Move LibGUI/GStyle to SharedGraphics/StylePainter.

I want to paint some buttons in WindowServer where we don't have LibGUI.

2 files changed, 123 insertions, 0 deletions

diff --git a/SharedGraphics/StylePainter.cpp b/SharedGraphics/StylePainter.cpp
new file mode 100644
index 0000000000..9d37a9de75
--- /dev/null
+++ b/SharedGraphics/StylePainter.cpp
@@ -0,0 +1,106 @@
+#include <SharedGraphics/StylePainter.h>
+#include <LibGUI/GPainter.h>
+
+static StylePainter* s_the;
+
+StylePainter& StylePainter::the()
+{
+    if (!s_the)
+        s_the = new StylePainter;
+    return *s_the;
+}
+
+StylePainter::StylePainter()
+{
+}
+
+static void paint_button_new(Painter& painter, const Rect& rect, bool pressed)
+{
+    Color button_color = Color::from_rgb(0xc0c0c0);
+    Color highlight_color1 = Color::from_rgb(0xffffff);
+    Color highlight_color2 = Color::from_rgb(0xdfdfdf);
+    Color shadow_color1 = Color::from_rgb(0x808080);
+    Color shadow_color2 = Color::from_rgb(0x404040);
+
+    PainterStateSaver saver(painter);
+    painter.translate(rect.location());
+
+    if (pressed) {
+        // Base
+        painter.fill_rect({ 1, 1, rect.width() - 2, rect.height() - 2 }, button_color);
+
+        painter.draw_rect(rect, shadow_color2);
+
+        // Sunken shadow
+        painter.draw_line({ 1, 1 }, { rect.width() - 2, 1 }, shadow_color1);
+        painter.draw_line({ 1, 2 }, {1, rect.height() - 2 }, shadow_color1);
+    } else {
+        // Base
+        painter.fill_rect({ 2, 2, rect.width() - 4, rect.height() - 4 }, button_color);
+
+        // Outer highlight
+        painter.draw_line({ 0, 0 }, { rect.width() - 2, 0 }, highlight_color2);
+        painter.draw_line({ 0, 1 }, { 0, rect.height() - 2 }, highlight_color2);
+
+        // Inner highlight
+        painter.draw_line({ 1, 1 }, { rect.width() - 3, 1 }, highlight_color1);
+        painter.draw_line({ 1, 2 }, { 1, rect.height() - 3 }, highlight_color1);
+
+        // Outer shadow
+        painter.draw_line({ 0, rect.height() - 1 }, { rect.width() - 1, rect.height() - 1 }, shadow_color2);
+        painter.draw_line({ rect.width() - 1, 0 }, { rect.width() - 1, rect.height() - 2 }, shadow_color2);
+
+        // Inner shadow
+        painter.draw_line({ 1, rect.height() - 2 }, { rect.width() - 2, rect.height() - 2 }, shadow_color1);
+        painter.draw_line({ rect.width() - 2, 1 }, { rect.width() - 2, rect.height() - 3 }, shadow_color1);
+    }
+}
+
+void StylePainter::paint_button(Painter& painter, const Rect& rect, ButtonStyle button_style, bool pressed, bool hovered)
+{
+    if (button_style == ButtonStyle::Normal)
+        return paint_button_new(painter, rect, pressed);
+
+    Color button_color = Color::LightGray;
+    Color highlight_color = Color::White;
+    Color shadow_color = Color(96, 96, 96);
+
+    if (button_style == ButtonStyle::OldNormal)
+        painter.draw_rect(rect, Color::Black);
+
+    PainterStateSaver saver(painter);
+    painter.translate(rect.location());
+
+    if (pressed) {
+        // Base
+        painter.fill_rect({ 1, 1, rect.width() - 2, rect.height() - 2 }, button_color);
+
+        // Sunken shadow
+        painter.draw_line({ 1, 1 }, { rect.width() - 2, 1 }, shadow_color);
+        painter.draw_line({ 1, 2 }, {1, rect.height() - 2 }, shadow_color);
+
+        // Bottom highlight
+        painter.draw_line({ rect.width() - 2, 1 }, { rect.width() - 2, rect.height() - 3 }, highlight_color);
+        painter.draw_line({ 1, rect.height() - 2 }, { rect.width() - 2, rect.height() - 2 }, highlight_color);
+    } else if (button_style == ButtonStyle::OldNormal || (button_style == ButtonStyle::CoolBar && hovered)) {
+        // Base
+        painter.fill_rect({ 1, 1, rect.width() - 2, rect.height() - 2 }, button_color);
+
+        // White highlight
+        painter.draw_line({ 1, 1 }, { rect.width() - 2, 1 }, highlight_color);
+        painter.draw_line({ 1, 2 }, { 1, rect.height() - 2 }, highlight_color);
+
+        // Gray shadow
+        painter.draw_line({ rect.width() - 2, 1 }, { rect.width() - 2, rect.height() - 3 }, shadow_color);
+        painter.draw_line({ 1, rect.height() - 2 }, { rect.width() - 2, rect.height() - 2 }, shadow_color);
+    }
+}
+
+void StylePainter::paint_surface(Painter& painter, const Rect& rect)
+{
+    painter.fill_rect({ rect.x(), rect.y() + 1, rect.width(), rect.height() - 2 }, Color::LightGray);
+    painter.draw_line(rect.top_left(), rect.top_right(), Color::White);
+    painter.draw_line(rect.bottom_left(), rect.bottom_right(), Color::MidGray);
+    painter.draw_line(rect.top_left().translated(0, 1), rect.bottom_left().translated(0, -1), Color::White);
+    painter.draw_line(rect.top_right(), rect.bottom_right().translated(0, -1), Color::MidGray);
+}
diff --git a/SharedGraphics/StylePainter.h b/SharedGraphics/StylePainter.h
new file mode 100644
index 0000000000..7e6ad5f955
--- /dev/null
+++ b/SharedGraphics/StylePainter.h
@@ -0,0 +1,17 @@
+#pragma once
+
+class Painter;
+class Rect;
+
+enum class ButtonStyle { Normal, CoolBar, OldNormal };
+
+class StylePainter {
+public:
+    static StylePainter& the();
+
+    void paint_button(Painter&, const Rect&, ButtonStyle, bool pressed, bool hovered = false);
+    void paint_surface(Painter&, const Rect&);
+
+private:
+    StylePainter();
+};