Version 1.6.0 - Enhanced Markdown Editor & ConvertAPI Integration

New Features:
Enhanced Markdown Toolbar
- Added strikethrough button
- Added code block button
- Added horizontal rule button
Fixed Find & Replace
- Fixed focus issue
- Visual highlighting with text selection
- Smart scroll to matches
Fixed Line Numbers
- Corrected line counting
- Added scroll synchronization
ConvertAPI Integration
- Cloud conversion support (200+ formats)
- Secure API key storage
- Real-time conversion status

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pan-converter",
-  "version": "1.5.7",
+  "version": "1.6.0",
   "description": "Cross-platform Markdown editor and converter using Pandoc",
   "main": "src/main.js",
   "scripts": {
@@ -31,6 +31,7 @@
   },
   "dependencies": {
     "codemirror": "^6.0.2",
+    "convertapi": "^1.15.0",
     "dompurify": "^3.2.6",
     "electron-store": "^10.1.0",
     "highlight.js": "^11.11.1",
@@ -75,15 +76,21 @@
       "target": [
         {
           "target": "nsis",
-          "arch": ["x64"]
+          "arch": [
+            "x64"
+          ]
         },
         {
           "target": "portable",
-          "arch": ["x64"]
+          "arch": [
+            "x64"
+          ]
         },
         {
           "target": "zip",
-          "arch": ["x64"]
+          "arch": [
+            "x64"
+          ]
         }
       ],
       "artifactName": "${productName}-${version}-${arch}.${ext}",

src/index.html

@@ -75,6 +75,27 @@
                     <line x1="15" y1="3" x2="15" y2="21"></line>
                 </svg>
             </button>
+            <button id="btn-strikethrough" title="Strikethrough">
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M16 4H9a3 3 0 0 0-2.83 4"></path>
+                    <path d="M14 12a4 4 0 0 1 0 8H6"></path>
+                    <line x1="4" y1="12" x2="20" y2="12"></line>
+                </svg>
+            </button>
+            <button id="btn-code-block" title="Code Block">
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <rect x="2" y="6" width="20" height="12" rx="2"></rect>
+                    <path d="m10 10-2 2 2 2"></path>
+                    <path d="m14 10 2 2-2 2"></path>
+                </svg>
+            </button>
+            <button id="btn-horizontal-rule" title="Horizontal Rule">
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <line x1="3" y1="12" x2="21" y2="12"></line>
+                    <line x1="3" y1="6" x2="21" y2="6"></line>
+                    <line x1="3" y1="18" x2="21" y2="18"></line>
+                </svg>
+            </button>
             <div class="toolbar-separator"></div>
             <button id="btn-find" title="Find & Replace (Ctrl+F)">
                 <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
@@ -233,6 +254,58 @@
             </div>
         </div>
 
+        <!-- ConvertAPI Dialog -->
+        <div id="convertapi-dialog" class="export-dialog hidden">
+            <div class="export-dialog-content">
+                <div class="export-dialog-header">
+                    <h3>ConvertAPI Conversion</h3>
+                    <button id="convertapi-dialog-close" title="Close">×</button>
+                </div>
+                <div class="export-dialog-body">
+                    <div class="export-section">
+                        <label for="convertapi-key">API Key:</label>
+                        <input type="text" id="convertapi-key" placeholder="Enter your ConvertAPI key">
+                        <small>Get your free API key at <a href="https://www.convertapi.com" target="_blank">convertapi.com</a></small>
+                    </div>
+
+                    <div class="export-section">
+                        <label for="convertapi-from">Convert From:</label>
+                        <select id="convertapi-from">
+                            <option value="md">Markdown (MD)</option>
+                            <option value="docx">Word (DOCX)</option>
+                            <option value="pdf">PDF</option>
+                            <option value="html">HTML</option>
+                            <option value="txt">Text</option>
+                        </select>
+                    </div>
+
+                    <div class="export-section">
+                        <label for="convertapi-to">Convert To:</label>
+                        <select id="convertapi-to">
+                            <option value="pdf">PDF</option>
+                            <option value="docx">Word (DOCX)</option>
+                            <option value="html">HTML</option>
+                            <option value="txt">Text</option>
+                            <option value="jpg">JPG Image</option>
+                            <option value="png">PNG Image</option>
+                            <option value="epub">EPUB</option>
+                            <option value="odt">ODT</option>
+                        </select>
+                    </div>
+
+                    <div id="convertapi-progress" class="batch-progress hidden">
+                        <div class="progress-text">
+                            <span id="convertapi-status">Converting...</span>
+                        </div>
+                    </div>
+                </div>
+                <div class="export-dialog-footer">
+                    <button id="convertapi-cancel">Cancel</button>
+                    <button id="convertapi-convert" class="primary">Convert</button>
+                </div>
+            </div>
+        </div>
+
         <!-- Batch Conversion Dialog -->
         <div id="batch-dialog" class="batch-dialog hidden">
             <div class="batch-dialog-content">

