        // Update preview on option changes
+        ['print-paper-size', 'print-orientation', 'print-margins'].forEach(id => {
+            document.getElementById(id)?.addEventListener('change', () => this.refreshPreview());
+        });
+
+        // Scale slider
+        const scaleSlider = document.getElementById('print-scale');
+        scaleSlider?.addEventListener('input', () => this.updateScaleLabel());
+
+        // Page range toggle
+        document.getElementById('print-pages')?.addEventListener('change', (e) => {
+            const rangeInput = document.getElementById('print-page-range');
+            if (rangeInput) {
+                rangeInput.classList.toggle('hidden', e.target.value !== 'custom');
+            }
+        });
+
+        // Close on overlay click
+        this.overlay?.addEventListener('click', (e) => {
+            if (e.target === this.overlay) this.close();
+        });
+
+        // Close on Escape
+        document.addEventListener('keydown', (e) => {
+            if (e.key === 'Escape' && !this.overlay.classList.contains('hidden')) {
+                this.close();
+            }
+        });
+    }
+
+    updateScaleLabel() {
+        const scale = document.getElementById('print-scale')?.value || 100;
+        const label = document.getElementById('print-scale-value');
+        if (label) label.textContent = `${scale}%`;
+    }
+
+    updatePreview(htmlContent) {
+        const frame = document.getElementById('print-preview-frame');
+        if (!frame) return;
+
+        this._lastContent = htmlContent;
+
+        const orientation = document.getElementById('print-orientation')?.value || 'portrait';
+        const paperSize = document.getElementById('print-paper-size')?.value || 'A4';
+
+        // Get dimensions for paper size
+        const sizes = {
+            'A3': { width: '297mm', height: '420mm' },
+            'A4': { width: '210mm', height: '297mm' },
+            'A5': { width: '148mm', height: '210mm' },
+            'Letter': { width: '8.5in', height: '11in' },
+            'Legal': { width: '8.5in', height: '14in' },
+            'Tabloid': { width: '11in', height: '17in' },
+        };
+
+        const size = sizes[paperSize] || sizes['A4'];
+        const width = orientation === 'landscape' ? size.height : size.width;
+        const height = orientation === 'landscape' ? size.width : size.height;
+
+        const previewHtml = `
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <style>
+                    body {
+                        margin: 20px;
+                        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+                        font-size: 14px;
+                        line-height: 1.6;
+                    }
+                    @page { size: ${width} ${height}; }
+                    pre { background: #f5f5f5; padding: 12px; border-radius: 6px; overflow-x: auto; }
+                    code { background: #f0f0f0; padding: 2px 6px; border-radius: 3px; font-size: 13px; }
+                    pre code { background: none; padding: 0; }
+                    table { border-collapse: collapse; width: 100%; }
+                    th, td { border: 1px solid #ddd; padding: 8px; }
+                    blockquote { border-left: 4px solid #ddd; margin-left: 0; padding-left: 16px; color: #666; }
+                    img { max-width: 100%; }
+                    h1, h2, h3 { margin-top: 1.5em; }
+                </style>
+            </head>
+            <body>${htmlContent || ''}</body>
+            </html>
+        `;
+
+        frame.srcdoc = previewHtml;
+    }
+
+    refreshPreview() {
+        if (this._lastContent) {
+            this.updatePreview(this._lastContent);
+        }
+    }
+
+    getOptions() {
+        return {
+            paperSize: document.getElementById('print-paper-size')?.value || 'A4',
+            orientation: document.getElementById('print-orientation')?.value || 'portrait',
+            margins: document.getElementById('print-margins')?.value || 'default',
+            scale: parseInt(document.getElementById('print-scale')?.value || '100'),
+            headers: document.getElementById('print-headers')?.checked ?? true,
+            background: document.getElementById('print-background')?.checked ?? true,
+            pages: document.getElementById('print-pages')?.value || 'all',
+            pageRange: document.getElementById('print-page-range')?.value || '',
+        };
+    }
+
+    executePrint() {
+        const options = this.getOptions();
+        const { ipcRenderer } = require('electron');
+        ipcRenderer.send('do-print-with-options', options);
+        this.close();
+    }
+}
+
+module.exports = { PrintPreview };
diff --git a/src/renderer.js b/src/renderer.js
index d8aabee..7dd1caf 100644
--- a/src/renderer.js
+++ b/src/renderer.js
@@ -12,6 +12,7 @@ const { createEditor } = require('./editor/codemirror-setup');
 const { undo, redo } = require('@codemirror/commands');
 const { SidebarManager } = require('./sidebar/sidebar-manager');
 const { CommandPalette } = require('./command-palette');
+const { PrintPreview } = require('./print-preview');
 
 // Configure marked with highlight extension
 marked.use(markedHighlight({
@@ -1051,6 +1052,9 @@ document.addEventListener('DOMContentLoaded', () => {
     // Initialize command palette
     const commandPalette = new CommandPalette();
 
