LibGUI+PDFViewer: Move NumericInput into LibGUI

A text box that is restricted to numbers within a range, is generally
useful. Let's make it available for use!

Base/usr/share/man/man5/GML/Widget/NumericInput.md

@@ -0,0 +1,19 @@
+## Name
+
+GML Numeric Input Widget
+
+## Description
+
+Defines a GUI text box that only allows integers within a specified range.
+
+## Synopsis
+
+`@GUI::NumericInput`
+
+## Examples
+
+```gml
+@GUI::NumericInput {
+    text: "23"
+}
+```

Userland/Applications/PDFViewer/CMakeLists.txt

@@ -4,7 +4,6 @@ serenity_component(
 )
 
 set(SOURCES
-    NumericInput.cpp
     OutlineModel.cpp
     PDFViewer.cpp
     PDFViewerWidget.cpp

Userland/Applications/PDFViewer/PDFViewerWidget.cpp

@@ -276,7 +276,7 @@ void PDFViewerWidget::initialize_toolbar(GUI::Toolbar& toolbar)
     toolbar.add_action(*m_go_to_prev_page_action);
     toolbar.add_action(*m_go_to_next_page_action);
 
-    m_page_text_box = toolbar.add<NumericInput>();
+    m_page_text_box = toolbar.add<GUI::NumericInput>();
     m_page_text_box->set_enabled(false);
     m_page_text_box->set_fixed_width(30);
     m_page_text_box->set_min_number(1);

Userland/Applications/PDFViewer/PDFViewerWidget.h

@@ -6,7 +6,6 @@
 
 #pragma once
 
-#include "NumericInput.h"
 #include "PDFViewer.h"
 #include "SidebarWidget.h"
 #include <AK/NonnullRefPtr.h>
@@ -14,6 +13,7 @@
 #include <LibGUI/Action.h>
 #include <LibGUI/ActionGroup.h>
 #include <LibGUI/CheckBox.h>
+#include <LibGUI/NumericInput.h>
 #include <LibGUI/Widget.h>
 
 class PDFViewer;
@@ -40,7 +40,7 @@ private:
     RefPtr<SidebarWidget> m_sidebar;
     NonnullRefPtr<PagedErrorsModel> m_paged_errors_model;
     RefPtr<GUI::TreeView> m_errors_tree_view;
-    RefPtr<NumericInput> m_page_text_box;
+    RefPtr<GUI::NumericInput> m_page_text_box;
     RefPtr<GUI::Label> m_total_page_label;
     RefPtr<GUI::Action> m_go_to_prev_page_action;
     RefPtr<GUI::Action> m_go_to_next_page_action;

Userland/Libraries/LibGUI/CMakeLists.txt

@@ -86,6 +86,7 @@ set(SOURCES
     MouseTracker.cpp
     MultiView.cpp
     Notification.cpp
+    NumericInput.cpp
     Object.cpp
     OpacitySlider.cpp
     Painter.cpp

Userland/Libraries/LibGUI/NumericInput.cpp

@@ -7,6 +7,8 @@
 #include "NumericInput.h"
 #include <ctype.h>
 
+namespace GUI {
+
 NumericInput::NumericInput()
 {
     set_text("0"sv);
@@ -87,3 +89,5 @@ void NumericInput::set_current_number(i32 number, GUI::AllowCallback allow_callb
     if (on_number_changed && allow_callback == GUI::AllowCallback::Yes)
         on_number_changed(m_current_number);
 }
+
+}

Userland/Libraries/LibGUI/NumericInput.h

@@ -9,6 +9,8 @@
 #include <AK/NumericLimits.h>
 #include <LibGUI/TextBox.h>
 
+namespace GUI {
+
 class NumericInput final : public GUI::TextBox {
     C_OBJECT(NumericInput)
 public:
@@ -29,3 +31,5 @@ private:
     i32 m_min_number { NumericLimits<i32>::min() };
     i32 m_max_number { NumericLimits<i32>::max() };
 };
+
+}