src/main.js

@@ -267,6 +267,30 @@ function createMenu() {
         }
       ]
     },
+    {
+      label: 'ConvertAPI',
+      submenu: [
+        {
+          label: 'Cloud Conversion...',
+          click: () => showConvertAPIDialog()
+        },
+        {
+          type: 'separator'
+        },
+        {
+          label: 'About ConvertAPI',
+          click: () => {
+            dialog.showMessageBox(mainWindow, {
+              type: 'info',
+              title: 'About ConvertAPI',
+              message: 'ConvertAPI Integration',
+              detail: 'ConvertAPI provides cloud-based file conversion with support for 200+ formats.\n\nFeatures:\n• Convert between 200+ file formats\n• High-quality conversions\n• Fast processing\n• Secure cloud storage\n\nGet your free API key at:\nhttps://www.convertapi.com\n\nFree tier includes 250 conversions/month.',
+              buttons: ['OK']
+            });
+          }
+        }
+      ]
+    },
     {
       label: 'Help',
       submenu: [
@@ -277,7 +301,7 @@ function createMenu() {
               type: 'info',
               title: 'About PanConverter',
               message: 'PanConverter',
-              detail: 'A cross-platform Markdown editor and converter using Pandoc.\n\nVersion: 1.5.7\nAuthor: Amit Haridas\nEmail: amit.wh@gmail.com\nLicense: MIT\n\nFeatures:\n• Windows Explorer context menu integration\n• Tabbed interface for multiple files\n• Advanced markdown editing with live preview\n• Real-time preview updates while typing\n• Full toolbar markdown editing functions\n• Enhanced PDF export with built-in Electron fallback\n• File association support for .md files\n• Command-line interface for batch conversion\n• Advanced export options with templates and metadata\n• Batch file conversion with progress tracking\n• Improved preview typography and spacing\n• Adjustable font sizes via menu (Ctrl+Shift+Plus/Minus)\n• Complete theme support including Monokai fixes\n• Find & replace with match highlighting\n• Line numbers and auto-indentation\n• Export to multiple formats via Pandoc\n• PowerPoint & presentation export\n• Export tables to Excel/ODS spreadsheets\n• Document import & conversion\n• Table creation helper\n• Multiple themes support\n• Undo/redo functionality\n• Live word count and statistics',
+              detail: 'A cross-platform Markdown editor and converter using Pandoc.\n\nVersion: 1.6.0\nAuthor: Amit Haridas\nEmail: amit.wh@gmail.com\nLicense: MIT\n\nFeatures:\n• Windows Explorer context menu integration\n• Tabbed interface for multiple files\n• Advanced markdown editing with live preview\n• Real-time preview updates while typing\n• Full toolbar markdown editing functions\n• Enhanced PDF export with built-in Electron fallback\n• File association support for .md files\n• Command-line interface for batch conversion\n• Advanced export options with templates and metadata\n• Batch file conversion with progress tracking\n• Improved preview typography and spacing\n• Adjustable font sizes via menu (Ctrl+Shift+Plus/Minus)\n• Complete theme support including Monokai fixes\n• Find & replace with match highlighting\n• Line numbers and auto-indentation\n• Export to multiple formats via Pandoc\n• PowerPoint & presentation export\n• Export tables to Excel/ODS spreadsheets\n• Document import & conversion\n• Table creation helper\n• Multiple themes support\n• Undo/redo functionality\n• Live word count and statistics',
               buttons: ['OK']
             });
           }
@@ -343,6 +367,54 @@ function showBatchConversionDialog() {
   mainWindow.webContents.send('show-batch-dialog');
 }
 
