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#include "common.hh"
#include "htmlutil.hh"
#include "tag.hh"
#include <map>
#include <vector>
namespace {
class TextRenderable : public virtual Renderable {
public:
explicit TextRenderable(std::string content)
: content_(std::move(content)) {}
void render(std::string* out) const override {
html::escape(content_, out);
}
private:
std::string content_;
};
class ScriptRenderable : public virtual Renderable {
public:
explicit ScriptRenderable(std::string content)
: content_(std::move(content)) {}
void render(std::string* out) const override {
out->append(content_);
}
private:
std::string content_;
};
class TagImpl : public Tag {
public:
TagImpl(std::string name, std::string content)
: name_(std::move(name)) {
add(std::move(content));
assert(html::escape(name_) == name_);
}
std::string_view name() const override {
return name_;
}
bool empty() const override {
return child_.empty();
}
bool has_attr(std::string const& name) const override {
return attr_.count(name);
}
Tag* clear_content() override {
child_.clear();
return this;
}
Tag* attr(std::string name, std::string value) override {
assert(html::escape(name) == name);
attr_[name] = std::move(value);
return this;
}
Tag* add(std::string content) override {
if (!content.empty()) {
if (name_ == "script") {
child_.push_back(
std::make_unique<ScriptRenderable>(std::move(content)));
} else {
child_.push_back(std::make_unique<TextRenderable>(std::move(content)));
}
}
return this;
}
Tag* add(std::unique_ptr<Tag> tag) override {
auto* ret = tag.get();
child_.push_back(std::move(tag));
return ret;
}
void render(std::string* out) const override {
size_t need = 1 + name_.size();
for (auto const& pair : attr_)
need += 1 + pair.first.size() + 2 + pair.second.size() + 1;
if (empty())
++need;
out->reserve(need);
out->push_back('<');
out->append(name_);
for (auto const& pair : attr_) {
out->push_back(' ');
out->append(pair.first);
out->append("=\"");
html::escape(pair.second, out, html::EscapeTarget::ATTRIBUTE);
out->push_back('"');
}
if (empty()) {
if (name_ == "script") {
// Some browsers don't allow <script src=""/>, must be written as
// <script src=""></script>
out->append("></script>");
} else {
// There are tags, like <br> where the / is optional but why botter.
out->append("/>");
}
return;
}
out->push_back('>');
for (auto& child : child_) {
child->render(out);
}
out->reserve(name_.size() + 3);
out->append("</");
out->append(name_);
out->push_back('>');
}
private:
std::string name_;
std::map<std::string, std::string> attr_;
std::vector<std::unique_ptr<Renderable>> child_;
};
} // namespace
Tag* Tag::add_tag(std::string name, std::string content) {
return add(create(std::move(name), std::move(content)));
}
std::unique_ptr<Tag> Tag::create(std::string name, std::string content) {
return std::make_unique<TagImpl>(std::move(name), std::move(content));
}
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