Make ADT use the new layoutlib API.

ADT now exclusively use the new API.
The older platforms that still use the old API are
accessed through a compatibility layer provided by the class
LayoutBridgeWrapper that converts the old to the new API (both
input and output).

The wrapper and the loading code for the bridge have moved
to layoutlib_utils, but into the ide.common package.
Layoutlib_utils is to be renamed ide-common later.

.sdk.LoadStatus has moved into .ide.common too since
it's used by the bridge loading code. As we'll move
more code into ide-common it's ok to have it there anyway.

Also did some minor fix to the API:
- missing implementation of ViewInfo
- Made a singleton for SUCCESS state of SceneResult.

Change-Id: I5e7130ca03b92ad71dc9c293b2ffc40566df645c

1 files changed, 227 insertions, 0 deletions

diff --git a/layoutlib_utils/src/com/android/ide/common/layoutlib/ValueResourceParser.java b/layoutlib_utils/src/com/android/ide/common/layoutlib/ValueResourceParser.java
new file mode 100644
index 0000000..c784f1f
--- /dev/null
+++ b/layoutlib_utils/src/com/android/ide/common/layoutlib/ValueResourceParser.java
@@ -0,0 +1,227 @@
+/*
+ * Copyright (C) 2008 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.ide.common.layoutlib;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+
+/**
+ * SAX handler to parser value resource files.
+ */
+public final class ValueResourceParser extends DefaultHandler {
+
+    // TODO: reuse definitions from somewhere else.
+    private final static String NODE_RESOURCES = "resources";
+    private final static String NODE_ITEM = "item";
+    private final static String ATTR_NAME = "name";
+    private final static String ATTR_TYPE = "type";
+    private final static String ATTR_PARENT = "parent";
+    
+    // Resource type definition
+    private final static String RES_STYLE = "style";
+    private final static String RES_ATTR = "attr";
+    
+    private final static String DEFAULT_NS_PREFIX = "android:";
+    private final static int DEFAULT_NS_PREFIX_LEN = DEFAULT_NS_PREFIX.length();
+    
+    public interface IValueResourceRepository {
+        void addResourceValue(String resType, ResourceValue value);
+    }
+    
+    private boolean inResources = false;
+    private int mDepth = 0;
+    private StyleResourceValue mCurrentStyle = null;
+    private ResourceValue mCurrentValue = null;
+    private IValueResourceRepository mRepository;
+    private final boolean mIsFramework;
+    
+    public ValueResourceParser(IValueResourceRepository repository, boolean isFramework) {
+        mRepository = repository;
+        mIsFramework = isFramework;
+    }
+
+    @Override
+    public void endElement(String uri, String localName, String qName) throws SAXException {
+        if (mCurrentValue != null) {
+            mCurrentValue.setValue(trimXmlWhitespaces(mCurrentValue.getValue()));
+        }
+        
+        if (inResources && qName.equals(NODE_RESOURCES)) {
+            inResources = false;
+        } else if (mDepth == 2) {
+            mCurrentValue = null;
+            mCurrentStyle = null;
+        } else if (mDepth == 3) {
+            mCurrentValue = null;
+        }
+        
+        mDepth--;
+        super.endElement(uri, localName, qName);
+    }
+
+    @Override
+    public void startElement(String uri, String localName, String qName, Attributes attributes)
+            throws SAXException {
+        try {
+            mDepth++;
+            if (inResources == false && mDepth == 1) {
+                if (qName.equals(NODE_RESOURCES)) {
+                    inResources = true;
+                }
+            } else if (mDepth == 2 && inResources == true) {
+                String type;
+                
+                // if the node is <item>, we get the type from the attribute "type"
+                if (NODE_ITEM.equals(qName)) {
+                    type = attributes.getValue(ATTR_TYPE);
+                } else {
+                    // the type is the name of the node.
+                    type = qName;
+                }
+
+                if (type != null) {
+                    if (RES_ATTR.equals(type) == false) {
+                        // get the resource name
+                        String name = attributes.getValue(ATTR_NAME);
+                        if (name != null) {
+                            if (RES_STYLE.equals(type)) {
+                                String parent = attributes.getValue(ATTR_PARENT);
+                                mCurrentStyle = new StyleResourceValue(type, name, parent, mIsFramework);
+                                mRepository.addResourceValue(type, mCurrentStyle);