+// ConvertAPI integration
+function showConvertAPIDialog() {
+  mainWindow.webContents.send('show-convertapi-dialog');
+}
+
+// Handle ConvertAPI conversion
+ipcMain.on('convertapi-convert', async (event, { apiKey, fromFormat, toFormat, filePath }) => {
+  try {
+    const ConvertAPI = require('convertapi')(apiKey);
+
+    mainWindow.webContents.send('convertapi-status', 'Converting file...');
+
+    const result = await ConvertAPI.convert(toFormat, {
+      File: filePath
+    }, fromFormat);
+
+    // Save the converted file
+    const outputPath = filePath.replace(/\.[^/.]+$/, `.${toFormat}`);
+    await result.saveFiles(path.dirname(outputPath));
+
+    mainWindow.webContents.send('convertapi-complete', {
+      success: true,
+      outputPath: result.files[0].path
+    });
+
+    dialog.showMessageBox(mainWindow, {
+      type: 'info',
+      title: 'Conversion Complete',
+      message: 'File converted successfully!',
+      detail: `Saved to: ${result.files[0].path}`,
+      buttons: ['OK']
+    });
+  } catch (error) {
+    mainWindow.webContents.send('convertapi-complete', {
+      success: false,
+      error: error.message
+    });
+
+    dialog.showMessageBox(mainWindow, {
+      type: 'error',
+      title: 'Conversion Failed',
+      message: 'ConvertAPI conversion failed',
+      detail: error.message,
+      buttons: ['OK']
+    });
+  }
+});
+
 function performExportWithOptions(format, options) {
   const outputFile = dialog.showSaveDialogSync(mainWindow, {
     defaultPath: currentFile.replace(/\.[^/.]+$/, `.${format}`),

src/renderer.js

@@ -146,6 +146,16 @@ class TabManager {
             editor.addEventListener('input', () => {
                 this.handleEditorInput(tab.id);
             });
+
+            // Add scroll listener for line number sync
+            editor.addEventListener('scroll', () => {
+                if (this.showLineNumbers && this.activeTabId === tab.id) {
+                    const lineNumbers = document.getElementById(`line-numbers-${tab.id}`);
+                    if (lineNumbers) {
+                        lineNumbers.scrollTop = editor.scrollTop;
+                    }
+                }
+            });
         }
     }
     
@@ -341,11 +351,14 @@ class TabManager {
         if (!editor || !lineNumbers) return;
 
         if (this.showLineNumbers) {
-            const lines = editor.value.split('\\n');
+            const lines = editor.value.split('\n');
             lineNumbers.innerHTML = lines.map((_, i) =>
                 `<div class="line-number">${i + 1}</div>`
             ).join('');
             lineNumbers.classList.remove('hidden');
+
+            // Sync scroll position
+            lineNumbers.scrollTop = editor.scrollTop;
         } else {
             lineNumbers.classList.add('hidden');
         }
@@ -580,6 +593,21 @@ class TabManager {
             this.insertTable();
         });
 
+        // Strikethrough
+        document.getElementById('btn-strikethrough').addEventListener('click', () => {
+            this.wrapSelection('~~', '~~');
+        });
+
+        // Code Block
+        document.getElementById('btn-code-block').addEventListener('click', () => {
+            this.insertCodeBlock();
+        });
+
+        // Horizontal Rule
+        document.getElementById('btn-horizontal-rule').addEventListener('click', () => {
+            this.insertHorizontalRule();
+        });
+
         // Preview toggle
         document.getElementById('btn-preview-toggle').addEventListener('click', () => {
             this.isPreviewVisible = !this.isPreviewVisible;
@@ -657,16 +685,266 @@ class TabManager {
         this.handleEditorInput(this.activeTabId);
     }
 
