/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * 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.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    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.

    SUBSYSTEM:    nGenEx.lib
    FILE:         EditBox.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    EditBox ActiveWindow class
*/

#include "MemDebug.h"
#include "EditBox.h"
#include "FormWindow.h"
#include "Video.h"
#include "Font.h"
#include "Keyboard.h"
#include "Mouse.h"

DWORD GetRealTime();

// +--------------------------------------------------------------------+

static int old_cursor;

// +--------------------------------------------------------------------+

EditBox::EditBox(ActiveWindow* p, int ax, int ay, int aw, int ah, DWORD aid)
    : ScrollWindow(p->GetScreen(), ax, ay, aw, ah, aid, 0, p), caret_x(0), caret_y(0)
{
    sel_start         = 0;
    sel_length        = 0;
    h_offset          = 0;
    pass_char         = 0;

    selected_color    = Color::Yellow;

    char buf[32];
    sprintf_s(buf, "EditBox %d", id);
    desc = buf;
}

EditBox::EditBox(Screen* s, int ax, int ay, int aw, int ah, DWORD aid)
    : ScrollWindow(s, ax, ay, aw, ah, aid), caret_x(0), caret_y(0)
{
    sel_start         = 0;
    sel_length        = 0;
    h_offset          = 0;
    pass_char         = 0;

    selected_color    = Color::Yellow;

    char buf[32];
    sprintf_s(buf, "EditBox %d", id);
    desc = buf;
}

EditBox::~EditBox()
{
}

// +--------------------------------------------------------------------+

void
EditBox::DrawContent(const Rect& ctrl_rect)
{
    int h = rect.h;

    if (line_height < 1)
    line_height = GetFont()->Height();
    page_size = h / (line_height + leading);
}

// +--------------------------------------------------------------------+

void
EditBox::DrawTabbedText()
{
    if (font && text.length()) {
        int border_size = 4;

        if (style & WIN_RAISED_FRAME && style & WIN_SUNK_FRAME)
        border_size = 8;

        Rect label_rect = rect;

        label_rect.x  = border_size;
        label_rect.y  = border_size;
        label_rect.w -= border_size * 2;
        label_rect.h -= border_size * 2;

        if (focus)
        font->SetCaretIndex(sel_start);

        // if displaying in password mode, create a display string
        // containing the proper number of password chars:
        Text s = text;
        if (pass_char)
        s = Text(pass_char, text.length());

        // no tabs set:
        if (tab[0] == 0) {
            DWORD text_flags = DT_WORDBREAK | text_align;

            if (single_line)
            text_flags = text_flags | DT_SINGLELINE;

            if (style & WIN_TEXT_SHADOW) {
                label_rect.x++;
                label_rect.y++;
                
                font->SetColor(back_color);
                DrawText(s.data() + h_offset, 0, label_rect, text_flags);
                
                label_rect.x--;
                label_rect.y--;
            }
            
            font->SetColor(fore_color);
            DrawText(s.data() + h_offset, 0, label_rect, text_flags);
        }

        // use tabs:
        else {
        }

        font->SetCaretIndex(-1);
    }
    else {
        caret_x = 2;
        caret_y = 3;
    }
}

// +--------------------------------------------------------------------+

Color EditBox::GetSelectedColor()
{
    return selected_color;
}

void  EditBox::SetSelectedColor(Color c)
{
    if (selected_color != c) {
        selected_color = c;
    }
}

Text  EditBox::GetSelText()
{
    if (sel_start == 0 && sel_length == text.length())
    return text;

    Text selection;
    char* buf = new(__FILE__,__LINE__) char[sel_length+1];

    if (buf) {
        for (int i = 0; i < sel_length; i++)
        buf[i] = text[(int) (sel_start + i)];

        buf[sel_length] = 0;

        selection = buf;
        delete [] buf;
    }

    return selection;
}

void  EditBox::SetSelStart(int n)
{
    if (n >= 0 && n <= text.length())
    sel_start = n;
}

void  EditBox::SetSelLength(int n)
{
    if (n <= text.length() - sel_start)
    sel_length = n;
}

void  EditBox::EnsureCaretVisible()
{
    if (!single_line) {
        h_offset = 0;
        return;
    }

    if (sel_start < 0) {
        sel_start = 0;
        h_offset  = 0;
    }

    else if (sel_start > h_offset) {
        int   x_caret;
        bool  moved;

        do {
            x_caret = 0;
            moved   = false;

            if (pass_char) {
                Text pass = Text(pass_char, sel_start-h_offset);
                x_caret += font->StringWidth(pass.data(), pass.length());
            }
            else {
                Text sub = text.substring(h_offset, sel_start-h_offset);
                x_caret += font->StringWidth(sub.data(), sub.length());
            }

            if (x_caret >= Width()-4) {
                if (h_offset < text.length()) {
                    h_offset++;
                    moved = true;
                }
            }
        }
        while (moved);
    }

    else {
        h_offset = sel_start;
    }
}

bool  EditBox::CanScroll(int dir, int nlines)
{
    return false;
}

void  EditBox::Scroll(int direction, int nlines)
{
    scrolling = SCROLL_NONE;
}

void  EditBox::ScrollTo(int index)
{
}

int   EditBox::GetPageCount()
{
    return 1;
}

int   EditBox::GetPageSize()
{
    return page_size;
}

// +--------------------------------------------------------------------+

void EditBox::SetFocus()
{
    ActiveWindow::SetFocus();

    sel_start  = text.length();
    sel_length = 0;
}

void EditBox::KillFocus()
{
    ActiveWindow::KillFocus();
}

// +--------------------------------------------------------------------+

int EditBox::CaretFromPoint(int x, int y) const
{
    return 0;
}

// +--------------------------------------------------------------------+

int EditBox::OnMouseMove(int x, int y)
{
    return ActiveWindow::OnMouseMove(x,y);
}

