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LibWeb: Parse <script> elements and run any JavaScript found inside

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This patch begins integrating LibJS into LibWeb. Document holds the
JS::Interpreter for now, and it is created on demand when you first
call Document::interpreter().

We also add a simple "alert()" function to the global object.
This commit is contained in:
Andreas Kling 2020-03-14 12:41:51 +01:00
parent f94099f796
commit 9c9d3f0904
11 changed files with 142 additions and 3 deletions
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60
Libraries/LibWeb/DOM/HTMLScriptElement.cpp Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/StringBuilder.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/HTMLScriptElement.h>
#include <LibWeb/DOM/Text.h>
namespace Web {
HTMLScriptElement::HTMLScriptElement(Document& document, const String& tag_name)
: HTMLElement(document, tag_name)
{
}
HTMLScriptElement::~HTMLScriptElement()
{
}
void HTMLScriptElement::inserted_into(Node& new_parent)
{
HTMLElement::inserted_into(new_parent);
StringBuilder builder;
for_each_child([&](auto& child) {
if (is<Text>(child))
builder.append(to<Text>(child).text_content());
});
auto source = builder.to_string();
auto program = JS::Parser(JS::Lexer(source)).parse_program();
document().interpreter().run(*program);
}
}