116 lines
4.6 KiB
C++
116 lines
4.6 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "java_lang_builder.h"
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#include "android-base/stringprintf.h"
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using android::base::StringPrintf;
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using std::string;
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void JavaLangViewBuilder::Start() const {
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out_ << StringPrintf("package %s;\n", package_.c_str())
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<< "import android.content.Context;\n"
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"import android.content.res.Resources;\n"
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"import android.content.res.XmlResourceParser;\n"
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"import android.util.AttributeSet;\n"
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"import android.util.Xml;\n"
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"import android.view.*;\n"
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"import android.widget.*;\n"
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"\n"
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"public final class CompiledView {\n"
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"\n"
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"static <T extends View> T createView(Context context, AttributeSet attrs, View parent, "
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"String name, LayoutInflater.Factory factory, LayoutInflater.Factory2 factory2) {"
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"\n"
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" if (factory2 != null) {\n"
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" return (T)factory2.onCreateView(parent, name, context, attrs);\n"
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" } else if (factory != null) {\n"
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" return (T)factory.onCreateView(name, context, attrs);\n"
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" }\n"
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// TODO: find a way to call the private factory
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" return null;\n"
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"}\n"
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"\n"
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" public static View inflate(Context context) {\n"
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" try {\n"
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" LayoutInflater inflater = LayoutInflater.from(context);\n"
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" LayoutInflater.Factory factory = inflater.getFactory();\n"
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" LayoutInflater.Factory2 factory2 = inflater.getFactory2();\n"
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" Resources res = context.getResources();\n"
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<< StringPrintf(" XmlResourceParser xml = res.getLayout(%s.R.layout.%s);\n",
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package_.c_str(),
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layout_name_.c_str())
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<< " AttributeSet attrs = Xml.asAttributeSet(xml);\n"
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// The Java-language XmlPullParser needs a call to next to find the start document tag.
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" xml.next(); // start document\n";
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}
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void JavaLangViewBuilder::Finish() const {
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out_ << " } catch (Exception e) {\n"
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" return null;\n"
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" }\n" // end try
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" }\n" // end inflate
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"}\n"; // end CompiledView
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}
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void JavaLangViewBuilder::StartView(const string& class_name, bool /*is_viewgroup*/) {
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const string view_var = MakeVar("view");
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const string layout_var = MakeVar("layout");
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std::string parent = "null";
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if (!view_stack_.empty()) {
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const StackEntry& parent_entry = view_stack_.back();
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parent = parent_entry.view_var;
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}
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out_ << " xml.next(); // <" << class_name << ">\n"
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<< StringPrintf(" %s %s = createView(context, attrs, %s, \"%s\", factory, factory2);\n",
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class_name.c_str(),
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view_var.c_str(),
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parent.c_str(),
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class_name.c_str())
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<< StringPrintf(" if (%s == null) %s = new %s(context, attrs);\n",
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view_var.c_str(),
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view_var.c_str(),
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class_name.c_str());
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if (!view_stack_.empty()) {
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out_ << StringPrintf(" ViewGroup.LayoutParams %s = %s.generateLayoutParams(attrs);\n",
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layout_var.c_str(),
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parent.c_str());
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}
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view_stack_.push_back({class_name, view_var, layout_var});
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}
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void JavaLangViewBuilder::FinishView() {
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const StackEntry var = view_stack_.back();
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view_stack_.pop_back();
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if (!view_stack_.empty()) {
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const string& parent = view_stack_.back().view_var;
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out_ << StringPrintf(" xml.next(); // </%s>\n", var.class_name.c_str())
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<< StringPrintf(" %s.addView(%s, %s);\n",
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parent.c_str(),
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var.view_var.c_str(),
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var.layout_params_var.c_str());
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} else {
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out_ << StringPrintf(" return %s;\n", var.view_var.c_str());
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}
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}
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const std::string JavaLangViewBuilder::MakeVar(std::string prefix) {
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std::stringstream v;
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v << prefix << view_id_++;
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return v.str();
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}
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