Privacy Browser PC

It turns out this is a whole lot more difficult than I expected.

https://forum.qt.io/topic/93524/qwebengine-open-links-issue/12

3rdparty/chromium/third_party/blink/renderer/core/loader/navigation_policy.cc is getting close to the right place.

src/3rdparty/chromium/chrome/browser/ui/webui/history/navigation_handler.cc contains this example that only applies to navigating the history:

WindowOpenDisposition disposition = ui::DispositionFromClick(
      middle_button, alt_key, ctrl_key, meta_key, shift_key,
      (target_string == "_blank") ? WindowOpenDisposition::NEW_FOREGROUND_TAB
                                  : WindowOpenDisposition::CURRENT_TAB);

It indicates that we are looking for something that calls ui::DispositionFromClick() with the sixth argument set to WindowOpenDisposition::NEW_FOREGROUND_TAB.

This is defined at src/3rdparty/chromium/ui/base/window_open_disposition.h

WindowOpenDisposition DispositionFromClick(
    bool middle_button,
    bool alt_key,
    bool ctrl_key,
    bool meta_key,
    bool shift_key,
    WindowOpenDisposition disposition_for_current_tab =
        WindowOpenDisposition::CURRENT_TAB);

Meaning that, if nothing is specified, the current tab is used by default. So some place this is being set to WindowOpenDisposition::NEW_FOREGROUND_TAB for _blank.

It feels like it ought to be somewhere close to 3rdparty/chromium/content/renderer/render_frame_impl.cc or 3rdparty/chromium/content/renderer/render_view_impl.cc.