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https://github.com/RGBCube/serenity
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HexEditor: Initial application release
The very first release of the Hex Editor for Serenity.
This commit is contained in:
Brandon Scott
Andreas Kling
parent
efc2fc6888
commit
48ef1d1bd1
10 changed files with 828 additions and 0 deletions
488
Applications/HexEditor/HexEditor.cpp
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488
Applications/HexEditor/HexEditor.cpp
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#include "HexEditor.h"
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#include <AK/StringBuilder.h>
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#include <Kernel/KeyCode.h>
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#include <LibGUI/GAction.h>
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#include <LibGUI/GClipboard.h>
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#include <LibGUI/GFontDatabase.h>
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#include <LibGUI/GMenu.h>
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#include <LibGUI/GPainter.h>
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#include <LibGUI/GScrollBar.h>
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#include <LibGUI/GTextEditor.h>
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#include <LibGUI/GWindow.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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HexEditor::HexEditor(GWidget* parent)
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: GScrollableWidget(parent)
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{
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set_frame_shape(FrameShape::Container);
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set_frame_shadow(FrameShadow::Sunken);
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set_frame_thickness(2);
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set_scrollbars_enabled(true);
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set_font(GFontDatabase::the().get_by_name("Csilla Thin"));
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vertical_scrollbar().set_step(line_height());
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}
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HexEditor::~HexEditor()
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{
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}
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void HexEditor::set_readonly(bool readonly)
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{
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if (m_readonly == readonly)
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return;
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m_readonly = readonly;
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}
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void HexEditor::set_buffer(const ByteBuffer& buffer)
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{
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m_buffer = buffer;
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set_content_length(buffer.size());
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update();
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update_status();
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}
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void HexEditor::set_position(int position)
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{
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if (position > m_buffer.size())
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return;
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m_position = position;
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scroll_position_into_view(position);
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update_status();
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}
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bool HexEditor::write_to_file(const StringView& path)
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{
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if (m_buffer.is_empty())
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return true;
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int fd = open_with_path_length(path.characters_without_null_termination(), path.length(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
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if (fd < 0) {
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perror("open");
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return false;
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}
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int rc = ftruncate(fd, m_buffer.size());
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if (rc < 0) {
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perror("ftruncate");
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return false;
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}
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ssize_t nwritten = write(fd, m_buffer.data(), m_buffer.size());
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if (nwritten < 0) {
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perror("write");
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close(fd);
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return false;
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}
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if (nwritten == m_buffer.size()) {
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m_tracked_changes.clear();
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update();
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}
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close(fd);
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return true;
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}
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bool HexEditor::copy_selected_hex_to_clipboard()
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{
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if(m_selection_start == -1 || m_selection_end == -1 || (m_selection_end - m_selection_start) < 0 || m_buffer.is_empty())
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return false;
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StringBuilder output_string_builder;
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for(int i = m_selection_start; i < m_selection_end; i++)
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{
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output_string_builder.appendf("%02X ", m_buffer.data()[i]);
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}
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GClipboard::the().set_data(output_string_builder.to_string());
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return true;
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}
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bool HexEditor::copy_selected_text_to_clipboard()
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{
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if(m_selection_start == -1 || m_selection_end == -1 || (m_selection_end - m_selection_start) < 0)
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return false;
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StringBuilder output_string_builder;
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for(int i = m_selection_start; i < m_selection_end; i++)
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{
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output_string_builder.appendf("%c", isprint(m_buffer.data()[i]) ? m_buffer[i] : '.');
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}
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GClipboard::the().set_data(output_string_builder.to_string());
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return true;
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}
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void HexEditor::set_bytes_per_row(int bytes_per_row)
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{
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m_bytes_per_row = bytes_per_row;
