High Contrast Management

[malisipi]

To get more information about why it's required, you can browse #432.

• Support to enable/disable default browser behavior about high contrast.
  • Chrome (Using --disable-features=ForcedColors command line flag)
  • Edge (Using --disable-features=ForcedColors command line flag)
  • Firefox (Using browser.display.document_color_use=1 on WebUI-NoHC profile)
• Detect high contrast theme enabled
  • Windows (Using HKEY_CURRENT_USER\Control Panel\Accessibility\HighContrast -> Flags)
  • Linux (Using gsettings get org.gnome.desktop.a11y.interface high-contrast)
  • MacOS (I have not a Mac computer)
• API to check OS high contrast theme from
  • Backend
  • Frontend

[malisipi]

I am not much knowledge about WebUI Frontend API. So I couldn't implement the API however since backend is exist of API, it should not be hard.
Also I have not a Mac computer, so I can not implement detecting on MacOS.

[hassandraga]

Thank you @malisipi for this new feature, I will try to implement the macOS and frontend part later.

[hassandraga]

Backend (acc77ce).
Frontend (88cd5f3).

Thank you @malisipi for the idea of frontend, now, we have an easy mechanism to internally call any core API from Bridge:

Bridge:

async isHighContrast(): Promise<boolean> {
    // Call a core function and wait for response
    const response = await this.callCore("_YOUR_CORE_SHORT_ID_HERE_") as boolean; // Any datatype
    if (this.#log) console.log(`Core Response: [${response}]`);
    return response;
}

webui.c:

static void _webui_bridge_api_handler(webui_event_t* e) {
    // ...

    if (strcmp(api_name, "_YOUR_CORE_SHORT_ID_HERE_") == 0) {
        webui_return_bool(e, webui_is_high_contrast()); // Any API
    }
}