+                            } else {
+                                mCurrentValue = new ResourceValue(type, name, mIsFramework);
+                                mRepository.addResourceValue(type, mCurrentValue);
+                            }
+                        }
+                    }
+                }
+            } else if (mDepth == 3 && mCurrentStyle != null) {
+                // get the resource name
+                String name = attributes.getValue(ATTR_NAME);
+                if (name != null) {
+                    // the name can, in some cases, contain a prefix! we remove it.
+                    if (name.startsWith(DEFAULT_NS_PREFIX)) {
+                        name = name.substring(DEFAULT_NS_PREFIX_LEN);
+                    }
+    
+                    mCurrentValue = new ResourceValue(null, name, mIsFramework);
+                    mCurrentStyle.addItem(mCurrentValue);
+                }
+            }
+        } finally {
+            super.startElement(uri, localName, qName, attributes);
+        }
+    }
+    
+    @Override
+    public void characters(char[] ch, int start, int length) throws SAXException {
+        if (mCurrentValue != null) {
+            String value = mCurrentValue.getValue();
+            if (value == null) {
+                mCurrentValue.setValue(new String(ch, start, length));
+            } else {
+                mCurrentValue.setValue(value + new String(ch, start, length));
+            }
+        }
+    }
+    
+    public static String trimXmlWhitespaces(String value) {
+        if (value == null) {
+            return null;
+        }
+
+        // look for carriage return and replace all whitespace around it by just 1 space.
+        int index;
+        
+        while ((index = value.indexOf('\n')) != -1) {
+            // look for whitespace on each side
+            int left = index - 1;
+            while (left >= 0) {
+                if (Character.isWhitespace(value.charAt(left))) {
+                    left--;
+                } else {
+                    break;
+                }
+            }
+            
+            int right = index + 1;
+            int count = value.length();
+            while (right < count) {
+                if (Character.isWhitespace(value.charAt(right))) {
+                    right++;
+                } else {
+                    break;
+                }
+            }
+            
+            // remove all between left and right (non inclusive) and replace by a single space.
+            String leftString = null;
+            if (left >= 0) {
+                leftString = value.substring(0, left + 1);
+            }
+            String rightString = null;
+            if (right < count) {
+                rightString = value.substring(right);
+            }
+            
+            if (leftString != null) {
+                value = leftString;
+                if (rightString != null) {
+                    value += " " + rightString;
+                }
+            } else {
+                value = rightString != null ? rightString : "";
+            }
+        }
+        
+        // now we un-escape the string
+        int length = value.length();
+        char[] buffer = value.toCharArray();
+        
+        for (int i = 0 ; i < length ; i++) {
+            if (buffer[i] == '\\' && i + 1 < length) {
+                if (buffer[i+1] == 'u') {
+                    if (i + 5 < length) {
+                        // this is unicode char \u1234
+                        int unicodeChar = Integer.parseInt(new String(buffer, i+2, 4), 16);
+                        
+                        // put the unicode char at the location of the \
+                        buffer[i] = (char)unicodeChar;
+    
+                        // offset the rest of the buffer since we go from 6 to 1 char
+                        if (i + 6 < buffer.length) {
+                            System.arraycopy(buffer, i+6, buffer, i+1, length - i - 6);
+                        }
+                        length -= 5;
+                    }
+                } else {
+                    if (buffer[i+1] == 'n') {
+                        // replace the 'n' char with \n
+                        buffer[i+1] = '\n';
+                    }
+                    
+                    // offset the buffer to erase the \
+                    System.arraycopy(buffer, i+1, buffer, i, length - i - 1);
+                    length--;
+                }
+            }
+        }
+        
+        return new String(buffer, 0, length);
+    }
+}