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set_content_size({ offset_margin_width() + (m_bytes_per_row * (character_width() * 3)) + 10 + (m_bytes_per_row * character_width()) + 20, total_rows() * line_height() + 10 });
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update();
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}
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void HexEditor::set_content_length(int length)
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{
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if (length == m_content_length)
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return;
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m_content_length = length;
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set_content_size({ offset_margin_width() + (m_bytes_per_row * (character_width() * 3)) + 10 + (m_bytes_per_row * character_width()) + 20, total_rows() * line_height() + 10 });
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}
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void HexEditor::mousedown_event(GMouseEvent& event)
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{
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if (event.button() != GMouseButton::Left) {
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return;
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}
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auto absolute_x = horizontal_scrollbar().value() + event.x();
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auto absolute_y = vertical_scrollbar().value() + event.y();
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auto hex_start_x = frame_thickness() + 90;
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auto hex_start_y = frame_thickness() + 5;
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auto hex_end_x = hex_start_x + (bytes_per_row() * (character_width() * 3));
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auto hex_end_y = hex_start_y + 5 + (total_rows() * line_height());
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auto text_start_x = frame_thickness() + 100 + (bytes_per_row() * (character_width() * 3));
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auto text_start_y = frame_thickness() + 5;
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auto text_end_x = text_start_x + (bytes_per_row() * character_width());
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auto text_end_y = text_start_y + 5 + (total_rows() * line_height());
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if (absolute_x >= hex_start_x && absolute_x <= hex_end_x && absolute_y >= hex_start_y && absolute_y <= hex_end_y) {
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auto byte_x = (absolute_x - hex_start_x) / (character_width() * 3);
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auto byte_y = (absolute_y - hex_start_y) / line_height();
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auto offset = (byte_y * m_bytes_per_row) + byte_x;
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if (offset < 0 || offset > m_buffer.size())
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return;
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#ifdef HEX_DEBUG
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printf("HexEditor::mousedown_event(hex): offset=%d\n", offset);
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#endif
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m_edit_mode = EditMode::Hex;
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m_byte_position = 0;
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m_position = offset;
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m_in_drag_select = true;
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m_selection_start = offset;
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m_selection_end = -1;
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update();
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update_status();
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}
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if (absolute_x >= text_start_x && absolute_x <= text_end_x && absolute_y >= text_start_y && absolute_y <= text_end_y) {
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auto byte_x = (absolute_x - text_start_x) / character_width();
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auto byte_y = (absolute_y - text_start_y) / line_height();
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auto offset = (byte_y * m_bytes_per_row) + byte_x;
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if (offset < 0 || offset > m_buffer.size())
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return;
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#ifdef HEX_DEBUG
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printf("HexEditor::mousedown_event(text): offset=%d\n", offset);
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#endif
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m_position = offset;
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m_byte_position = 0;
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m_in_drag_select = true;
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m_selection_start = offset;
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m_selection_end = -1;
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m_edit_mode = EditMode::Text;
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update();
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update_status();
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}
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}
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void HexEditor::mousemove_event(GMouseEvent& event)
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{
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auto absolute_x = horizontal_scrollbar().value() + event.x();
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auto absolute_y = vertical_scrollbar().value() + event.y();
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auto hex_start_x = frame_thickness() + 90;
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auto hex_start_y = frame_thickness() + 5;
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auto hex_end_x = hex_start_x + (bytes_per_row() * (character_width() * 3));
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auto hex_end_y = hex_start_y + 5 + (total_rows() * line_height());
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auto text_start_x = frame_thickness() + 100 + (bytes_per_row() * (character_width() * 3));
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auto text_start_y = frame_thickness() + 5;
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auto text_end_x = text_start_x + (bytes_per_row() * character_width());
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auto text_end_y = text_start_y + 5 + (total_rows() * line_height());
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window()->set_override_cursor(GStandardCursor::None);
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if ((absolute_x >= hex_start_x && absolute_x <= hex_end_x
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&& absolute_y >= hex_start_y && absolute_y <= hex_end_y)
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|| (absolute_x >= text_start_x && absolute_x <= text_end_x
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&& absolute_y >= text_start_y && absolute_y <= text_end_y)) {
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window()->set_override_cursor(GStandardCursor::IBeam);
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}
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if (m_in_drag_select) {
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if (absolute_x >= hex_start_x && absolute_x <= hex_end_x && absolute_y >= hex_start_y && absolute_y <= hex_end_y) {
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auto byte_x = (absolute_x - hex_start_x) / (character_width() * 3);
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auto byte_y = (absolute_y - hex_start_y) / line_height();
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auto offset = (byte_y * m_bytes_per_row) + byte_x;
