source: trunk/src/org/expeditee/gui/Browser.java@ 1434

/**
 *    Browser.java
 *    Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
 *
 *    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 3 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, see <http://www.gnu.org/licenses/>.
 */

package org.expeditee.gui;

import java.io.File;
import java.io.IOException;
import java.net.Authenticator;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;

import org.expeditee.actions.Actions;
import org.expeditee.actions.Simple;
import org.expeditee.agents.mail.MailSession;
import org.expeditee.auth.AuthenticatorBrowser;
import org.expeditee.core.BlockingRunnable;
import org.expeditee.core.Colour;
import org.expeditee.core.Dimension;
import org.expeditee.core.Point;
import org.expeditee.gio.EcosystemManager;
import org.expeditee.gio.EcosystemManager.Ecosystem;
import org.expeditee.gio.GraphicsManager;
import org.expeditee.gio.InputManager;
import org.expeditee.gio.InputManager.WindowEventListener;
import org.expeditee.gio.InputManager.WindowEventType;
import org.expeditee.gio.gesture.StandardGestureActions;
import org.expeditee.io.ProxyAuth;
import org.expeditee.items.Item;
import org.expeditee.items.ItemUtils;
import org.expeditee.items.Text;
import org.expeditee.items.widgets.WidgetCacheManager;
import org.expeditee.network.FrameShare;
import org.expeditee.settings.Settings;
import org.expeditee.settings.UserSettings;
import org.expeditee.stats.Logger;
import org.expeditee.stats.StatsLogger;
import org.expeditee.taskmanagement.EntitySaveManager;
import org.expeditee.taskmanagement.SaveStateChangedEvent;
import org.expeditee.taskmanagement.SaveStateChangedEventListener;

/**
 * The Main GUI class, comprises what people will see on the screen.<br>
 * Note: Each Object (Item) is responsible for drawing itself on the screen.<br>
 * Note2: The Frame is registered as a MouseListener and KeyListener, and
 * processes any Events.
 * 
 * TODO List:
 * 
 * Back to standard:
 *  - JavaFX Text-hitting (requires JFX1.9)
 *  - Overlays and Vectors review
 *  - Pop-ups (unused in base Expeditee, only in Apollo)
 *  - Apollo input (test)
 *  - The rest of Apollo
 *  - Make sure clipping/invalidation takes twin-frames into account
 *  - Reinstate Simple input commands
 *  - Test LinkedTrack.paintInFreeSpace()
 *  - Test EmulatedTextItem.onMouseReleased(MouseEvent) (removed emulatedSource mouse button check)
 *  - Constrained placement of items
 *  
 * Extra:
 *  - Self-describing input
 *  - Thread safety (most stuff on GIO event thread but Agents can start new threads)
 *  - Touch input
 *  - Better reflection??? (currently changes to the code break reflection as it relies on names)
 *  - JavaFX lag (always rendering to images doesn't gel well with JavaFX)
 *  - Swing widgets in JFX
 *  - JavaFX Widgets (exception on drawing?)
 *  - Reduce reliance on into-image rendering to improve JavaFX performance (utilise enforced-clip)
 *  - Block Swing ecosystem setup until window is available, or...
 *  - Reconfigure window-resized code so things are properly resized (PREFERRED).
 *  - Swing alpha-compositing of colours (currently alpha is ignored e.g. drop-shadow in transition).
 *  - Overly-thick extrusion lines (seems to depend on number of connected lines...)
 *  - Make FreeItems control pickup etc.
 *  - Remove MouseEventRouter
 *  - Highlighting (should be controlled by the items themselves)
 *  - Make Widgets into fully-fledged items (maybe???)
 *  - Merge Widget and HeavyDutyWidget
 *  - Redefine TextLayouts (relative/absolute layouts)
 *  - Settings exceptions (Password widget in JFX) (currently fixed with hack)
 *  - MessageBay (what did I mean by this specifically?)
 *  - Order-dependency of start-up code
 *  - MessageBay not refreshing at start-up
 *  - Invalidation hierarchy (item => frame => display controller area => window)
 *  - Add gesture data type checking
 *  - Paintable interface
 *  - EcosystemSpecific interface (utilise to enable/disable features based on ecosystem)
 *  - Remove/modify Mutable class (in Apollo.util, change to InOutReference)
 *  - Convert BlockingRunnable to interface
 *  - Modify Metronome to utilise Timeouts
 *  - Need AWT in FastAlphaEffect???
 *  
 * General:
 *  - Tidy FrameGraphics
 *  - Comment
 *  - UserSettings.DEFAULT_PROFILE_NAME not actually a user setting
 * 
 * Done:
 *  - Timers
 *  - Timer input animations
 *  - Finish DisplayController/FrameGraphics separation
 *  - Anchor constraints (create class)
 *  - Make MessageBay take lead from DisplayController
 *  - Make message bay display again (to do with above)
 *  - Tooltips (layout broken in Swing as window size not correct when tooltips laid out)
 *  - Frame transitions
 *  - Frame transitions in twin-frames mode drawing over each other
 *  - JFX DnD manager
 *  - Reinstate Simple
 *  - Reinstate exclude source
 *  - Reinstate commented code
 *  - Twin-frames division 0 at startup
 *  - Twin frames off-by-one frame size (draws a line of erroneous pixels)
 *  - MessageBay delays showing messages on start-up
 *  - JFX Antialiasing done on theScene??? Doesn't apply for our situation
 *  - Incorporate Clip class into code
 *  - Enforced clip
 * 
 * @author cts16
 * @author jdm18
 */
public class Browser implements SaveStateChangedEventListener {
        
