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7c2cd81edb
When we write the format specifier '{:#08x}' we are asking for eight
significant digits, zero padding and the prefix '0x'.
However, previously we got only six significant digits because the
prefix counted towards the width. (The number '8' here is the total
width and not the number of significant digits.)
Both fmtlib and printf shared this behaviour. However, I am introducing
a special case here because when we do zero padding we really only care
about the digits and not the width.
Notice that zero padding is a special case anyways, because zero padding
goes after the prefix as opposed to any other padding which goes before
it.
245 lines
10 KiB
C++
245 lines
10 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "HexEditorWidget.h"
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#include <AK/Optional.h>
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#include <AK/StringBuilder.h>
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#include <LibCore/File.h>
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#include <LibGUI/AboutDialog.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/BoxLayout.h>
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#include <LibGUI/Button.h>
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#include <LibGUI/FilePicker.h>
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#include <LibGUI/FontDatabase.h>
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#include <LibGUI/InputBox.h>
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#include <LibGUI/Menu.h>
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#include <LibGUI/MenuBar.h>
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#include <LibGUI/MessageBox.h>
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#include <LibGUI/StatusBar.h>
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#include <LibGUI/TextBox.h>
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#include <LibGUI/TextEditor.h>
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#include <LibGUI/ToolBar.h>
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#include <stdio.h>
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#include <string.h>
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HexEditorWidget::HexEditorWidget()
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{
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set_fill_with_background_color(true);
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set_layout<GUI::VerticalBoxLayout>();
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layout()->set_spacing(2);
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m_editor = add<HexEditor>();
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m_editor->on_status_change = [this](int position, HexEditor::EditMode edit_mode, int selection_start, int selection_end) {
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m_statusbar->set_text(0, String::formatted("Offset: {:#08X}", position));
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m_statusbar->set_text(1, String::formatted("Edit Mode: {}", edit_mode == HexEditor::EditMode::Hex ? "Hex" : "Text"));
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m_statusbar->set_text(2, String::formatted("Selection Start: {}", selection_start));
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m_statusbar->set_text(3, String::formatted("Selection End: {}", selection_end));
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m_statusbar->set_text(4, String::formatted("Selected Bytes: {}", abs(selection_end - selection_start) + 1));
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};
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m_editor->on_change = [this] {
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bool was_dirty = m_document_dirty;
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m_document_dirty = true;
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if (!was_dirty)
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update_title();
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};
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m_statusbar = add<GUI::StatusBar>(5);
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m_new_action = GUI::Action::create("New", { Mod_Ctrl, Key_N }, Gfx::Bitmap::load_from_file("/res/icons/16x16/new.png"), [this](const GUI::Action&) {
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if (m_document_dirty) {
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if (GUI::MessageBox::show(window(), "Save Document First?", "Warning", GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OKCancel) != GUI::Dialog::ExecResult::ExecOK)
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return;
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m_save_action->activate();
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}
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String value;
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if (GUI::InputBox::show(value, window(), "Enter new file size:", "New file size") == GUI::InputBox::ExecOK && !value.is_empty()) {
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auto file_size = value.to_int();
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if (file_size.has_value() && file_size.value() > 0) {
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m_document_dirty = false;
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m_editor->set_buffer(ByteBuffer::create_zeroed(file_size.value()));
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set_path(LexicalPath());
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update_title();
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} else {
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GUI::MessageBox::show(window(), "Invalid file size entered.", "Error", GUI::MessageBox::Type::Error);
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}
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}
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});
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m_open_action = GUI::CommonActions::make_open_action([this](auto&) {
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Optional<String> open_path = GUI::FilePicker::get_open_filepath(window());
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if (!open_path.has_value())
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return;
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open_file(open_path.value());
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});
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m_save_action = GUI::Action::create("Save", { Mod_Ctrl, Key_S }, Gfx::Bitmap::load_from_file("/res/icons/16x16/save.png"), [&](const GUI::Action&) {
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if (!m_path.is_empty()) {
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if (!m_editor->write_to_file(m_path)) {
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GUI::MessageBox::show(window(), "Unable to save file.\n", "Error", GUI::MessageBox::Type::Error);
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} else {
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m_document_dirty = false;
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update_title();
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}
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return;
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}
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m_save_as_action->activate();
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});
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m_save_as_action = GUI::Action::create("Save as...", { Mod_Ctrl | Mod_Shift, Key_S }, Gfx::Bitmap::load_from_file("/res/icons/16x16/save.png"), [this](const GUI::Action&) {
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Optional<String> save_path = GUI::FilePicker::get_save_filepath(window(), m_name.is_null() ? "Untitled" : m_name, m_extension.is_null() ? "bin" : m_extension);
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if (!save_path.has_value())
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return;
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if (!m_editor->write_to_file(save_path.value())) {
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GUI::MessageBox::show(window(), "Unable to save file.\n", "Error", GUI::MessageBox::Type::Error);
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return;
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}
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m_document_dirty = false;
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set_path(LexicalPath(save_path.value()));
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dbgln("Wrote document to {}", save_path.value());
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});
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auto menubar = GUI::MenuBar::construct();
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auto& app_menu = menubar->add_menu("Hex Editor");
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app_menu.add_action(*m_new_action);
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app_menu.add_action(*m_open_action);