+    // Insert a code block
+    insertCodeBlock() {
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+        if (!editor) return;
+
+        const selectedText = editor.value.substring(editor.selectionStart, editor.selectionEnd);
+        const codeBlock = '\n```\n' + (selectedText || 'code here') + '\n```\n';
+
+        const start = editor.selectionStart;
+        editor.value = editor.value.substring(0, start) + codeBlock + editor.value.substring(editor.selectionEnd);
+
+        // Update cursor position
+        editor.selectionStart = editor.selectionEnd = start + codeBlock.length;
+        editor.focus();
+
+        // Trigger update
+        this.handleEditorInput(this.activeTabId);
+    }
+
+    // Insert a horizontal rule
+    insertHorizontalRule() {
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+        if (!editor) return;
+
+        const hr = '\n\n---\n\n';
+        const start = editor.selectionStart;
+
+        editor.value = editor.value.substring(0, start) + hr + editor.value.substring(start);
+
+        // Update cursor position
+        editor.selectionStart = editor.selectionEnd = start + hr.length;
+        editor.focus();
+
+        // Trigger update
+        this.handleEditorInput(this.activeTabId);
+    }
+    
     setupFindEvents() {
-        // Find dialog implementation...
-        document.getElementById('btn-find').addEventListener('click', () => {
+        const btnFind = document.getElementById('btn-find');
+        const btnFindClose = document.getElementById('btn-find-close');
+        const findInput = document.getElementById('find-input');
+        const btnFindNext = document.getElementById('btn-find-next');
+        const btnFindPrev = document.getElementById('btn-find-prev');
+        const btnReplace = document.getElementById('btn-replace');
+        const btnReplaceAll = document.getElementById('btn-replace-all');
+
+        if (!btnFind || !btnFindClose || !findInput || !btnFindNext || !btnFindPrev || !btnReplace || !btnReplaceAll) {
+            console.error('Find dialog elements not found');
+            return;
+        }
+
+        // Show find dialog
+        btnFind.addEventListener('click', () => {
             document.getElementById('find-dialog').classList.remove('hidden');
-            document.getElementById('find-input').focus();
+            findInput.focus();
         });
 
