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/*
* Copyright (C) 2018 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.
*/
#include "java_lang_builder.h"
#include "android-base/stringprintf.h"
using android::base::StringPrintf;
using std::string;
void JavaLangViewBuilder::Start() const {
out_ << StringPrintf("package %s;\n", package_.c_str())
<< "import android.content.Context;\n"
"import android.content.res.Resources;\n"
"import android.content.res.XmlResourceParser;\n"
"import android.util.AttributeSet;\n"
"import android.util.Xml;\n"
"import android.view.*;\n"
"import android.widget.*;\n"
"\n"
"public final class CompiledView {\n"
"\n"
"static <T extends View> T createView(Context context, AttributeSet attrs, View parent, "
"String name, LayoutInflater.Factory factory, LayoutInflater.Factory2 factory2) {"
"\n"
" if (factory2 != null) {\n"
" return (T)factory2.onCreateView(parent, name, context, attrs);\n"
" } else if (factory != null) {\n"
" return (T)factory.onCreateView(name, context, attrs);\n"
" }\n"
// TODO: find a way to call the private factory
" return null;\n"
"}\n"
"\n"
" public static View inflate(Context context) {\n"
" try {\n"
" LayoutInflater inflater = LayoutInflater.from(context);\n"
" LayoutInflater.Factory factory = inflater.getFactory();\n"
" LayoutInflater.Factory2 factory2 = inflater.getFactory2();\n"
" Resources res = context.getResources();\n"
<< StringPrintf(" XmlResourceParser xml = res.getLayout(%s.R.layout.%s);\n",
package_.c_str(),
layout_name_.c_str())
<< " AttributeSet attrs = Xml.asAttributeSet(xml);\n"
// The Java-language XmlPullParser needs a call to next to find the start document tag.
" xml.next(); // start document\n";
}
void JavaLangViewBuilder::Finish() const {
out_ << " } catch (Exception e) {\n"
" return null;\n"
" }\n" // end try
" }\n" // end inflate
"}\n"; // end CompiledView
}
void JavaLangViewBuilder::StartView(const string& class_name) {
const string view_var = MakeVar("view");
const string layout_var = MakeVar("layout");
std::string parent = "null";
if (!view_stack_.empty()) {
const StackEntry& parent_entry = view_stack_.back();
parent = parent_entry.view_var;
}
out_ << " xml.next(); // <" << class_name << ">\n"
<< StringPrintf(" %s %s = createView(context, attrs, %s, \"%s\", factory, factory2);\n",
class_name.c_str(),
view_var.c_str(),
parent.c_str(),
class_name.c_str())
<< StringPrintf(" if (%s == null) %s = new %s(context, attrs);\n",
view_var.c_str(),
view_var.c_str(),
class_name.c_str());
if (!view_stack_.empty()) {
out_ << StringPrintf(" ViewGroup.LayoutParams %s = %s.generateLayoutParams(attrs);\n",
layout_var.c_str(),
parent.c_str());
}
view_stack_.push_back({class_name, view_var, layout_var});
}
void JavaLangViewBuilder::FinishView() {
const StackEntry var = view_stack_.back();
view_stack_.pop_back();
if (!view_stack_.empty()) {
const string& parent = view_stack_.back().view_var;
out_ << StringPrintf(" xml.next(); // </%s>\n", var.class_name.c_str())
<< StringPrintf(" %s.addView(%s, %s);\n",
parent.c_str(),
var.view_var.c_str(),
var.layout_params_var.c_str());
} else {
out_ << StringPrintf(" return %s;\n", var.view_var.c_str());
}
}
const std::string JavaLangViewBuilder::MakeVar(std::string prefix) {
std::stringstream v;
v << prefix << view_id_++;
return v.str();
}
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