HexEditor: Add 'Go to Offset...' dialog

2025-07-26 12:37:45 +00:00 · 2021-05-23 08:36:30 +00:00 · 2021-05-23 08:36:30 +00:00 · efef77a154
commit efef77a154
parent dd6921bfc6
7 changed files with 276 additions and 22 deletions
--- a/Userland/Applications/HexEditor/GoToOffsetDialog.cpp
+++ b/Userland/Applications/HexEditor/GoToOffsetDialog.cpp
@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "GoToOffsetDialog.h"
+#include <AK/String.h>
+#include <Applications/HexEditor/GoToOffsetDialogGML.h>
+#include <LibGUI/BoxLayout.h>
+#include <LibGUI/Button.h>
+#include <LibGUI/ComboBox.h>
+#include <LibGUI/ItemListModel.h>
+#include <LibGUI/Label.h>
+#include <LibGUI/MessageBox.h>
+#include <LibGUI/Statusbar.h>
+#include <LibGUI/TextBox.h>
+#include <LibGUI/Widget.h>
+
+int GoToOffsetDialog::show(GUI::Window* parent_window, int& history_offset, int& out_offset, int selection_offset, int buffer_size)
+{
+    auto dialog = GoToOffsetDialog::construct();
+    dialog->m_selection_offset = selection_offset;
+    dialog->m_buffer_size = buffer_size;
+
+    if (parent_window)
+        dialog->set_icon(parent_window->icon());
+
+    if (history_offset)
+        dialog->m_text_editor->set_text(String::formatted("{}", history_offset));
+
+    auto result = dialog->exec();
+
+    if (result != GUI::Dialog::ExecOK)
+        return result;
+
+    auto input_offset = dialog->process_input();
+    history_offset = move(input_offset);
+
+    auto new_offset = dialog->calculate_new_offset(input_offset);
+    dbgln("Go to offset: value={}", new_offset);
+    out_offset = move(new_offset);
+
+    return GUI::Dialog::ExecOK;
+}
+
+int GoToOffsetDialog::process_input()
+{
+    auto input_offset = m_text_editor->text().trim_whitespace();
+    int offset;
+    auto type = m_offset_type_box->text().trim_whitespace();
+    if (type == "Decimal") {
+        offset = String::formatted("{}", input_offset).to_int().value_or(0);
+    } else if (type == "Hexadecimal") {
+        offset = strtol(String::formatted("{}", input_offset).characters(), nullptr, 16);
+    } else {
+        VERIFY_NOT_REACHED();
+    }
+    return offset;
+}
+
+int GoToOffsetDialog::calculate_new_offset(int input_offset)
+{
+    int new_offset;
+    auto from = m_offset_from_box->text().trim_whitespace();
+    if (from == "Start") {
+        new_offset = input_offset;
+    } else if (from == "End") {
+        new_offset = m_buffer_size - input_offset;
+    } else if (from == "Here") {
+        new_offset = input_offset + m_selection_offset;
+    } else {
+        VERIFY_NOT_REACHED();
+    }
+
+    if (new_offset > m_buffer_size)
+        new_offset = m_buffer_size;
+    if (new_offset < 0)
+        new_offset = 0;
+
+    return new_offset;
+}
+
+void GoToOffsetDialog::update_statusbar()
+{
+    auto new_offset = calculate_new_offset(process_input());
+    m_statusbar->set_text(0, String::formatted("HEX: {:#08X}", new_offset));
+    m_statusbar->set_text(1, String::formatted("DEC: {}", new_offset));
+}
+
+GoToOffsetDialog::GoToOffsetDialog()
+    : Dialog(nullptr)
+{
+    resize(300, 80);
+    center_on_screen();
+    set_resizable(false);
+    set_title("Go to Offset");
+
+    auto& main_widget = set_main_widget<GUI::Widget>();
+    if (!main_widget.load_from_gml(go_to_offset_dialog_gml))
+        VERIFY_NOT_REACHED();
+
+    m_text_editor = *main_widget.find_descendant_of_type_named<GUI::TextBox>("text_editor");
+    m_go_button = *main_widget.find_descendant_of_type_named<GUI::Button>("go_button");
+    m_offset_type_box = *main_widget.find_descendant_of_type_named<GUI::ComboBox>("offset_type");
+    m_offset_from_box = *main_widget.find_descendant_of_type_named<GUI::ComboBox>("offset_from");
+    m_statusbar = *main_widget.find_descendant_of_type_named<GUI::Statusbar>("statusbar");
+
+    m_offset_type.append("Decimal");
+    m_offset_type.append("Hexadecimal");
+    m_offset_type_box->set_model(GUI::ItemListModel<String>::create(m_offset_type));
+    m_offset_type_box->set_selected_index(0);
+    m_offset_type_box->set_only_allow_values_from_model(true);
+
+    m_offset_from.append("Start");
+    m_offset_from.append("Here");
+    m_offset_from.append("End");
+    m_offset_from_box->set_model(GUI::ItemListModel<String>::create(m_offset_from));
+    m_offset_from_box->set_selected_index(0);
+    m_offset_from_box->set_only_allow_values_from_model(true);
+
+    m_text_editor->on_return_pressed = [this] {
+        m_go_button->click();
+    };
+
+    m_go_button->on_click = [this](auto) {
+        done(ExecResult::ExecOK);
+    };
+
+    m_text_editor->on_change = [this]() {
+        auto text = m_text_editor->text();
+        if (text.starts_with("0x")) {
+            text.replace("0x", "");
+            m_offset_type_box->set_selected_index(1);
+            m_text_editor->set_text(text);
+        }
+        update_statusbar();
+    };
+
+    m_offset_type_box->on_change = [this]() {
+        update_statusbar();
+    };
+
+    m_offset_from_box->on_change = [this]() {
+        update_statusbar();
+    };
+
+    update_statusbar();
+}
+
+GoToOffsetDialog::~GoToOffsetDialog()
+{
+}