-        document.getElementById('btn-find-close').addEventListener('click', () => {
+        // Close find dialog
+        btnFindClose.addEventListener('click', () => {
             document.getElementById('find-dialog').classList.add('hidden');
+            this.clearFindHighlights();
         });
+
+        // Find input change - update matches
+        findInput.addEventListener('input', () => {
+            this.performFind();
+        });
+
+        // Find next
+        btnFindNext.addEventListener('click', () => {
+            this.findNext();
+        });
+
+        // Find previous
+        btnFindPrev.addEventListener('click', () => {
+            this.findPrevious();
+        });
+
+        // Replace
+        btnReplace.addEventListener('click', () => {
+            this.replaceOne();
+        });
+
+        // Replace all
+        btnReplaceAll.addEventListener('click', () => {
+            this.replaceAll();
+        });
+
+        // Enter key in find input - find next
+        findInput.addEventListener('keydown', (e) => {
+            if (e.key === 'Enter') {
+                e.preventDefault();
+                if (e.shiftKey) {
+                    this.findPrevious();
+                } else {
+                    this.findNext();
+                }
+            }
+        });
+
+    }
+
+    performFind() {
+        const findText = document.getElementById('find-input').value;
+        const tab = this.tabs.get(this.activeTabId);
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+
+        if (!findText || !tab || !editor) {
+            this.clearFindHighlights();
+            const findCount = document.getElementById('find-count');
+            if (findCount) {
+                findCount.textContent = '0 matches';
+            }
+            return;
+        }
+
+        const content = editor.value;
+        const matches = [];
+        let index = 0;
+
+        // Find all matches
+        while ((index = content.indexOf(findText, index)) !== -1) {
+            matches.push(index);
+            index += findText.length;
+        }
+
+        tab.findMatches = matches;
+        tab.currentMatchIndex = matches.length > 0 ? 0 : -1;
+
+        // Update match count
+        const findCount = document.getElementById('find-count');
+        if (findCount) {
+            findCount.textContent = `${matches.length} match${matches.length !== 1 ? 'es' : ''}`;
+        }
+
+        // Highlight first match
+        if (matches.length > 0) {
+            this.highlightMatch(0);
+        }
+    }
+
+    findNext() {
+        const tab = this.tabs.get(this.activeTabId);
+        if (!tab || tab.findMatches.length === 0) return;
+
+        tab.currentMatchIndex = (tab.currentMatchIndex + 1) % tab.findMatches.length;
+        this.highlightMatch(tab.currentMatchIndex);
+    }
+
+    findPrevious() {
+        const tab = this.tabs.get(this.activeTabId);
+        if (!tab || tab.findMatches.length === 0) return;
+
+        tab.currentMatchIndex = tab.currentMatchIndex - 1;
+        if (tab.currentMatchIndex < 0) {
+            tab.currentMatchIndex = tab.findMatches.length - 1;
+        }
+        this.highlightMatch(tab.currentMatchIndex);
+    }
+
+    highlightMatch(matchIndex) {
+        const tab = this.tabs.get(this.activeTabId);
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+        const findText = document.getElementById('find-input').value;
+
+        if (!tab || !editor || matchIndex < 0 || matchIndex >= tab.findMatches.length) return;
+
+        const position = tab.findMatches[matchIndex];
+
+        // Select the match WITHOUT focusing (to keep focus on find input)
+        editor.setSelectionRange(position, position + findText.length);
+
+        // Make the selection visible by briefly focusing and then restoring focus
+        const findInput = document.getElementById('find-input');
+        const hadFocus = document.activeElement === findInput;
+
+        // Temporarily focus editor to make selection visible
+        editor.focus();
+
+        // Restore focus to find input if it had focus
+        if (hadFocus) {
+            setTimeout(() => {
+                findInput.focus();
+                // Restore cursor position in find input
+                findInput.setSelectionRange(findInput.value.length, findInput.value.length);
+            }, 10);
+        }
+
+        // Scroll into view
+        const lineHeight = 20; // Approximate line height
+        const charPosition = position;
+        const numLines = editor.value.substring(0, charPosition).split('\n').length;
+        const scrollPosition = (numLines - 5) * lineHeight; // Show match 5 lines from top
+
+        editor.scrollTop = Math.max(0, scrollPosition);
+
+        // Update match counter
+        const findCount = document.getElementById('find-count');
+        if (findCount) {
+            findCount.textContent = `Match ${matchIndex + 1} of ${tab.findMatches.length}`;
+        }
+    }
+
+    replaceOne() {
+        const tab = this.tabs.get(this.activeTabId);
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+        const findText = document.getElementById('find-input').value;
+        const replaceText = document.getElementById('replace-input').value;
+
+        if (!tab || !editor || tab.findMatches.length === 0 || tab.currentMatchIndex < 0) return;
+
+        const position = tab.findMatches[tab.currentMatchIndex];
+        const before = editor.value.substring(0, position);
+        const after = editor.value.substring(position + findText.length);
+
+        editor.value = before + replaceText + after;
+        tab.content = editor.value;
+        tab.isDirty = true;
+
+        this.updatePreview(this.activeTabId);
+        this.updateWordCount();
+        this.updateTabBar();
+
+        // Re-perform find to update matches
+        this.performFind();
+    }
+
+    replaceAll() {
+        const tab = this.tabs.get(this.activeTabId);
+        const editor = document.getElementById(`editor-${this.activeTabId}`);
+        const findText = document.getElementById('find-input').value;
+        const replaceText = document.getElementById('replace-input').value;
+
+        if (!tab || !editor || !findText) return;
+
+        // Simple replace all
+        const newContent = editor.value.split(findText).join(replaceText);
+        const replacedCount = tab.findMatches.length;
+
+        editor.value = newContent;
+        tab.content = newContent;
+        tab.isDirty = true;
+
+        this.updatePreview(this.activeTabId);
+        this.updateWordCount();
+        this.updateTabBar();
+
+        // Update match count
+        document.getElementById('find-count').textContent = `Replaced ${replacedCount} match${replacedCount !== 1 ? 'es' : ''}`;
+
+        // Re-perform find
+        this.performFind();
+    }
+
+    clearFindHighlights() {
+        const tab = this.tabs.get(this.activeTabId);
+        if (tab) {
+            tab.findMatches = [];
+            tab.currentMatchIndex = -1;
+        }
     }
     
