Platform.java

/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

/*
  Part of the Processing project - http://processing.org

  Copyright (c) 2008 Ben Fry and Casey Reas

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

package processing.app.linux;

import processing.app.PreferencesData;
import processing.app.legacy.PConstants;

import java.awt.Font;
import java.io.File;

import javax.swing.UIManager;


/**
 * Used by Base for platform-specific tweaking, for instance finding the
 * sketchbook location using the Windows registry, or OS X event handling.
 */
public class Platform extends processing.app.Platform {

  // TODO Need to be smarter here since KDE people ain't gonna like that GTK.
  //      It may even throw a weird exception at 'em for their trouble.
  @Override
  public void setLookAndFeel() throws Exception {
    GTKLookAndFeelFixer.installGtkPopupBugWorkaround();
  }


  @Override
  public File getDefaultSketchbookFolder() throws Exception {
    File home = new File(System.getProperty("user.home"));
    return new File(home, "Arduino");
  }


  @Override
  public void openURL(String url) throws Exception {
    if (openFolderAvailable()) {
      String launcher = PreferencesData.get("launcher");
      if (launcher != null) {
        Runtime.getRuntime().exec(new String[] { launcher, url });
      }
    }
  }


  @Override
  public boolean openFolderAvailable() {
    if (PreferencesData.get("launcher") != null) {
      return true;
    }

    // Attempt to use xdg-open
    try {
      Process p = Runtime.getRuntime().exec(new String[] { "xdg-open" });
      p.waitFor();
      PreferencesData.set("launcher", "xdg-open");
      return true;
    } catch (Exception e) { }

    // Attempt to use gnome-open
    try {
      Process p = Runtime.getRuntime().exec(new String[] { "gnome-open" });
      p.waitFor();
      // Not installed will throw an IOException (JDK 1.4.2, Ubuntu 7.04)
      PreferencesData.set("launcher", "gnome-open");
      return true;
    } catch (Exception e) { }

    // Attempt with kde-open
    try {
      Process p = Runtime.getRuntime().exec(new String[] { "kde-open" });
      p.waitFor();
      PreferencesData.set("launcher", "kde-open");
      return true;
    } catch (Exception e) { }

    return false;
  }


  @Override
  public void openFolder(File file) throws Exception {
    if (openFolderAvailable()) {
      String launcher = PreferencesData.get("launcher");
      try {
        String[] params = new String[] { launcher, file.getAbsolutePath() };
        //processing.core.PApplet.println(params);
        /*Process p =*/ Runtime.getRuntime().exec(params);
        /*int result =*/ //p.waitFor();
      } catch (Exception e) {
        e.printStackTrace();
      }
    } else {
      System.out.println("No launcher set, cannot open " +
                         file.getAbsolutePath());
    }
  }

  @Override
  public String getName() {
    return PConstants.platformNames[PConstants.LINUX];
  }

  private int detectedDpi = -1;

  @Override
  public int getSystemDPI() {
    if (detectedDpi != -1)
      return detectedDpi;

    // we observed that JMenu fonts in java follows the
    // System DPI settings, so we compare it to the standard
    // font size (12) to obtain a rough estimate of DPI.
    Font menuFont = UIManager.getFont("Menu.font");
    detectedDpi = menuFont.getSize() * 96 / 12;
    return detectedDpi;
  }
}