tigervnc/vncviewer/fltk/theme.cxx

/* Copyright 2011-2022 Pierre Ossman for Cendio AB
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef WIN32
#include <windows.h>
#endif

#ifdef __APPLE__
#include <ApplicationServices/ApplicationServices.h>
#endif

#include <FL/Fl.H>
#include <FL/Fl_Widget.H>
#include <FL/fl_ask.H>

#include "theme.h"

void init_theme()
{
#if defined(WIN32) || defined(__APPLE__)
  static char font_name[256];
#endif

  // Basic text size (10pt @ 96 dpi => 13px)
  FL_NORMAL_SIZE = 13;

  // Select a FLTK scheme and background color that looks somewhat
  // close to modern systems
  Fl::scheme("gtk+");
  Fl::background(220, 220, 220);

  // macOS has a slightly brighter default background though
#ifdef __APPLE__
  Fl::background(240, 240, 240);
#endif

  // This makes the "icon" in dialogs rounded, which fits better
  // with the above schemes.
  fl_message_icon()->box(FL_UP_BOX);

#if defined(WIN32)
  NONCLIENTMETRICS metrics;
  metrics.cbSize = sizeof(metrics);
  if (SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
                           sizeof(metrics), &metrics, 0)) {
    strcpy(font_name, metrics.lfMessageFont.lfFaceName);
    Fl::set_font(FL_HELVETICA, font_name);
  }
#elif defined(__APPLE__)
  CTFontRef font;
  CFStringRef name;

  font = CTFontCreateUIFontForLanguage(kCTFontSystemFontType, 0.0, NULL);
  if (font != NULL) {
    name = CTFontCopyFullName(font);
    if (name != NULL) {
      CFStringGetCString(name, font_name, sizeof(font_name),
                         kCFStringEncodingUTF8);

      Fl::set_font(FL_HELVETICA, font_name);

      CFRelease(name);
    }
    CFRelease(font);
  }
#else
  // FIXME: Get font from GTK or QT
#endif
}