README

# Simple Markdown Editor

A simple Markdown editor and live previewer built with Delphi FMX.

The app uses the delphi-markdown library to convert Markdown to HTML, then renders it in an FMX TWebBrowser.

Features

• Edit Markdown text with live HTML preview.
• Open and save .md files.
• Apply heading markers (#, ##, ###, ####) from toolbar buttons.
• Wrap selected text as fenced code blocks.
• Increase/decrease font scale for editor and preview.
• Customize preview styling in markdowneditor.css.
• Persist window position/state in config/config.ini.
• Optional file-open from command line (MarkdownViewer.exe <file.md>).

Requirements

• Delphi (FMX-capable; Windows build currently configured in this repo).
• delphi-markdown source code.

Dependency Setup (delphi-markdown)

1. Clone or download:
   • https://github.com/grahamegrieve/delphi-markdown
2. In Delphi, add the folder containing the markdown units to the project/library search path.
3. Ensure these units are resolvable by the compiler:
   • MarkdownProcessor
   • (and its related units from the same library)

If the dependency path is not configured, the project will fail to compile with missing unit errors.

Build and Run

1. Open SimpleMarkdownEditor.dproj in Delphi.
2. Select a target (typically Win32 or Win64).
3. Build and run.

The executable is generated under:

• Win32\Debug\SimpleMarkdownEditor.exe (or corresponding platform/configuration path)

Usage

• Open: load a Markdown file.
• Save: save current text to .md.
• Refresh: regenerate preview.
• A+/A-: adjust font scale.
• Title: apply heading levels.
• Code: wrap selected text with triple backticks.

Styling

Preview styles are in:

• SimpleMarkdownEditor.css

The application injects runtime values (such as background color and body font scale) into this CSS via LoadCSS in:

• SimpleMarkdownEditor.gui.pas

Project Files

• SimpleMarkdownEditor.dpr: application entry point.
• SimpleMarkdownEditor.dproj: Delphi project configuration.
• SimpleMarkdownEditor.gui.pas: main form logic, Markdown processing, preview refresh.
• SimpleMarkdownEditor.gui.fmx: form/UI layout.
• SimpleMarkdownEditor.css: HTML preview theme.

Latest fixes

2026-02-17

• Almost instant refresh updates for the HTML preview
• Reverted from mdDaringFireball dialect to mdCommonMark due some formatting issues.
• Fixed issue when loading a markdown that contains images
• More minor fixes
• Added Bold, Italic and Strike through text formatting

2026-02-16

• Added confirmation to save file if changes were made
• Once editing a page the html preview should scroll to the last changed position, this is a ugly way to try sync editing with preview
• Reduced the refresh timeout from 5 to 3 seconds
• Changed markdown dialect to mdDaringFireball which handles better the malformed markdown texts
• Change application icon
• Other minor behavior changes