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if (offset < 0 || offset > m_buffer.size())
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return;
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m_selection_end = offset;
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scroll_position_into_view(offset);
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}
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if (absolute_x >= text_start_x && absolute_x <= text_end_x && absolute_y >= text_start_y && absolute_y <= text_end_y) {
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auto byte_x = (absolute_x - text_start_x) / character_width();
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auto byte_y = (absolute_y - text_start_y) / line_height();
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auto offset = (byte_y * m_bytes_per_row) + byte_x;
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if (offset < 0 || offset > m_buffer.size())
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return;
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m_selection_end = offset;
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scroll_position_into_view(offset);
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}
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update_status();
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update();
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return;
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}
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}
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void HexEditor::mouseup_event(GMouseEvent& event)
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{
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if (event.button() == GMouseButton::Left) {
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if (m_in_drag_select) {
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if (m_selection_end == -1 || m_selection_start == m_selection_end || m_selection_start > m_selection_end) {
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m_selection_start = -1;
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m_selection_end = -1;
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}
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m_in_drag_select = false;
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}
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update();
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update_status();
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}
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}
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void HexEditor::scroll_position_into_view(int position)
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{
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int y = position / bytes_per_row();
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int x = position % bytes_per_row();
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Rect rect {
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frame_thickness() + offset_margin_width() + (x * (character_width() * 3)) + 10,
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frame_thickness() + 5 + (y * line_height()),
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(character_width() * 3),
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line_height() - m_line_spacing
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};
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scroll_into_view(rect, true, true);
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}
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void HexEditor::keydown_event(GKeyEvent& event)
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{
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#ifdef HEX_DEBUG
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printf("HexEditor::keydown_event key=%d\n", event.key());
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#endif
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if (event.key() == KeyCode::Key_Up) {
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if (m_position - bytes_per_row() >= 0) {
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m_position -= bytes_per_row();
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scroll_position_into_view(m_position);
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update();
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update_status();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Down) {
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if (m_position + bytes_per_row() < m_buffer.size()) {
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m_position += bytes_per_row();
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scroll_position_into_view(m_position);
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update();
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update_status();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Left) {
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if (m_position - 1 >= 0) {
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m_position--;
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scroll_position_into_view(m_position);
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update();
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update_status();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Right) {
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if (m_position + 1 < m_buffer.size()) {
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m_position++;
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scroll_position_into_view(m_position);
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update();
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update_status();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Backspace) {
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if (m_position > 0) {
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m_position--;
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scroll_position_into_view(m_position);
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update();
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update_status();
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}
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return;
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}
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if (!is_readonly() && !event.ctrl() && !event.alt() && !event.text().is_empty()) {
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if (m_edit_mode == EditMode::Hex) {
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hex_mode_keydown_event(event);
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} else {
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text_mode_keydown_event(event);
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}
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}
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}
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void HexEditor::hex_mode_keydown_event(GKeyEvent& event)
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{
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if ((event.key() >= KeyCode::Key_0 && event.key() <= KeyCode::Key_9) || (event.key() >= KeyCode::Key_A && event.key() <= KeyCode::Key_F)) {
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// yes, this is terrible... but it works.
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auto value = (event.key() >= KeyCode::Key_0 && event.key() <= KeyCode::Key_9)
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? event.key() - KeyCode::Key_0
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: (event.key() - KeyCode::Key_A) + 0xA;
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if (m_byte_position == 0) {
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m_tracked_changes.set(m_position, m_buffer.data()[m_position]);
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m_buffer.data()[m_position] = value << 4 | (m_buffer.data()[m_position] & 0xF); // shift new value left 4 bits, OR with existing last 4 bits
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m_byte_position++;
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} else {
