// TortoiseSVN - a Windows shell extension for easy version control

// Copyright (C) 2003-2007, 2012-2014, 2018, 2020-2021 - TortoiseSVN
// Copyright (C) 2012-2013, 2015-2016 - TortoiseGit

// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#include "stdafx.h"
#include "resource.h"
#include "FindBar.h"
#include "registry.h"
#include "LoadIconEx.h"
#include "Theme.h"
#include <string>
#include <Commdlg.h>

CFindBar::CFindBar()
    : m_hParent(nullptr)
    , m_hIcon(nullptr)
    , m_themeCallbackId(0)
{
}

CFindBar::~CFindBar()
{
    DestroyIcon(m_hIcon);
    CTheme::Instance().RemoveRegisteredCallback(m_themeCallbackId);
}

LRESULT CFindBar::DlgFunc(HWND /*hwndDlg*/, UINT uMsg, WPARAM wParam, LPARAM /*lParam*/)
{
    switch (uMsg)
    {
        case WM_INITDIALOG:
        {
            m_hIcon = LoadIconEx(hResource, MAKEINTRESOURCE(IDI_CANCELNORMAL));
            SendMessage(GetDlgItem(*this, IDC_FINDEXIT), BM_SETIMAGE, IMAGE_ICON, reinterpret_cast<LPARAM>(m_hIcon));
            m_themeCallbackId = CTheme::Instance().RegisterThemeChangeCallback(
                [this]() {
                    SetTheme(CTheme::Instance().IsDarkTheme());
                });
            SetTheme(CTheme::Instance().IsDarkTheme());
        }
            return TRUE;
        case WM_COMMAND:
            return DoCommand(LOWORD(wParam), HIWORD(wParam));
        default:
            return FALSE;
    }
}

LRESULT CFindBar::DoCommand(int id, int msg) const
{
    bool bFindPrev = false;
    switch (id)
    {
        case IDC_FINDPREV:
            bFindPrev = true;
            // fallthrough
        case IDC_FINDNEXT:
        {
            DoFind(bFindPrev);
        }
        break;
        case IDC_FINDEXIT:
        {
            ::SendMessage(m_hParent, COMMITMONITOR_FINDEXIT, 0, 0);
        }
        break;
        case IDC_FINDTEXT:
        {
            if (msg == EN_CHANGE)
            {
                SendMessage(m_hParent, COMMITMONITOR_FINDRESET, 0, 0);
                DoFind(false);
            }
        }
        break;
    }
    return 1;
}

void CFindBar::DoFind(bool bFindPrev) const
{
    int  len      = ::GetWindowTextLength(GetDlgItem(*this, IDC_FINDTEXT));
    auto findtext = std::make_unique<wchar_t[]>(len + 1LL);
    if (!::GetWindowText(GetDlgItem(*this, IDC_FINDTEXT), findtext.get(), len + 1))
        return;
    std::wstring ft             = std::wstring(findtext.get());
    const bool   bCaseSensitive = !!SendMessage(GetDlgItem(*this, IDC_MATCHCASECHECK), BM_GETCHECK, 0, 0);
    const UINT   message        = bFindPrev ? COMMITMONITOR_FINDMSGPREV : COMMITMONITOR_FINDMSGNEXT;
    ::SendMessage(m_hParent, message, static_cast<WPARAM>(bCaseSensitive), reinterpret_cast<LPARAM>(ft.c_str()));
}

void CFindBar::SetTheme(bool bDark) const
{
    CTheme::Instance().SetThemeForDialog(*this, bDark);
}