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Fixed line breaks

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This commit is contained in:
Jorge Antonio Diaz-Benito Soriano 2014-10-25 20:43:23 +02:00
parent 3877ddf85a
commit 1629981256
1 changed files with 88 additions and 9 deletions
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97
src/com/owncloud/android/ui/preview/PreviewTextFragment.java
View file

@ -1,15 +1,22 @@
package com.owncloud.android.ui.preview;
import android.accounts.Account;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.actionbarsherlock.view.Menu;
@ -21,6 +28,7 @@ import com.owncloud.android.files.FileMenuFilter;
import com.owncloud.android.lib.common.utils.Log_OC;
import com.owncloud.android.ui.activity.FileDisplayActivity;
import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
import com.owncloud.android.ui.dialog.LoadingDialog;
import com.owncloud.android.ui.dialog.RemoveFileDialogFragment;
import com.owncloud.android.ui.fragment.FileFragment;
@ -29,7 +37,9 @@ import java.io.FileInputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Scanner;
public class PreviewTextFragment extends FileFragment {
@ -39,7 +49,6 @@ public class PreviewTextFragment extends FileFragment {
private Account mAccount;
private ListView mTextPreviewList;
private ProgressBar mProgressBar;
/**
* Creates an empty fragment for previews.
@ -69,7 +78,6 @@ public class PreviewTextFragment extends FileFragment {
mTextPreviewList = (ListView) ret.findViewById(R.id.text_preview_list);
mTextPreviewList.setAdapter(new TextLineAdapter());
mProgressBar = (ProgressBar) ret.findViewById(R.id.progress_bar);
return ret;
}
@ -131,10 +139,26 @@ public class PreviewTextFragment extends FileFragment {
* Reads the file to preview and shows its contents. Too critical to be anonymous.
*/
private class TextLoadAsyncTask extends AsyncTask<Object, StringWriter, Void> {
private int TEXTVIEW_WIDTH;
private float TEXTVIEW_SIZE;
private final Queue<Character> accumulatedText = new LinkedList<Character>();
private final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
private final Rect bounds = new Rect();
private final Paint paint = new Paint();
@SuppressLint("InflateParams")
@Override
protected void onPreExecute() {
((TextLineAdapter) mTextPreviewList.getAdapter()).clear();
DisplayMetrics displaymetrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
TEXTVIEW_WIDTH = displaymetrics.widthPixels;
TEXTVIEW_SIZE = ((TextView) ((LayoutInflater) getActivity().getApplicationContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE))
.inflate(
R.layout.text_file_preview_list_item, null)).getTextSize();
showLoadingDialog();
paint.setTextSize(TEXTVIEW_SIZE);
}
@Override
@ -172,22 +196,67 @@ public class PreviewTextFragment extends FileFragment {
sc.close();
}
}
//Add the remaining text, if any
while (!accumulatedText.isEmpty()) {
addLine();
}
return null;
}
@Override
protected void onProgressUpdate(StringWriter... values) {
super.onProgressUpdate(values);
//Using a ListView allows to show large text without the UI freeze that happens
//when calling TextView#setText() with a large CharSequence
((TextLineAdapter) mTextPreviewList.getAdapter()).add(values[0].toString());
final char[] newTextAsCharArray = values[0].toString().toCharArray();
for (char c : newTextAsCharArray) {
accumulatedText.add(c);
}
addLine();
}
private synchronized void addLine() {
StringBuilder textForThisLine = new StringBuilder();
do {
Character polled = accumulatedText.poll();
textForThisLine.append(polled);
}
while (!isTooLarge(textForThisLine.toString()) && !accumulatedText.isEmpty());
String line = textForThisLine.toString();
((TextLineAdapter) mTextPreviewList.getAdapter()).add(line.contentEquals("null") ? "" : line);
}
private boolean isTooLarge(String text) {
paint.getTextBounds(text, 0, text.length(), bounds);
int lineWidth = (int) Math.ceil(bounds.width());
return lineWidth / TEXTVIEW_WIDTH > 1;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
mProgressBar.setVisibility(View.GONE);
mTextPreviewList.setVisibility(View.VISIBLE);
dismissLoadingDialog();
}
/**
* Show loading dialog
*/
public void showLoadingDialog() {
// Construct dialog
LoadingDialog loading = new LoadingDialog(getResources().getString(R.string.wait_a_moment));
FragmentManager fm = getActivity().getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
loading.show(ft, DIALOG_WAIT_TAG);
}
/**
* Dismiss loading dialog
*/
public void dismissLoadingDialog() {
Fragment frag = getActivity().getSupportFragmentManager().findFragmentByTag(DIALOG_WAIT_TAG);
if (frag != null) {
LoadingDialog loading = (LoadingDialog) frag;
loading.dismiss();
}
}
}
@ -197,12 +266,22 @@ public class PreviewTextFragment extends FileFragment {
private void add(String line) {
items.add(line);
notifyDataSetChanged();
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
notifyDataSetChanged();
}
});
}
private void clear() {
items.clear();
notifyDataSetChanged();
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
notifyDataSetChanged();
}
});
}
@Override