net.idlesoft.android.apps.github.activities.CommitChangeViewer.java Source code

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Here is the source code for net.idlesoft.android.apps.github.activities.CommitChangeViewer.java

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/**
 * Hubroid - A GitHub app for Android
 *
 * Copyright (c) 2011 Eddie Ringle.
 *
 * Licensed under the New BSD License.
 */

package net.idlesoft.android.apps.github.activities;

import com.flurry.android.FlurryAgent;

import net.idlesoft.android.apps.github.R;

import org.idlesoft.libraries.ghapi.GitHubAPI;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Environment;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.ImageButton;
import android.widget.TextView;

import java.io.File;

public class CommitChangeViewer extends Activity {
    private SharedPreferences.Editor mEditor;

    private final GitHubAPI mGapi = new GitHubAPI();

    public Intent mIntent;

    public JSONObject mJson;

    private String mPassword;

    private SharedPreferences mPrefs;

    public String mRepositoryName;

    public String mRepositoryOwner;

    private String mUsername;

    @Override
    public void onCreate(final Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.commit_view);

        mPrefs = getSharedPreferences(Hubroid.PREFS_NAME, 0);
        mEditor = mPrefs.edit();

        mUsername = mPrefs.getString("username", "");
        mPassword = mPrefs.getString("password", "");

        mGapi.authenticate(mUsername, mPassword);

        ((ImageButton) findViewById(R.id.btn_search)).setOnClickListener(new OnClickListener() {
            public void onClick(final View v) {
                startActivity(new Intent(CommitChangeViewer.this, Search.class));
            }
        });

        final TextView title = (TextView) findViewById(R.id.tv_page_title);
        title.setText("Commit Diff");

        final Bundle extras = getIntent().getExtras();
        if (extras != null) {
            mRepositoryName = extras.getString("repo_name");
            mRepositoryOwner = extras.getString("repo_owner");
            try {
                mJson = new JSONObject(extras.getString("json"));

                /*
                 * This new method of displaying file diffs was inspired by
                 * iOctocat's approach. Thanks to Dennis Bloete (dbloete on
                 * GitHub) for creating iOctocat and making me realize Android
                 * needed some GitHub love too. ;-)
                 */
                final WebView webView = (WebView) findViewById(R.id.wv_commitView_diff);

                /*
                 * Prepare CSS for diff: Added lines are green, removed lines
                 * are red, and the special lines that specify how many lines
                 * were affected in the chunk are a light blue.
                 */
                String content = "<style type=\"text/css\">" + "div {" + "margin-right: 100%25;"
                        + "font-family: monospace;" + "white-space: nowrap;" + "display: inline-block;" + "}"
                        + ".lines {" + "background-color: #EAF2F5;" + "}" + ".added {"
                        + "background-color: #DDFFDD;" + "}" + ".removed {" + "background-color: #FFDDDD;" + "}"
                        + "</style>";

                final String[] splitDiff = mJson.getString("diff").split("\n");
                for (int i = 0; i < splitDiff.length; i++) {
                    // HTML encode any elements, else any diff containing
                    // "<div>" or any HTML element will be interpreted as one by
                    // the browser
                    splitDiff[i] = TextUtils.htmlEncode(splitDiff[i]);

                    // Replace all tabs with four non-breaking spaces (most
                    // browsers truncate "\t+" to " ").
                    splitDiff[i] = splitDiff[i].replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;");

                    // Replace any sequence of two or more spaces with &nbsps
                    // (most browsers truncate " +" to " ").
                    splitDiff[i] = splitDiff[i].replaceAll("(?<= ) ", "&nbsp;");

                    if (splitDiff[i].startsWith("@@")) {
                        splitDiff[i] = "<div class=\"lines\">".concat(splitDiff[i].concat("</div>"));
                    } else if (splitDiff[i].startsWith("+")) {
                        splitDiff[i] = "<div class=\"added\">".concat(splitDiff[i].concat("</div>"));
                    } else if (splitDiff[i].startsWith("-")) {
                        splitDiff[i] = "<div class=\"removed\">".concat(splitDiff[i].concat("</div>"));
                    } else {
                        // Add an extra space before lines not beginning with
                        // "+" or "-" to make them line up properly
                        if (splitDiff[i].length() > 0) {
                            splitDiff[i] = "<div>&nbsp;".concat(splitDiff[i].substring(1).concat("</div>"));
                        }
                    }
                    content += splitDiff[i];
                }
                webView.loadData(content, "text/html", "UTF-8");

            } catch (final JSONException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        switch (item.getItemId()) {
        case 0:
            final Intent i1 = new Intent(this, Hubroid.class);
            startActivity(i1);
            return true;
        case 1:
            mEditor.clear().commit();
            final Intent intent = new Intent(this, Hubroid.class);
            startActivity(intent);
            return true;
        case 2:
            final File root = Environment.getExternalStorageDirectory();
            if (root.canWrite()) {
                final File hubroid = new File(root, "hubroid");
                if (!hubroid.exists() && !hubroid.isDirectory()) {
                    return true;
                } else {
                    hubroid.delete();
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public boolean onPrepareOptionsMenu(final Menu menu) {
        if (!menu.hasVisibleItems()) {
            menu.add(0, 0, 0, "Back to Main").setIcon(android.R.drawable.ic_menu_revert);
            menu.add(0, 1, 0, "Clear Preferences");
            menu.add(0, 2, 0, "Clear Cache");
        }
        return true;
    }

    @Override
    public void onStart() {
        super.onStart();
        FlurryAgent.onStartSession(this, "K8C93KDB2HH3ANRDQH1Z");
    }

    @Override
    public void onStop() {
        super.onStop();
        FlurryAgent.onEndSession(this);
    }
}