/** \file
 * \brief Scintilla control: Scrolling and automatic scrolling
 *
 * See Copyright Notice in "iup.h"
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>


#include <Scintilla.h>

#include "iup.h"
#include "iup_scintilla.h"

#include "iup_object.h"
#include "iup_attrib.h"
#include "iup_str.h"

#include "iupsci.h"

/***** SCROLLING AND AUTOMATIC SCROLLING 
SCI_LINESCROLL(int column, int line)
SCI_SCROLLCARET
SCI_SETXCARETPOLICY(int caretPolicy, int caretSlop)
SCI_SETYCARETPOLICY(int caretPolicy, int caretSlop)
--SCI_SETVISIBLEPOLICY(int caretPolicy, int caretSlop)
SCI_SETHSCROLLBAR(bool visible)
SCI_GETHSCROLLBAR
SCI_SETVSCROLLBAR(bool visible)
SCI_GETVSCROLLBAR
--SCI_GETXOFFSET
--SCI_SETXOFFSET(int xOffset)
SCI_SETSCROLLWIDTH(int pixelWidth)
SCI_GETSCROLLWIDTH
--SCI_SETSCROLLWIDTHTRACKING(bool tracking)
--SCI_GETSCROLLWIDTHTRACKING
--SCI_SETENDATLASTLINE(bool endAtLastLine)
--SCI_GETENDATLASTLINE
*/

static int iSciGetPolicy(const char *value)
{
  int policy = 0;
  int len = 0;

  const char *lastValue = value;
  const char *nextValue = iupStrNextValue(value, (int)strlen(value), &len, '|');
  while (len != 0)
  {
    if (iupStrEqualPartial(lastValue, "SLOP"))
      policy |= CARET_SLOP;
    if (iupStrEqualPartial(lastValue, "STRICT"))
      policy |= CARET_STRICT;
    if (iupStrEqualPartial(lastValue, "JUMPS"))
      policy |= CARET_JUMPS;
    if (iupStrEqualPartial(lastValue, "EVEN"))
      policy |= CARET_EVEN;

    lastValue = nextValue;
    nextValue = iupStrNextValue(nextValue, (int)strlen(nextValue), &len, ' ');
  }

  return policy;
}

static int iScintillaSetXCaretPolicyAttrib(Ihandle *ih, const char *value)
{
  int policy = iSciGetPolicy(value);
  int slop = iupAttribGetInt(ih, "CARETSLOP");
  IupScintillaSendMessage(ih, SCI_SETXCARETPOLICY, policy, slop);
  return 0;
}

static int iScintillaSetYCaretPolicyAttrib(Ihandle *ih, const char *value)
{
  int policy = iSciGetPolicy(value);
  int slop = iupAttribGetInt(ih, "CARETSLOP");
  IupScintillaSendMessage(ih, SCI_SETYCARETPOLICY, policy, slop);
  return 0;
}

static int iScintillaSetScrollByAttrib(Ihandle *ih, const char *value)
{
  int lin, col;
  iupStrToIntInt(value, &lin, &col, ',');

  IupScintillaSendMessage(ih, SCI_LINESCROLL, col, lin);

  return 0;
}

static int iScintillaSetScrollCaretAttrib(Ihandle *ih, const char *value)
{
  (void)value;
  IupScintillaSendMessage(ih, SCI_SCROLLCARET, 0, 0);
  return 0;
}

static char* iScintillaGetScrollWidthTrackingAttrib(Ihandle* ih)
{
  return iupStrReturnBoolean((int)IupScintillaSendMessage(ih, SCI_GETSCROLLWIDTHTRACKING, 0, 0));
}

static int iScintillaSetScrollWidthTrackingAttrib(Ihandle* ih, const char* value)
{
  IupScintillaSendMessage(ih, SCI_SETSCROLLWIDTHTRACKING, iupStrBoolean(value), 0);
  return 0;
}

static char* iScintillaGetScrollWidthAttrib(Ihandle* ih)
{
  int pixelWidth = (int)IupScintillaSendMessage(ih, SCI_GETSCROLLWIDTH, 0, 0);
  return iupStrReturnInt(pixelWidth);
}

static int iScintillaSetScrollWidthAttrib(Ihandle* ih, const char* value)
{
  int pixelWidth;

  iupStrToInt(value, &pixelWidth);

  if (pixelWidth < 1)
    pixelWidth = 2000;

  IupScintillaSendMessage(ih, SCI_SETSCROLLWIDTH, pixelWidth, 0);

  return 0;
}

static char* iScintillaGetScrollbarAttrib(Ihandle* ih)
{
  if (ih->data->sb == (IUP_SB_HORIZ | IUP_SB_VERT))
    return "YES";
  if (ih->data->sb & IUP_SB_HORIZ)
    return "HORIZONTAL";
  if (ih->data->sb & IUP_SB_VERT)
    return "VERTICAL";
  
  return "NO";
}

static int iScintillaSetScrollbarAttrib(Ihandle* ih, const char* value)
{
  if (!value)
    value = "YES";    /* default is YES */

  if (iupStrEqualNoCase(value, "YES"))
    ih->data->sb = IUP_SB_HORIZ | IUP_SB_VERT;
  else if (iupStrEqualNoCase(value, "HORIZONTAL"))
    ih->data->sb = IUP_SB_HORIZ;
  else if (iupStrEqualNoCase(value, "VERTICAL"))
    ih->data->sb = IUP_SB_VERT;
  else
    ih->data->sb = IUP_SB_NONE;

  return 0;
}

void iupScintillaRegisterScrolling(Iclass* ic)
{
  iupClassRegisterAttribute(ic, "SCROLLBAR", iScintillaGetScrollbarAttrib, iScintillaSetScrollbarAttrib, IUPAF_SAMEASSYSTEM, "YES", IUPAF_NOT_MAPPED|IUPAF_NO_INHERIT);

  iupClassRegisterAttribute(ic, "SCROLLBY", NULL, iScintillaSetScrollByAttrib, NULL, NULL, IUPAF_WRITEONLY|IUPAF_NO_INHERIT);
  iupClassRegisterAttribute(ic, "SCROLLTOCARET", NULL, iScintillaSetScrollCaretAttrib, NULL, NULL, IUPAF_WRITEONLY|IUPAF_NO_INHERIT);
  iupClassRegisterAttribute(ic, "SCROLLWIDTH", iScintillaGetScrollWidthAttrib, iScintillaSetScrollWidthAttrib, IUPAF_SAMEASSYSTEM, "2000", IUPAF_NO_INHERIT);
  iupClassRegisterAttribute(ic, "SCROLLWIDTHTRACKING", iScintillaGetScrollWidthTrackingAttrib, iScintillaSetScrollWidthTrackingAttrib, NULL, NULL, IUPAF_NO_INHERIT);

  iupClassRegisterAttribute(ic, "CARETXPOLICY", NULL, iScintillaSetXCaretPolicyAttrib, NULL, NULL, IUPAF_WRITEONLY | IUPAF_NO_INHERIT);
  iupClassRegisterAttribute(ic, "CARETYPOLICY", NULL, iScintillaSetYCaretPolicyAttrib, NULL, NULL, IUPAF_WRITEONLY | IUPAF_NO_INHERIT);
  iupClassRegisterAttribute(ic, "CARETSLOP", NULL, NULL, NULL, NULL, IUPAF_NO_INHERIT);
}