diff options
Diffstat (limited to 'src/com/android/swe/browser/homepages/Template.java')
| -rw-r--r-- | src/com/android/swe/browser/homepages/Template.java | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/src/com/android/swe/browser/homepages/Template.java b/src/com/android/swe/browser/homepages/Template.java new file mode 100644 index 00000000..e918b07d --- /dev/null +++ b/src/com/android/swe/browser/homepages/Template.java @@ -0,0 +1,281 @@ +
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.browser.homepages;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.database.Cursor;
+import android.util.TypedValue;
+
+import com.android.browser.R;
+
+public class Template {
+
+ private static HashMap<Integer, Template> sCachedTemplates = new HashMap<Integer, Template>();
+
+ public static Template getCachedTemplate(Context context, int id) {
+ synchronized (sCachedTemplates) {
+ Template template = sCachedTemplates.get(id);
+ if (template == null) {
+ template = new Template(context, id);
+ sCachedTemplates.put(id, template);
+ }
+ // Return a copy so that we don't share data
+ return template.copy();
+ }
+ }
+
+ interface Entity {
+ void write(OutputStream stream, EntityData params) throws IOException;
+ }
+
+ interface EntityData {
+ void writeValue(OutputStream stream, String key) throws IOException;
+ ListEntityIterator getListIterator(String key);
+ }
+
+ interface ListEntityIterator extends EntityData {
+ void reset();
+ boolean moveToNext();
+ }
+
+ static class StringEntity implements Entity {
+
+ byte[] mValue;
+
+ public StringEntity(String value) {
+ mValue = value.getBytes();
+ }
+
+ @Override
+ public void write(OutputStream stream, EntityData params) throws IOException {
+ stream.write(mValue);
+ }
+
+ }
+
+ static class SimpleEntity implements Entity {
+
+ String mKey;
+
+ public SimpleEntity(String key) {
+ mKey = key;
+ }
+
+ @Override
+ public void write(OutputStream stream, EntityData params) throws IOException {
+ params.writeValue(stream, mKey);
+ }
+
+ }
+
+ static class ListEntity implements Entity {
+
+ String mKey;
+ Template mSubTemplate;
+
+ public ListEntity(Context context, String key, String subTemplate) {
+ mKey = key;
+ mSubTemplate = new Template(context, subTemplate);
+ }
+
+ @Override
+ public void write(OutputStream stream, EntityData params) throws IOException {
+ ListEntityIterator iter = params.getListIterator(mKey);
+ iter.reset();
+ while (iter.moveToNext()) {
+ mSubTemplate.write(stream, iter);
+ }
+ }
+
+ }
+
+ public abstract static class CursorListEntityWrapper implements ListEntityIterator {
+
+ private Cursor mCursor;
+
+ public CursorListEntityWrapper(Cursor cursor) {
+ mCursor = cursor;
+ }
+
+ @Override
+ public boolean moveToNext() {
+ return mCursor.moveToNext();
+ }
+
+ @Override
+ public void reset() {
+ mCursor.moveToPosition(-1);
+ }
+
+ @Override
+ public ListEntityIterator getListIterator(String key) {
+ return null;
+ }
+
+ public Cursor getCursor() {
+ return mCursor;
+ }
+
+ }
+
+ static class HashMapEntityData implements EntityData {
+
+ HashMap<String, Object> mData;
+
+ public HashMapEntityData(HashMap<String, Object> map) {
+ mData = map;
+ }
+
+ @Override
+ public ListEntityIterator getListIterator(String key) {
+ return (ListEntityIterator) mData.get(key);
+ }
+
+ @Override
+ public void writeValue(OutputStream stream, String key) throws IOException {
+ stream.write((byte[]) mData.get(key));
+ }
+
+ }
+
+ private List<Entity> mTemplate;
+ private HashMap<String, Object> mData = new HashMap<String, Object>();
+ private Template(Context context, int tid) {
+ this(context, readRaw(context, tid));
+ }
+
+ private Template(Context context, String template) {
+ mTemplate = new ArrayList<Entity>();
+ template = replaceConsts(context, template);
+ parseTemplate(context, template);
+ }
+
+ private Template(Template copy) {
+ mTemplate = copy.mTemplate;
+ }
+
+ Template copy() {
+ return new Template(this);
+ }
+
+ void parseTemplate(Context context, String template) {
+ final Pattern pattern = Pattern.compile("<%([=\\{])\\s*(\\w+)\\s*%>");
+ Matcher m = pattern.matcher(template);
+ int start = 0;
+ while (m.find()) {
+ String static_part = template.substring(start, m.start());
+ if (static_part.length() > 0) {
+ mTemplate.add(new StringEntity(static_part));
+ }
+ String type = m.group(1);
+ String name = m.group(2);
+ if (type.equals("=")) {
+ mTemplate.add(new SimpleEntity(name));
+ } else if (type.equals("{")) {
+ Pattern p = Pattern.compile("<%\\}\\s*" + Pattern.quote(name) + "\\s*%>");
+ Matcher end_m = p.matcher(template);
+ if (end_m.find(m.end())) {
+ start = m.end();
+ m.region(end_m.end(), template.length());
+ String subTemplate = template.substring(start, end_m.start());
+ mTemplate.add(new ListEntity(context, name, subTemplate));
+ start = end_m.end();
+ continue;
+ }
+ }
+ start = m.end();
+ }
+ String static_part = template.substring(start, template.length());
+ if (static_part.length() > 0) {
+ mTemplate.add(new StringEntity(static_part));
+ }
+ }
+
+ public void assign(String name, String value) {
+ mData.put(name, value.getBytes());
+ }
+
+ public void assignLoop(String name, ListEntityIterator iter) {
+ mData.put(name, iter);
+ }
+
+ public void write(OutputStream stream) throws IOException {
+ write(stream, new HashMapEntityData(mData));
+ }
+
+ public void write(OutputStream stream, EntityData data) throws IOException {
+ for (Entity ent : mTemplate) {
+ ent.write(stream, data);
+ }
+ }
+
+ private static String replaceConsts(Context context, String template) {
+ final Pattern pattern = Pattern.compile("<%@\\s*(\\w+/\\w+)\\s*%>");
+ final Resources res = context.getResources();
+ final String packageName = R.class.getPackage().getName();
+ Matcher m = pattern.matcher(template);
+ StringBuffer sb = new StringBuffer();
+ while (m.find()) {
+ String name = m.group(1);
+ if (name.startsWith("drawable/")) {
+ m.appendReplacement(sb, "res/" + name);
+ } else {
+ int id = res.getIdentifier(name, null, packageName);
+ if (id != 0) {
+ TypedValue value = new TypedValue();
+ res.getValue(id, value, true);
+ String replacement;
+ if (value.type == TypedValue.TYPE_DIMENSION) {
+ float dimen = res.getDimension(id);
+ int dimeni = (int) dimen;
+ if (dimeni == dimen)
+ replacement = Integer.toString(dimeni);
+ else
+ replacement = Float.toString(dimen);
+ } else {
+ replacement = value.coerceToString().toString();
+ }
+ m.appendReplacement(sb, replacement);
+ }
+ }
+ }
+ m.appendTail(sb);
+ return sb.toString();
+ }
+
+ private static String readRaw(Context context, int id) {
+ InputStream ins = context.getResources().openRawResource(id);
+ try {
+ byte[] buf = new byte[ins.available()];
+ ins.read(buf);
+ return new String(buf, "utf-8");
+ } catch (IOException ex) {
+ return "<html><body>Error</body></html>";
+ }
+ }
+
+}
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