        public static final Ecosystem ECOSYSTEM_TYPE = Ecosystem.Swing;

        public static Browser _theBrowser = null;
        
        public static ProxyAuth proxyAuth = new ProxyAuth();

        public static boolean _hasExited = false;

        /** A flag which is set once the application is exiting. */
        protected boolean _isExiting = false;

        protected static boolean _initComplete = false;
        
        private static String _startFrame = null;


        /**
         * Constructs a new Browser object, then launches it
         * 
         * @param args
         */
        public static void main(String[] args) {
                if (AuthenticatorBrowser.isAuthenticationRequired()) {
                        String starting_user_name = System.getProperty("user.name");
                        System.setProperty("startinguser.name", starting_user_name);
                        System.setProperty("user.name", AuthenticatorBrowser.USER_NOBODY);
                }
                
                // Parse the starting frame command-line argument
                if(args.length > 0) {
                        setStartFrame(args[0]);
                        if(!Character.isDigit(getStartFrame().charAt(getStartFrame().length() - 1))) {
                                setStartFrame(getStartFrame() + "1");
                        }
                } else {
                    setStartFrame("home1");
                }

                // Window icon must be set before initialisation
                GraphicsManager.setWindowIcon(DisplayController.ICON_IMAGE);
                
                // Setup the GIO ecosystem so it is ready when we need it
                EcosystemManager.createEcosystem(ECOSYSTEM_TYPE);
                
                try {
                        EcosystemManager.getMiscManager().runOnGIOThread(new BlockingRunnable() {
                                @Override
                                public void execute() {
                                        init();
                                }
                        });
                } catch (Throwable e) {
                        e.printStackTrace(System.err);
                        System.exit(1);
                }
                
                DisplayController.requestRefresh(false, () -> { MessageBay.showDelayedMessages(false); return true; });
        }
        
        public static void init() {
                if (AuthenticatorBrowser.isAuthenticationRequired()) {
                        try {
                                _theBrowser = AuthenticatorBrowser.getInstance();
                        } catch (KeyStoreException | NoSuchAlgorithmException | CertificateException | IOException | ClassNotFoundException | SQLException e) {
                                e.printStackTrace();
                        }
                } else {
                        _theBrowser = new Browser();
                }               

                EcosystemManager.getGraphicsManager().requestFocus();
                
                // Java's way of getting access to internet.  Authenticating the user with their proxy username and password.
                Authenticator.setDefault(proxyAuth);
                
                _initComplete = true;
        }

        /**
         * @return
         * 
         * True if the application is about to exit. False if not. Note that this is
         * only set once the window is in its closed state (not closing) or if the
         * application has explicitly being requested to exit.
         * 
         * @see Browser#exit()
         * 
         */
        public boolean isExiting() {
                return _isExiting;
        }

        public static boolean isInitComplete() {
                return _initComplete;
        }
        
        protected Browser(String mode) {
                System.out.println("Running Expeditee in " + mode + " mode.");
        }

        protected Browser() {
                // center the frame on the screen
                GraphicsManager g = EcosystemManager.getGraphicsManager();
                Dimension screen = g.getScreenSize();
                double xpos = (screen.width - UserSettings.InitialWidth.get()) / 2.0;
                double ypos = (screen.height - UserSettings.InitialHeight.get()) / 2.0;
                g.setWindowLocation(new Point((int) xpos, (int) ypos));

                DisplayController.Init();

                DisplayController.addDisplayObserver(WidgetCacheManager.getInstance());
                if (ECOSYSTEM_TYPE == Ecosystem.Swing) {
                        DisplayController.addDisplayObserver(PopupManager.getInstance());
                }

                setInputManagerWindowRoutines();

                // Reset windows to user specified size
                Dimension initialWindowSize = new Dimension(UserSettings.InitialWidth.get(), UserSettings.InitialHeight.get());
                g.setWindowSize(initialWindowSize);

                // Load documentation and start pages
                FrameUtils.extractResources(false);

