1 files changed, 102 insertions, 0 deletions
diff --git a/Userland/Libraries/LibGUI/Icon.cpp b/Userland/Libraries/LibGUI/Icon.cpp
new file mode 100644
index 0000000000..650b440842
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+++ b/Userland/Libraries/LibGUI/Icon.cpp
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+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/String.h>
+#include <LibGUI/Icon.h>
+#include <LibGfx/Bitmap.h>
+
+namespace GUI {
+
+Icon::Icon()
+    : m_impl(IconImpl::create())
+{
+}
+
+Icon::Icon(const IconImpl& impl)
+    : m_impl(const_cast<IconImpl&>(impl))
+{
+}
+
+Icon::Icon(const Icon& other)
+    : m_impl(other.m_impl)
+{
+}
+
+Icon::Icon(RefPtr<Gfx::Bitmap>&& bitmap)
+    : Icon()
+{
+    if (bitmap) {
+        ASSERT(bitmap->width() == bitmap->height());
+        int size = bitmap->width();
+        set_bitmap_for_size(size, move(bitmap));
+    }
+}
+
+Icon::Icon(RefPtr<Gfx::Bitmap>&& bitmap1, RefPtr<Gfx::Bitmap>&& bitmap2)
+    : Icon(move(bitmap1))
+{
+    if (bitmap2) {
+        ASSERT(bitmap2->width() == bitmap2->height());
+        int size = bitmap2->width();
+        set_bitmap_for_size(size, move(bitmap2));
+    }
+}
+
+const Gfx::Bitmap* IconImpl::bitmap_for_size(int size) const
+{
+    auto it = m_bitmaps.find(size);
+    if (it != m_bitmaps.end())
+        return it->value.ptr();
+
+    int best_diff_so_far = INT32_MAX;
+    const Gfx::Bitmap* best_fit = nullptr;
+    for (auto& it : m_bitmaps) {
+        int abs_diff = abs(it.key - size);
+        if (abs_diff < best_diff_so_far) {
+            best_diff_so_far = abs_diff;
+            best_fit = it.value.ptr();
+        }
+    }
+    return best_fit;
+}
+
+void IconImpl::set_bitmap_for_size(int size, RefPtr<Gfx::Bitmap>&& bitmap)
+{
+    if (!bitmap) {
+        m_bitmaps.remove(size);
+        return;
+    }
+    m_bitmaps.set(size, move(bitmap));
+}
+
+Icon Icon::default_icon(const StringView& name)
+{
+    auto bitmap16 = Gfx::Bitmap::load_from_file(String::formatted("/res/icons/16x16/{}.png", name));
+    auto bitmap32 = Gfx::Bitmap::load_from_file(String::formatted("/res/icons/32x32/{}.png", name));
+    return Icon(move(bitmap16), move(bitmap32));
+}
+
+}