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PDFViewer: Add a tab bar with outlines and thumbnails

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Outlines are in theory implemented (though I'm having trouble finding
a simple PDF with outlines to test it on), and thumbnails are not.
This commit is contained in:
Matthew Olsson 2021-05-23 21:34:06 -07:00 • committed by Ali Mohammad Pur
parent 67b65dffa8
commit cea7dbce42
7 changed files with 250 additions and 7 deletions
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105
Userland/Applications/PDFViewer/OutlineModel.cpp Normal file
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/*
* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "OutlineModel.h"
#include <LibGfx/FontDatabase.h>
NonnullRefPtr<OutlineModel> OutlineModel::create(const NonnullRefPtr<PDF::OutlineDict>& outline)
{
return adopt_ref(*new OutlineModel(outline));
}
OutlineModel::OutlineModel(const NonnullRefPtr<PDF::OutlineDict>& outline)
: m_outline(outline)
{
m_closed_item_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/book.png"));
m_open_item_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/book-open.png"));
}
void OutlineModel::set_index_open_state(const GUI::ModelIndex& index, bool is_open)
{
VERIFY(index.is_valid());
auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
if (is_open) {
m_open_outline_items.set(outline_item);
} else {
m_open_outline_items.remove(outline_item);
}
}
int OutlineModel::row_count(const GUI::ModelIndex& index) const
{
if (!index.is_valid())
return m_outline->children.size();
auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
return static_cast<int>(outline_item->children.size());
}
int OutlineModel::column_count(const GUI::ModelIndex&) const
{
return 1;
}
GUI::Variant OutlineModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
{
VERIFY(index.is_valid());
auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
switch (role) {
case GUI::ModelRole::Display:
return outline_item->title;
case GUI::ModelRole::Icon:
if (m_open_outline_items.contains(outline_item))
return m_open_item_icon;
return m_closed_item_icon;
default:
return {};
}
}
void OutlineModel::update()
{
did_update();
}
GUI::ModelIndex OutlineModel::parent_index(const GUI::ModelIndex& index) const
{
if (!index.is_valid())
return {};
auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
auto& parent = outline_item->parent;
if (!parent)
return {};
if (parent->parent) {
auto& grandparent = parent->parent;
for (size_t i = 0; i < grandparent->children.size(); i++) {
auto* sibling = &grandparent->children[i];
if (sibling == index.internal_data())
return create_index(static_cast<int>(i), 0, sibling);
}
} else {
for (size_t i = 0; i < m_outline->children.size(); i++) {
auto* sibling = &m_outline->children[i];
if (sibling == index.internal_data())
return create_index(static_cast<int>(i), 0, sibling);
}
}
VERIFY_NOT_REACHED();
}
GUI::ModelIndex OutlineModel::index(int row, int column, const GUI::ModelIndex& parent) const
{
if (!parent.is_valid())
return create_index(row, column, &m_outline->children[row]);
auto parent_outline_item = static_cast<PDF::OutlineItem*>(parent.internal_data());
return create_index(row, column, &parent_outline_item->children[row]);
}