                // Load fonts before loading any frames so the items on the frames will be able
                // to access their fonts
                Text.InitFonts();

                if (!AuthenticatorBrowser.isAuthenticationRequired() && UserSettings.PublicAndPrivateResources) {
                        String userName = System.getProperty("user.name"); //UserSettings.ProfileName.get();
                        if (!FrameIO.personalResourcesExist(userName)) {
                                FrameIO.setupPersonalResources(userName);
                        }
                }
                
                Settings.Init();
                Frame userProfile = loadInitialProfiles();
                FrameIO.changeParentAndSubFolders(FrameIO.PARENT_FOLDER);
                
                // Listen for save status to display during and after runtime
                EntitySaveManager.getInstance().addSaveStateChangedEventListener(this);

                try {
                        MessageBay.warningMessages(Actions.Init());
                        
                        // Go to the start frame if specified, otherwise go to the profile frame
                        if (getStartFrame() == null) {
                                setStartFrame(UserSettings.StartFrame.get());
                                if (getStartFrame() != null && !Character.isDigit(getStartFrame().charAt(getStartFrame().length() - 1))) {
                                        setStartFrame(getStartFrame() + "1");
                                }
                        }

                        Frame start = null;
                        if ((start = FrameIO.LoadFrame(getStartFrame())) != null) {
                                // Make sure HomeFrame gets set
                                UserSettings.HomeFrame.set(start.getName());

                                // Go to the start frame
                                DisplayController.setCurrentFrame(start, true);
                        } else {
                                // If an invalid start frame was specified, show a warning
                                if (getStartFrame() != null) {
                                        MessageBay.warningMessage("Unknown frame: " + getStartFrame());
                                }

                                // Go to the profile frame
                                FrameUtils.loadFirstFrame(userProfile);
                        }

                        DisplayController.updateTitle();

                        // Don't refresh for the profile frame otherwise error messages are shown twice
                        if (!DisplayController.getCurrentFrame().equals(userProfile)) {
                                StandardGestureActions.Refresh();
                                // If it's the profile frame just reparse it in order to display
                                // images/circles/widgets correctly
                        } else {
                                FrameUtils.Parse(userProfile);
                        }
                } catch (Exception e) {
                        e.printStackTrace();
                        Logger.Log(e);
                }
        }

        @Override
        public void saveCompleted(SaveStateChangedEvent event)
        {
                MessageBay.displayMessage("Save finished!", Colour.BLUE);
        }

        @Override
        public void saveStarted(SaveStateChangedEvent event)
        {
                String name = event.getEntity().getSaveName();
                if (name == null) {
                        name = "data";
                }
                MessageBay.displayMessage("Saving " + name + "...", Colour.BLUE);
        }

        /**
         * Closes the browser and ends the application. Performs saving operations -
         * halting until saves have completed. Feedback is given to the user while
         * the application is exiting. Must call on the swing thread.
         */
        public void exit() {

                // Set exiting flag
                _isExiting = true;

                MessageBay.displayMessage("System exiting...");

                /**
                 * TODO: Prompt the user etc.
                 */

                // TODO: Should we should a popup with a progress bar for user feedback?
                // this would be nice and easy to do.
                // Exit on a dedicated thread so that feedback can be obtained
                new Exiter().start(); // this will exit the application
        }

        /**
         * The system must exit on a different thread other than the swing thread so
         * that the save threads can fire save-feedback to the swing thread and thus
         * provide user feedback on asynchronous save operations.
         * 
         * @author Brook Novak
         * 
         */
        private class Exiter extends Thread {

                @Override
                public void run() {

                        // The final save point for saveable entities
                        EntitySaveManager.getInstance().saveAll();
                        try {
                                EntitySaveManager.getInstance().waitUntilAllSavingFinished();
                        } catch (InterruptedException e) {
                                e.printStackTrace();
                        }
                        
                        // Stop any agents or simple programs
                        Simple.stop();
                        Actions.stopAgent();
                        // Wait for them to stop
                        try {
                                // Only stop if need to...
                                // Brook: What purpose does this serve?
                                MessageBay.displayMessage("Stopping Simple programs...");
                                while (Simple.isProgramRunning()) {
                                        Thread.sleep(100);
                                }
                                
                                MessageBay.displayMessage("Stopping Agents...");
                                /* TODO: Only stop if need to... */
                                while (Actions.isAgentRunning()) {
                                        Thread.sleep(100); // Brook: What purpose does this serve?
                                }
                        } catch (Exception e) {

                        }

                        MessageBay.displayMessage("Saving current frame...");
                        FrameIO.SaveFrame(DisplayController.getCurrentFrame());

                        MessageBay.displayMessage("Saving stats...");
                        StatsLogger.WriteStatsFile();