// +--------------------------------------------------------------------+

int EditBox::OnLButtonDown(int x, int y)
{
    return ActiveWindow::OnLButtonDown(x,y);
}

// +--------------------------------------------------------------------+

int EditBox::OnLButtonUp(int x, int y)
{
    return ActiveWindow::OnLButtonUp(x,y);
}

// +--------------------------------------------------------------------+

int EditBox::OnClick()
{
    int fire_click = !scrolling;

    if (scrolling == SCROLL_THUMB)
    scrolling = SCROLL_NONE;

    if (fire_click)
    return ActiveWindow::OnClick();

    return 0;
}

// +--------------------------------------------------------------------+

void EditBox::Insert(char c)
{
    if (single_line && c == '\n')
    return;

    if (sel_start < text.length()) {
        if (sel_start == 0) {
            text = Text(c) + text;
            sel_start = 1;
        }
        else {
            Text t1 = text.substring(0, sel_start);
            Text t2 = text.substring(sel_start, text.length()-sel_start);
            text = t1 + Text(c) + t2;
            sel_start++;
        }
    }
    else {
        text += c;
        sel_start = text.length();
    }

    EnsureCaretVisible();
}

void EditBox::Insert(const char* s)
{
}

void EditBox::Delete()
{
    if (sel_start < text.length()) {
        if (sel_start == 0) {
            text = text.substring(1, text.length()-1);
        }
        else {
            Text t1 = text.substring(0, sel_start);
            Text t2 = text.substring(sel_start+1, text.length()-sel_start-1);
            text = t1 + t2;
        }
    }

    EnsureCaretVisible();
}

void EditBox::Backspace()
{
    if (sel_start > 0) {
        if (sel_start == text.length()) {
            text = text.substring(0, sel_start-1);
        }
        else {
            Text t1 = text.substring(0, sel_start-1);
            Text t2 = text.substring(sel_start, text.length()-sel_start);
            text = t1 + t2;
        }

        sel_start--;
        EnsureCaretVisible();
    }
}

int EditBox::OnKeyDown(int vk, int flags)
{
    if (vk >= 'A' && vk <= 'Z') {
        if (flags & 1)
        Insert((char) vk);
        else
        Insert((char) tolower(vk));
    }
    else {
        switch (vk) {
        case VK_LEFT:
            if (sel_start > 0) sel_start--;
            EnsureCaretVisible();
            break;

        case VK_RIGHT:
            if (sel_start < text.length()) sel_start++;
            EnsureCaretVisible();
            break;

        case VK_HOME:
            sel_start = 0;
            EnsureCaretVisible();
            break;

        case VK_END:
            sel_start = text.length();
            EnsureCaretVisible();
            break;

        case VK_DELETE:   Delete();      break;
        case VK_BACK:     Backspace();   break;

        case VK_SPACE:    Insert(' ');   break;
        case VK_RETURN:   Insert('\n');  break;

        case VK_NUMPAD0:  Insert('0');   break;
        case VK_NUMPAD1:  Insert('1');   break;
        case VK_NUMPAD2:  Insert('2');   break;
        case VK_NUMPAD3:  Insert('3');   break;
        case VK_NUMPAD4:  Insert('4');   break;
        case VK_NUMPAD5:  Insert('5');   break;
        case VK_NUMPAD6:  Insert('6');   break;
        case VK_NUMPAD7:  Insert('7');   break;
        case VK_NUMPAD8:  Insert('8');   break;
        case VK_NUMPAD9:  Insert('9');   break;
        case VK_DECIMAL:  Insert('.');   break;
        case VK_ADD:      Insert('+');   break;
        case VK_SUBTRACT: Insert('-');   break;
        case VK_MULTIPLY: Insert('*');   break;
        case VK_DIVIDE:   Insert('/');   break;

        case '0': if (flags & 1) Insert(')'); else Insert('0'); break;
        case '1': if (flags & 1) Insert('!'); else Insert('1'); break;
        case '2': if (flags & 1) Insert('@'); else Insert('2'); break;
        case '3': if (flags & 1) Insert('#'); else Insert('3'); break;
        case '4': if (flags & 1) Insert('$'); else Insert('4'); break;
        case '5': if (flags & 1) Insert('%'); else Insert('5'); break;
        case '6': if (flags & 1) Insert('^'); else Insert('6'); break;
        case '7': if (flags & 1) Insert('&'); else Insert('7'); break;
        case '8': if (flags & 1) Insert('*'); else Insert('8'); break;
        case '9': if (flags & 1) Insert('('); else Insert('9'); break;
        case 186: if (flags & 1) Insert(':'); else Insert(';'); break;
        case 187: if (flags & 1) Insert('+'); else Insert('='); break;
        case 188: if (flags & 1) Insert('<'); else Insert(','); break;
        case 189: if (flags & 1) Insert('_'); else Insert('-'); break;
        case 190: if (flags & 1) Insert('>'); else Insert('.'); break;
        case 191: if (flags & 1) Insert('?'); else Insert('/'); break;
        case 192: if (flags & 1) Insert('~'); else Insert('`'); break;
        case 219: if (flags & 1) Insert('{'); else Insert('['); break;
        case 221: if (flags & 1) Insert('}'); else Insert(']'); break;
        case 220: if (flags & 1) Insert('|'); else Insert('\\'); break;
        case 222: if (flags & 1) Insert('"'); else Insert('\''); break;
        }
    }

    return ActiveWindow::OnKeyDown(vk, flags);
}