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m_buffer.data()[m_position] = (m_buffer.data()[m_position] & 0xF0) | value; // save the first 4 bits, OR the new value in the last 4
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m_position++;
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m_byte_position = 0;
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}
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update();
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update_status();
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did_change();
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}
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}
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void HexEditor::text_mode_keydown_event(GKeyEvent& event)
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{
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m_tracked_changes.set(m_position, m_buffer.data()[m_position]);
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m_buffer.data()[m_position] = (u8)event.text().characters()[0]; // save the first 4 bits, OR the new value in the last 4
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m_position++;
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update();
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update_status();
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did_change();
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}
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void HexEditor::update_status()
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{
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if (on_status_change)
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on_status_change(m_position, m_edit_mode, m_selection_start, m_selection_end);
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}
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void HexEditor::did_change()
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{
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if (on_change)
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on_change();
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}
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void HexEditor::paint_event(GPaintEvent& event)
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{
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GFrame::paint_event(event);
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GPainter painter(*this);
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painter.add_clip_rect(widget_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.fill_rect(event.rect(), Color::White);
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if (m_buffer.is_empty())
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return;
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painter.translate(frame_thickness(), frame_thickness());
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painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
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Rect offset_clip_rect {
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0,
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vertical_scrollbar().value(),
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85,
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height() - height_occupied_by_horizontal_scrollbar() //(total_rows() * line_height()) + 5
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};
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painter.fill_rect(offset_clip_rect, Color::WarmGray);
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painter.draw_line(offset_clip_rect.top_right(), offset_clip_rect.bottom_right(), Color::DarkGray);
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auto margin_and_hex_width = offset_margin_width() + (m_bytes_per_row * (character_width() * 3)) + 15;
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painter.draw_line({ margin_and_hex_width, 0 },
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{ margin_and_hex_width, vertical_scrollbar().value() + (height() - height_occupied_by_horizontal_scrollbar()) },
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Color::LightGray);
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auto view_height = (height() - height_occupied_by_horizontal_scrollbar());
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auto min_row = max(0, vertical_scrollbar().value() / line_height()); // if below 0 then use 0
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auto max_row = min(total_rows(), min_row + ceil_div(view_height, line_height())); // if above calculated rows, use calculated rows
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// paint offsets
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for (int i = min_row; i < max_row; i++) {
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Rect side_offset_rect {
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frame_thickness() + 5,
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frame_thickness() + 5 + (i * line_height()),
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width() - width_occupied_by_vertical_scrollbar(),
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height() - height_occupied_by_horizontal_scrollbar()
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};
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auto line = String::format("0x%08X", i * bytes_per_row());
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painter.draw_text(side_offset_rect, line);
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}
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for (int i = min_row; i < max_row; i++) {
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for (int j = 0; j < bytes_per_row(); j++) {
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auto byte_position = (i * bytes_per_row()) + j;
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if (byte_position >= m_buffer.size())
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return;
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Color text_color = Color::Black;
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if (m_tracked_changes.contains(byte_position)) {
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text_color = Color::Red;
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}
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Color highlight_color = Color::from_rgb(0x84351a);
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Rect hex_display_rect {
|
||||
frame_thickness() + offset_margin_width() + (j * (character_width() * 3)) + 10,
|
||||
frame_thickness() + 5 + (i * line_height()),
|
||||
(character_width() * 3),
|
||||
line_height() - m_line_spacing
|
||||
};
|
||||
if (byte_position >= m_selection_start && byte_position <= m_selection_end) {
|
||||
painter.fill_rect(hex_display_rect, highlight_color);
|
||||
text_color = text_color == Color::Red ? Color::from_rgb(0xFFC0CB) : Color::White;
|
||||
} else if (byte_position == m_position) {
|
||||
painter.fill_rect(hex_display_rect, Color::from_rgb(0xCCCCCC));
|
||||
}
|
||||
|
||||
auto line = String::format("%02X", m_buffer[byte_position]);
|
||||
painter.draw_text(hex_display_rect, line, TextAlignment::TopLeft, text_color);
|
||||
|
||||
Rect text_display_rect {
|
||||
frame_thickness() + offset_margin_width() + (bytes_per_row() * (character_width() * 3)) + (j * character_width()) + 20,
|
||||
frame_thickness() + 5 + (i * line_height()),
|
||||
character_width(),
|
||||
line_height() - m_line_spacing
|
||||
};
|
||||
// selection highlighting.
|
||||
if (byte_position >= m_selection_start && byte_position <= m_selection_end) {
|
||||
painter.fill_rect(text_display_rect, highlight_color);
|
||||
} else if (byte_position == m_position) {
|
||||
painter.fill_rect(text_display_rect, Color::from_rgb(0xCCCCCC));
|
||||
}
|
||||
|
||||
painter.draw_text(text_display_rect, String::format("%c", isprint(m_buffer[byte_position]) ? m_buffer[byte_position] : '.'), TextAlignment::TopLeft, text_color);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void HexEditor::leave_event(CEvent&)
|
||||
{
|
||||
ASSERT(window());
|
||||
window()->set_override_cursor(GStandardCursor::None);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue