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/* Copyright (c) 2014-2015, Stanislaw Halik <sthalik@misaki.pl>

 * Permission to use, copy, modify, and/or distribute this
 * software for any purpose with or without fee is hereby granted,
 * provided that the above copyright notice and this permission
 * notice appear in all copies.
 */

#include "shortcuts.h"
#include "win32-shortcuts.h"

#include <QString>

#include <tuple>

void Shortcuts::free_binding(K& key)
{
#ifndef _WIN32
    if (key)
    {
        //key->setEnabled(false);
        //key->setShortcut(QKeySequence());
        delete key;
        key = nullptr;
    }
#else
    key.keycode = 0;
    key.guid = "";
#endif
}

void Shortcuts::bind_shortcut(K &key, const key_opts& k, bool held)
{
#if !defined(_WIN32)
    (void)held;
    using sh = QxtGlobalShortcut;
    if (key)
    {
        free_binding(key);
    }

    key = new sh;

    if (k.keycode != "")
    {
        key->setShortcut(QKeySequence::fromString(k.keycode, QKeySequence::PortableText));
        key->setEnabled();
    }
}
#else
    key = K();
    int idx = 0;
    QKeySequence code;

    if (k.guid != "")
    {
        key.guid = k.guid;
        key.keycode = k.button & ~Qt::KeyboardModifierMask;
        key.held = held;
        key.ctrl = !!(k.button & Qt::ControlModifier);
        key.alt = !!(k.button & Qt::AltModifier);
        key.shift = !!(k.button & Qt::ShiftModifier);
    }
    else
    {
        if (k.keycode == "")
            code = QKeySequence(Qt::Key_unknown);
        else
            code = QKeySequence::fromString(k.keycode, QKeySequence::PortableText);

        Qt::KeyboardModifiers mods = Qt::NoModifier;
        if (code != Qt::Key_unknown)
            win_key::from_qt(code, idx, mods);

        key.guid = "";
        key.keycode = idx;
        key.held = held;
        key.ctrl = !!(mods & Qt::ControlModifier);
        key.alt = !!(mods & Qt::AltModifier);
        key.shift = !!(mods & Qt::ShiftModifier);
    }
}
#endif

#ifdef _WIN32
void Shortcuts::receiver(const Key& k)
{
    const unsigned sz = keys.size();
    for (unsigned i = 0; i < sz; i++)
    {
        K& k_ = std::get<0>(keys[i]);
        if (k.guid != k_.guid)
            continue;
        if (k.keycode != k_.keycode)
            continue;

        if (k_.held && !k.held) continue;
        if (k_.alt != k.alt) continue;
        if (k_.ctrl != k.ctrl) continue;
        if (k_.shift != k.shift) continue;
        if (!k_.should_process())
            continue;

        fun& f = std::get<1>(keys[i]);
        f(k.held);
    }
}
#endif

Shortcuts::~Shortcuts()
{
    reload({});
}

void Shortcuts::reload(const t_keys& keys_)
{
    const unsigned sz = keys_.size();
#ifndef _WIN32
    for (tt& tuple : keys)
    {
        K k;
        std::tie(k, std::ignore, std::ignore) = tuple;
        delete k;
    }
#endif
    keys = std::vector<tt>();

    for (unsigned i = 0; i < sz; i++)
    {
        const auto& kk = keys_[i];
        const key_opts& opts = std::get<0>(kk);
        const bool held = std::get<2>(kk);
        auto const& fun = std::get<1>(kk);
#ifdef _WIN32
        K k;
#else
        K k(nullptr);
#endif
        bind_shortcut(k, opts, held);
        keys.emplace_back(k, [=](bool flag) { fun(flag); }, held);

#ifndef _WIN32
        const int idx = keys.size() - 1;
        tt& kk_ = keys[idx];
        auto fn = std::get<1>(kk_);
        connect(k, &QxtGlobalShortcut::activated, [fn, held](bool keydown) {
            if (keydown || !held)
                fn(keydown);
        });
#endif
    }
}