+    // Initialize print preview
+    const printPreview = new PrintPreview();
+
     // Register commands
     commandPalette.register('New File', 'Ctrl+N', () => tabManager.createNewTab());
     commandPalette.register('Open File', 'Ctrl+O', () => ipcRenderer.send('menu-open'));
@@ -1087,6 +1091,11 @@ document.addEventListener('DOMContentLoaded', () => {
     commandPalette.register('Toggle Sidebar: Git', 'Ctrl+Shift+G', () => sidebarManager.togglePanel('git'));
     commandPalette.register('Toggle Sidebar: Snippets', '', () => sidebarManager.togglePanel('snippets'));
     commandPalette.register('Toggle Sidebar: Templates', '', () => sidebarManager.togglePanel('templates'));
+    commandPalette.register('Print Preview', 'Ctrl+P', () => {
+        const tab = tabManager.tabs.get(tabManager.activeTabId);
+        const preview = document.getElementById(`preview-${tab.id}`);
+        printPreview.open(preview?.innerHTML || '');
+    });
     commandPalette.register('Export to PDF', '', () => ipcRenderer.send('export', 'pdf'));
     commandPalette.register('Export to DOCX', '', () => ipcRenderer.send('export', 'docx'));
     commandPalette.register('Export to HTML', '', () => ipcRenderer.send('export', 'html'));
@@ -1261,18 +1270,18 @@ ipcRenderer.on('adjust-font-size', (event, action) => {
     updateFontSizes(currentFontSize);
 });
 
-// Print preview request handlers - handle printing directly
+// Print preview request handlers - open print preview dialog
 ipcRenderer.on('print-preview', () => {
     console.log('[RENDERER] print-preview received');
-    handlePrintPreview(false);
+    openPrintPreviewDialog();
 });
 
 ipcRenderer.on('print-preview-styled', () => {
     console.log('[RENDERER] print-preview-styled received');
-    handlePrintPreview(true);
+    openPrintPreviewDialog();
 });
 
-function handlePrintPreview(withStyles) {
+function openPrintPreviewDialog() {
     const activeTabId = tabManager ? tabManager.activeTabId : 1;
     const previewContent = document.getElementById(`preview-${activeTabId}`);
 
@@ -1281,26 +1290,8 @@ function handlePrintPreview(withStyles) {
         return;
     }
 
-    console.log('[RENDERER] Starting print with withStyles:', withStyles);
-    console.log('[RENDERER] Preview content length:', previewContent.innerHTML.length);
-
-    // Add body classes for print mode - let CSS handle everything
-    document.body.classList.add('printing');
-    if (!withStyles) {
-        document.body.classList.add('printing-no-styles');
-    }
-
-    // Wait for CSS to apply then print
-    setTimeout(() => {
-        console.log('[RENDERER] Sending do-print to main process');
-        ipcRenderer.send('do-print', { withStyles });
-
-        // Restore classes after print dialog opens
-        setTimeout(() => {
-            document.body.classList.remove('printing', 'printing-no-styles');
-            console.log('[RENDERER] Print classes removed');
-        }, 1000);
-    }, 100);
+    const printPreviewInstance = new PrintPreview();
+    printPreviewInstance.open(previewContent.innerHTML);
 }
 
 // Export Dialog functionality
diff --git a/src/styles-modern.css b/src/styles-modern.css
index 75e02ae..f38a7ef 100644
--- a/src/styles-modern.css
+++ b/src/styles-modern.css
@@ -2232,3 +2232,104 @@ body[class*="dark"] .breadcrumb-bar {
     color: #888;
     border-color: #333;
 }
+
+/* Print Preview Dialog */
+.print-preview-dialog {
+    width: 90vw;
+    max-width: 1200px;
+    height: 80vh;
+    display: flex;
+    flex-direction: column;
+}
+.print-preview-body {
+    display: flex;
+    flex: 1;
+    overflow: hidden;
+}
+.print-preview-sidebar {
+    width: 260px;
+    padding: 16px;
+    border-right: 1px solid var(--gray-200, #e5e7eb);
+    overflow-y: auto;
+    flex-shrink: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+}
+.print-preview-content {
+    flex: 1;
+    padding: 16px;
+    background: #e5e7eb;
+    display: flex;
+    justify-content: center;
+    overflow: auto;
+}
+.print-preview-content iframe {
+    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
+    border-radius: 4px;
+}
+.print-option-group {
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+}
+.print-option-group label {
+    font-size: 13px;
+    font-weight: 500;
+    color: var(--gray-600, #4b5563);
+}
+.print-option-group select,
+.print-option-group input[type="text"] {
+    padding: 8px 10px;
+    border: 1px solid var(--gray-300, #d1d5db);
+    border-radius: 8px;
+    font-size: 13px;
+    background: white;
+}
+.scale-control {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+.scale-control input[type="range"] {
+    flex: 1;
+}
+.checkbox-label {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    cursor: pointer;
+}
+.print-range-input {
+    margin-top: 6px;
+}
+.print-actions {
+    display: flex;
+    gap: 8px;
+    margin-top: auto;
+    padding-top: 16px;
+}
+.btn-primary {
+    flex: 1;
+    padding: 10px;
+    background: var(--primary-dark, #5661b3);
+    color: white;
+    border: none;
+    border-radius: 8px;
+    font-size: 14px;
+    font-weight: 500;
+    cursor: pointer;
+}
+.btn-primary:hover {
+    opacity: 0.9;
+}
+.btn-secondary {
+    flex: 1;
+    padding: 10px;
+    background: var(--gray-100, #f3f4f6);
+    color: var(--gray-700, #374151);
+    border: 1px solid var(--gray-300, #d1d5db);
+    border-radius: 8px;
+    font-size: 14px;
+    cursor: pointer;
+}