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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 "Editor.h"
#include "EditorWrapper.h"
#include <AK/ByteBuffer.h>
#include <AK/FileSystemPath.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <LibGUI/Application.h>
#include <LibGUI/Painter.h>
#include <LibGUI/ScrollBar.h>
#include <LibGUI/Window.h>
#include <LibHTML/DOM/ElementFactory.h>
#include <LibHTML/DOM/HTMLHeadElement.h>
#include <LibHTML/DOM/Text.h>
#include <LibHTML/HtmlView.h>
#include <LibHTML/Parser/HTMLParser.h>
#include <LibMarkdown/MDDocument.h>
//#define EDITOR_DEBUG
Editor::Editor()
{
m_documentation_tooltip_window = GUI::Window::construct();
m_documentation_tooltip_window->set_rect(0, 0, 500, 400);
m_documentation_tooltip_window->set_window_type(GUI::WindowType::Tooltip);
m_documentation_html_view = m_documentation_tooltip_window->set_main_widget<Web::HtmlView>();
}
Editor::~Editor()
{
}
EditorWrapper& Editor::wrapper()
{
return static_cast<EditorWrapper&>(*parent());
}
const EditorWrapper& Editor::wrapper() const
{
return static_cast<const EditorWrapper&>(*parent());
}
void Editor::focusin_event(Core::Event& event)
{
wrapper().set_editor_has_focus({}, true);
if (on_focus)
on_focus();
GUI::TextEditor::focusin_event(event);
}
void Editor::focusout_event(Core::Event& event)
{
wrapper().set_editor_has_focus({}, false);
GUI::TextEditor::focusout_event(event);
}
void Editor::paint_event(GUI::PaintEvent& event)
{
GUI::TextEditor::paint_event(event);
if (is_focused()) {
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
auto rect = frame_inner_rect();
if (vertical_scrollbar().is_visible())
rect.set_width(rect.width() - vertical_scrollbar().width());
if (horizontal_scrollbar().is_visible())
rect.set_height(rect.height() - horizontal_scrollbar().height());
painter.draw_rect(rect, palette().selection());
}
}
static HashMap<String, String>& man_paths()
{
static HashMap<String, String> paths;
if (paths.is_empty()) {
// FIXME: This should also search man3, possibly other places..
Core::DirIterator it("/usr/share/man/man2", Core::DirIterator::Flags::SkipDots);
while (it.has_next()) {
auto path = String::format("/usr/share/man/man2/%s", it.next_path().characters());
auto title = FileSystemPath(path).title();
paths.set(title, path);
}
}
return paths;
}
void Editor::show_documentation_tooltip_if_available(const String& hovered_token, const Gfx::Point& screen_location)
{
auto it = man_paths().find(hovered_token);
if (it == man_paths().end()) {
#ifdef EDITOR_DEBUG
dbg() << "no man path for " << hovered_token;
#endif
m_documentation_tooltip_window->hide();
return;
}
if (m_documentation_tooltip_window->is_visible() && hovered_token == m_last_parsed_token) {
return;
}
#ifdef EDITOR_DEBUG
dbg() << "opening " << it->value;
#endif
auto file = Core::File::construct(it->value);
if (!file->open(Core::File::ReadOnly)) {
dbg() << "failed to open " << it->value << " " << file->error_string();
return;
}
MDDocument man_document;
bool success = man_document.parse(file->read_all());
if (!success) {
dbg() << "failed to parse markdown";
return;
}
auto html_text = man_document.render_to_html();
auto html_document = Web::parse_html_document(html_text);
if (!html_document) {
dbg() << "failed to parse HTML";
return;
}
// FIXME: LibHTML needs a friendlier DOM manipulation API. Something like innerHTML :^)
auto style_element = create_element(*html_document, "style");
style_element->append_child(adopt(*new Web::Text(*html_document, "body { background-color: #dac7b5; }")));
// FIXME: This const_cast should not be necessary.
auto* head_element = const_cast<Web::HTMLHeadElement*>(html_document->head());
ASSERT(head_element);
head_element->append_child(style_element);
m_documentation_html_view->set_document(html_document);
m_documentation_tooltip_window->move_to(screen_location.translated(4, 4));
m_documentation_tooltip_window->show();
m_last_parsed_token = hovered_token;
}
void Editor::mousemove_event(GUI::MouseEvent& event)
{
GUI::TextEditor::mousemove_event(event);
if (document().spans().is_empty())
return;
auto text_position = text_position_at(event.position());
if (!text_position.is_valid()) {
GUI::Application::the().hide_tooltip();
return;
}
for (auto& span : document().spans()) {
if (span.range.contains(text_position)) {
auto adjusted_range = span.range;
adjusted_range.end().set_column(adjusted_range.end().column() + 1);
auto hovered_span_text = document().text_in_range(adjusted_range);
#ifdef EDITOR_DEBUG
dbg() << "Hovering: " << adjusted_range << " \"" << hovered_span_text << "\"";
#endif
show_documentation_tooltip_if_available(hovered_span_text, event.position().translated(screen_relative_rect().location()));
return;
}
}
GUI::Application::the().hide_tooltip();
}
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