From 13d7c09125f8eec703d0a43a9a87fc8aa08f7319 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 12 Jan 2021 12:17:30 +0100
Subject: Libraries: Move to Userland/Libraries/

---
 .../Libraries/LibKeyboard/CharacterMapFile.cpp     | 110 +++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 Userland/Libraries/LibKeyboard/CharacterMapFile.cpp

(limited to 'Userland/Libraries/LibKeyboard/CharacterMapFile.cpp')

diff --git a/Userland/Libraries/LibKeyboard/CharacterMapFile.cpp b/Userland/Libraries/LibKeyboard/CharacterMapFile.cpp
new file mode 100644
index 0000000000..b6fdc593ed
--- /dev/null
+++ b/Userland/Libraries/LibKeyboard/CharacterMapFile.cpp
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
+ * 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 "CharacterMapFile.h"
+#include <AK/ByteBuffer.h>
+#include <AK/Utf8View.h>
+#include <LibCore/File.h>
+
+namespace Keyboard {
+
+Optional<CharacterMapData> CharacterMapFile::load_from_file(const String& file_name)
+{
+    auto path = file_name;
+    if (!path.ends_with(".json")) {
+        StringBuilder full_path;
+        full_path.append("/res/keymaps/");
+        full_path.append(file_name);
+        full_path.append(".json");
+        path = full_path.to_string();
+    }
+
+    auto file = Core::File::construct(path);
+    file->open(Core::IODevice::ReadOnly);
+    if (!file->is_open()) {
+        dbg() << "Failed to open " << file_name << ":" << file->error_string();
+        return {};
+    }
+
+    auto file_contents = file->read_all();
+    auto json_result = JsonValue::from_string(file_contents);
+    if (!json_result.has_value())
+        return {};
+    auto json = json_result.value().as_object();
+
+    Vector<u32> map = read_map(json, "map");
+    Vector<u32> shift_map = read_map(json, "shift_map");
+    Vector<u32> alt_map = read_map(json, "alt_map");
+    Vector<u32> altgr_map = read_map(json, "altgr_map");
+    Vector<u32> shift_altgr_map = read_map(json, "shift_altgr_map");
+
+    CharacterMapData character_map;
+    for (int i = 0; i < CHAR_MAP_SIZE; i++) {
+        character_map.map[i] = map.at(i);
+        character_map.shift_map[i] = shift_map.at(i);
+        character_map.alt_map[i] = alt_map.at(i);
+        if (altgr_map.is_empty()) {
+            // AltGr map was not found, using Alt map as fallback.
+            character_map.altgr_map[i] = alt_map.at(i);
+        } else {
+            character_map.altgr_map[i] = altgr_map.at(i);
+        }
+        if (shift_altgr_map.is_empty()) {
+            // Shift+AltGr map was not found, using Alt map as fallback.
+            character_map.shift_altgr_map[i] = alt_map.at(i);
+        } else {
+            character_map.shift_altgr_map[i] = shift_altgr_map.at(i);
+        }
+    }
+
+    return character_map;
+}
+
+Vector<u32> CharacterMapFile::read_map(const JsonObject& json, const String& name)
+{
+    if (!json.has(name))
+        return {};
+
+    Vector<u32> buffer;
+    buffer.resize(CHAR_MAP_SIZE);
+
+    auto map_arr = json.get(name).as_array();
+    for (int i = 0; i < map_arr.size(); i++) {
+        auto key_value = map_arr.at(i).as_string();
+        if (key_value.length() == 0) {
+            buffer[i] = 0;
+        } else if (key_value.length() == 1) {
+            buffer[i] = key_value.characters()[0];
+        } else {
+            Utf8View m_utf8_view(key_value.characters());
+            buffer[i] = *m_utf8_view.begin();
+        }
+    }
+
+    return buffer;
+}
+
+}
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