     // File operations
@@ -723,6 +1001,16 @@ document.addEventListener('DOMContentLoaded', () => {
         initialEditor.addEventListener('input', () => {
             tabManager.handleEditorInput(1);
         });
+
+        // Add scroll listener for line number sync
+        initialEditor.addEventListener('scroll', () => {
+            if (tabManager.showLineNumbers && tabManager.activeTabId === 1) {
+                const lineNumbers = document.getElementById('line-numbers-1');
+                if (lineNumbers) {
+                    lineNumbers.scrollTop = initialEditor.scrollTop;
+                }
+            }
+        });
     }
 
     // Request current theme
@@ -1081,6 +1369,22 @@ ipcRenderer.on('show-batch-dialog', () => {
     showBatchDialog();
 });
 
+// ConvertAPI dialog handlers
+ipcRenderer.on('show-convertapi-dialog', () => {
+    showConvertAPIDialog();
+});
+
+ipcRenderer.on('convertapi-status', (event, status) => {
+    document.getElementById('convertapi-status').textContent = status;
+});
+
+ipcRenderer.on('convertapi-complete', (event, result) => {
+    document.getElementById('convertapi-progress').classList.add('hidden');
+    if (result.success) {
+        document.getElementById('convertapi-dialog').classList.add('hidden');
+    }
+});
+
 ipcRenderer.on('batch-progress', (event, progress) => {
     updateBatchProgress(progress);
 });
@@ -1233,6 +1537,71 @@ if (originalExportConfirm) {
     });
 }
 
+// ConvertAPI Dialog Functions
+function showConvertAPIDialog() {
+    const dialog = document.getElementById('convertapi-dialog');
+    dialog.classList.remove('hidden');
+
+    // Load saved API key if exists
+    const savedKey = localStorage.getItem('convertapi-key');
+    if (savedKey) {
+        document.getElementById('convertapi-key').value = savedKey;
+    }
+}
+
+document.addEventListener('DOMContentLoaded', () => {
+    // ConvertAPI dialog close
+    const convertAPIDialogClose = document.getElementById('convertapi-dialog-close');
+    if (convertAPIDialogClose) {
+        convertAPIDialogClose.addEventListener('click', () => {
+            document.getElementById('convertapi-dialog').classList.add('hidden');
+        });
+    }
+
+    // ConvertAPI cancel
+    const convertAPICancel = document.getElementById('convertapi-cancel');
+    if (convertAPICancel) {
+        convertAPICancel.addEventListener('click', () => {
+            document.getElementById('convertapi-dialog').classList.add('hidden');
+        });
+    }
+
+    // ConvertAPI convert
+    const convertAPIConvert = document.getElementById('convertapi-convert');
+    if (convertAPIConvert) {
+        convertAPIConvert.addEventListener('click', () => {
+            const apiKey = document.getElementById('convertapi-key').value;
+            const fromFormat = document.getElementById('convertapi-from').value;
+            const toFormat = document.getElementById('convertapi-to').value;
+            const filePath = tabManager.getCurrentFilePath();
+
+            if (!apiKey) {
+                alert('Please enter your ConvertAPI key');
+                return;
+            }
+
+            if (!filePath) {
+                alert('Please save the file first');
+                return;
+            }
+
+            // Save API key for future use
+            localStorage.setItem('convertapi-key', apiKey);
+
+            // Show progress
+            document.getElementById('convertapi-progress').classList.remove('hidden');
+
+            // Send conversion request
+            ipcRenderer.send('convertapi-convert', {
+                apiKey,
+                fromFormat,
+                toFormat,
+                filePath
+            });
+        });
+    }
+});
+
 // IPC event listeners for recent files functionality
 ipcRenderer.on('recent-files-cleared', () => {
     if (tabManager) {