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app_menu.add_action(*m_save_action);
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app_menu.add_action(*m_save_as_action);
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app_menu.add_separator();
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app_menu.add_action(GUI::CommonActions::make_quit_action([this](auto&) {
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if (!request_close())
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return;
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GUI::Application::the()->quit();
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}));
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m_goto_decimal_offset_action = GUI::Action::create("Go To Offset (Decimal)...", { Mod_Ctrl | Mod_Shift, Key_G }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-forward.png"), [this](const GUI::Action&) {
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String value;
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if (GUI::InputBox::show(value, window(), "Enter Decimal offset:", "Go To") == GUI::InputBox::ExecOK && !value.is_empty()) {
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auto new_offset = value.to_int();
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if (new_offset.has_value())
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m_editor->set_position(new_offset.value());
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}
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});
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m_goto_hex_offset_action = GUI::Action::create("Go To Offset (Hex)...", { Mod_Ctrl, Key_G }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-forward.png"), [this](const GUI::Action&) {
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String value;
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if (GUI::InputBox::show(value, window(), "Enter Hex offset:", "Go To") == GUI::InputBox::ExecOK && !value.is_empty()) {
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auto new_offset = strtol(value.characters(), nullptr, 16);
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m_editor->set_position(new_offset);
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}
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});
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auto& edit_menu = menubar->add_menu("Edit");
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edit_menu.add_action(GUI::Action::create("Fill selection...", { Mod_Ctrl, Key_B }, [&](const GUI::Action&) {
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String value;
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if (GUI::InputBox::show(value, window(), "Fill byte (hex):", "Fill Selection") == GUI::InputBox::ExecOK && !value.is_empty()) {
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auto fill_byte = strtol(value.characters(), nullptr, 16);
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m_editor->fill_selection(fill_byte);
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}
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}));
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edit_menu.add_separator();
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edit_menu.add_action(*m_goto_decimal_offset_action);
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edit_menu.add_action(*m_goto_hex_offset_action);
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edit_menu.add_separator();
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edit_menu.add_action(GUI::Action::create("Copy Hex", { Mod_Ctrl, Key_C }, [&](const GUI::Action&) {
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m_editor->copy_selected_hex_to_clipboard();
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}));
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edit_menu.add_action(GUI::Action::create("Copy Text", { Mod_Ctrl | Mod_Shift, Key_C }, [&](const GUI::Action&) {
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m_editor->copy_selected_text_to_clipboard();
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}));
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edit_menu.add_separator();
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edit_menu.add_action(GUI::Action::create("Copy As C Code", { Mod_Alt | Mod_Shift, Key_C }, [&](const GUI::Action&) {
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m_editor->copy_selected_hex_to_clipboard_as_c_code();
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}));
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auto& view_menu = menubar->add_menu("View");
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auto& bytes_per_row_menu = view_menu.add_submenu("Bytes per row");
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for (int i = 8; i <= 32; i += 8) {
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bytes_per_row_menu.add_action(GUI::Action::create(String::number(i), [this, i](auto&) {
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m_editor->set_bytes_per_row(i);
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m_editor->update();
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}));
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}
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auto& help_menu = menubar->add_menu("Help");
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help_menu.add_action(GUI::Action::create("About", [&](auto&) {
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GUI::AboutDialog::show("Hex Editor", Gfx::Bitmap::load_from_file("/res/icons/32x32/app-hexeditor.png"), window());
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}));
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GUI::Application::the()->set_menubar(move(menubar));
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m_editor->set_focus(true);
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}
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HexEditorWidget::~HexEditorWidget()
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{
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}
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void HexEditorWidget::set_path(const LexicalPath& lexical_path)
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{
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m_path = lexical_path.string();
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m_name = lexical_path.title();
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m_extension = lexical_path.extension();
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update_title();
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}
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void HexEditorWidget::update_title()
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{
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StringBuilder builder;
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builder.append(m_path);
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if (m_document_dirty)
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builder.append(" (*)");
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builder.append(" - Hex Editor");
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window()->set_title(builder.to_string());
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}
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void HexEditorWidget::open_file(const String& path)
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{
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auto file = Core::File::construct(path);
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if (!file->open(Core::IODevice::ReadOnly)) {
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GUI::MessageBox::show(window(), String::formatted("Opening \"{}\" failed: {}", path, strerror(errno)), "Error", GUI::MessageBox::Type::Error);
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return;
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}
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m_document_dirty = false;
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m_editor->set_buffer(file->read_all()); // FIXME: On really huge files, this is never going to work. Should really create a framework to fetch data from the file on-demand.
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set_path(LexicalPath(path));
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}
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bool HexEditorWidget::request_close()
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{
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if (!m_document_dirty)
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return true;
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auto result = GUI::MessageBox::show(window(), "The file has been modified. Quit without saving?", "Quit without saving?", GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OKCancel);
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return result == GUI::MessageBox::ExecOK;
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}
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