                        if (MailSession.getInstance() != null) {
                                if (MailSession.getInstance().finalise()) {
                                        // TODO display this message before the finalising
                                        // is done but only if the mail needs closing
                                        MessageBay.displayMessage("Closed ExpMail...");
                                }
                        }

                        if (FrameShare.getInstance() != null) {
                                MessageBay.displayMessage("Stopping FrameServer...");
                                FrameShare.getInstance().finalise();
                        }

                        MessageBay.displayMessage("System exited");

                        // Finally remove the messages frameset
                        FrameIO.moveFrameset("messages", FrameIO.MESSAGES_PATH, false);

                        /*
                         * Create a new messages folder so that it doesn't throw
                         * Exceptions when two Expeditee's open at once and the
                         * second tries to save its messages
                         */
                        File file = new File(FrameIO.MESSAGES_PATH + "messages");
                        file.mkdirs();

                        Browser._hasExited = true;
                        
                        System.exit(0);
                }
        }

        /**
         * Used to set up the the browser for use in testing.
         * 
         * @return
         */
        public static Browser initializeForTesting()
        {
                if (Browser._theBrowser == null) {
                        FrameShare.disableNetworking = true;
                        MailSession._autoConnect = false;

                        Browser.main(new String[]{});
                        try {
                                while (!isInitComplete()) {
                                        Thread.sleep(10);
                                }
                        } catch (Exception e) {
                        }
                }
                return _theBrowser;
        }
        
        private static void setInputManagerWindowRoutines()     {
                InputManager manager = EcosystemManager.getInputManager();
                
            // Refresh the layout when the window resizes
                manager.addWindowEventListener(new WindowEventListener() {
                        @Override
                        public void onWindowEvent(WindowEventType type)
                        {
                                if (type != WindowEventType.WINDOW_RESIZED) {
                                        return;
                                }
                                DisplayController.refreshWindowSize();
                                FrameIO.RefreshCacheImages();
                                for (Frame frame : DisplayController.getFrames()) {
                                        if (frame != null) {
                                                ItemUtils.Justify(frame);
                                                frame.refreshSize();
                                        }
                                }
                                DisplayController.requestRefresh(false);
                        }
                });
                
                manager.addWindowEventListener(new WindowEventListener() {
                        @Override
                        public void onWindowEvent(WindowEventType type)
                        {
                                if (type != WindowEventType.MOUSE_EXITED_WINDOW) {
                                        return;
                                }
                                StandardGestureActions.mouseExitedWindow();
                        }
                });
                
                manager.addWindowEventListener(new WindowEventListener() {
                        @Override
                        public void onWindowEvent(WindowEventType type)
                        {
                                if (type != WindowEventType.MOUSE_ENTERED_WINDOW) {
                                        return;
                                }
                                StandardGestureActions.mouseEnteredWindow();
                        }
                });
                
                manager.addWindowEventListener(new WindowEventListener() {
                        @Override
                        public void onWindowEvent(WindowEventType type)
                        {
                                if (type != WindowEventType.WINDOW_CLOSED) {
                                        return;
                                }
                                if (Browser._theBrowser != null) {
                                        Browser._theBrowser.exit();
                                }
                        }
                });
        }

        /**
         * @return The user's profile frame.
         */
        public static Frame loadInitialProfiles()
        {
                String defaultProfileName = UserSettings.DEFAULT_PROFILE_NAME;
                String userName = System.getProperty("user.name");

                Frame defaultProfile = loadProfile(defaultProfileName);
                Frame userProfile = loadProfile(userName);
                
                MessageBay.warningMessages(FrameUtils.ParseProfile(defaultProfile));
                
                // Save the cursor if the defaultProfile had a custom cursor
                Collection<Item> cursor = null;
                if(FreeItems.hasCursor()) {
                        cursor = new ArrayList<Item>();
                        cursor.addAll(FreeItems.getCursor());
                }
                
                //MessageBay.warningMessages(FrameUtils.ParseProfile(userProfile));
                
                if (cursor != null && !FreeItems.hasCursor()) {
                        FreeItems.setCursor(cursor);
                }
                
                FrameUtils.ParseProfile(userProfile);
                
                return userProfile;
        }

        protected static Frame loadProfile(String userName)     {
                Frame profile = FrameIO.LoadProfile(userName);
                
                if (profile == null) {
                        try {
                                profile = FrameIO.CreateNewProfile(userName, null, null);
                        } catch (Exception e) {
                                // TODO tell the user that there was a problem creating the
                                // profile frame and close nicely
                                e.printStackTrace();
                                assert (false);
                        }
                }
                return profile;
        }

        public static String getStartFrame() {
                return _startFrame;
        }

        public static void setStartFrame(String _startFrame) {
                Browser._startFrame = _startFrame;
        }
}