/* Copyright 1997 Acorn Computers Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/***************************************************/
/* File   : Choices.c                              */
/*                                                 */
/* Purpose: Functions relating to the choices      */
/*          dialogue box and associated sub        */
/*          windows                                */
/*                                                 */
/* Author : D.T.A.Brown                            */
/*                                                 */
/* History: 23-Sep-97: Created.                    */
/***************************************************/

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

#include "swis.h"

#include "HTMLLib.h" /* HTML library API, Which will include html2_ext.h, tags.h and struct.h */

#include "wimp.h"
#include "wimplib.h"
#include "event.h"

#include "toolbox.h"
#include "window.h"
#include "menu.h"
#include "ColourDbox.h"

#include "svcprint.h"
#include "Global.h"
#include "FromROSLib.h"
#include "Utils.h"

#include "Encoding.h"
#include "FetchPage.h"
#include "History.h"
#include "Menus.h"
#include "NestWimp.h"
#include "Save.h"
#include "URLutils.h"
#include "Windows.h"

#include "Choices.h"

static int            * subwindows        = NULL;
static ObjectId         current_subwindow = CDSubNone;
static ObjectId         colourdbox_id     = 0;

static int              save_ticked = -1;
static int              disp_ticked = -1;

global_choices        * new_choices       = NULL;
ObjectId                choices_windowid  = 0;

static _kernel_oserror * choices_show_subwindow          (ObjectId choices_window, int subwindow);
static _kernel_oserror * choices_set_contents            (void);
static _kernel_oserror * choices_get_contents            (void);

static int               choices_radio_click_handler     (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_set_button_handler      (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_cancel_button_handler   (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_save_button_handler     (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_encoding_button_handler (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_colour_button_handler   (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_colour_closed_handler   (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_colour_selected_handler (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_display_m_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_save_m_button_handler   (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_display_m_click_handler (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);
static int               choices_save_m_click_handler    (int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle);

static _kernel_oserror * choices_colour_set_component    (ObjectId window, ComponentId component, int colour);
static _kernel_oserror * choices_set_save_field          (ObjectId obj, ComponentId comp, int state);
static _kernel_oserror * choices_set_display_field       (ObjectId obj, ComponentId comp, int state);

/*************************************************/
/* choices_show_subwindow()                      */
/*                                               */
/* Shows a choice subwindow in the main choices  */
/* window.                                       */
/*                                               */
/* Parameters: the ObjectId of the main choices  */
/*             window                            */
/*                                               */
/*             the number of the subwindow to    */
/*             show.  Defined in choices.h       */
/*             Use CDSubNone to remove           */
/*             the current subwindow.            */
/*                                               */
/* Returns:    pointer to _kernel_oserror        */
/*************************************************/

static _kernel_oserror *choices_show_subwindow(ObjectId choices_window, int subwindow)
{
  _kernel_oserror         *e;
  int                     window_handle;
  WindowShowObjectBlock   show_block;
  WimpGetWindowStateBlock state;
  WimpGetWindowOutlineBlock outline;
  int                     vwidth, hheight;

  if (current_subwindow != CDSubNone)
  {
    /* remove the current subwindow */
    toolbox_hide_object(0, *(subwindows + current_subwindow));
  }

  if (subwindow == CDSubNone || !(*(subwindows + subwindow)) || subwindow == current_subwindow)
  {
    /* Have not been asked to open a new subwindow */

    current_subwindow = CDSubNone;
    return NULL;
  }

  RetError(window_get_wimp_handle(0, choices_window, &window_handle));
  state.window_handle = window_handle;
  RetError(wimp_get_window_state(&state));
  RetError(gadget_get_bbox(0, choices_window, CDPlaceHolder, &show_block.visible_area));
  windows_return_tool_sizes(NULL, &hheight, &vwidth);

  show_block.visible_area.xmin = coords_x_toscreen(show_block.visible_area.xmin, (WimpRedrawWindowBlock*)&state);
  show_block.visible_area.xmax = coords_x_toscreen(show_block.visible_area.xmax, (WimpRedrawWindowBlock*)&state);
  show_block.visible_area.ymin = coords_y_toscreen(show_block.visible_area.ymin, (WimpRedrawWindowBlock*)&state);
  show_block.visible_area.ymax = coords_y_toscreen(show_block.visible_area.ymax, (WimpRedrawWindowBlock*)&state);

  /* Adjustments for different types of window */

  #ifdef TRACE
    Printf("wimp flags : %x\n", state.flags);
  #endif

  RetError(window_get_wimp_handle(0, *(subwindows + subwindow), &state.window_handle));
  RetError(wimp_get_window_state(&state));

  if (state.flags & WimpWindow_VScroll) show_block.visible_area.xmax -= vwidth;
  else vwidth  = 0;

  if (state.flags & WimpWindow_HScroll) show_block.visible_area.ymin += hheight;
  else hheight = 0;

  show_block.xscroll = 0;
  show_block.yscroll = 0;
  show_block.behind  = -1;

  show_block.window_flags    = 0;
  show_block.alignment_flags = 0;

  /* Requires wimp handle just to be awkward */
  show_block.parent_window_handle = window_handle;

  RetError(toolbox_show_object(Toolbox_ShowObject_AsSubWindow,
                               *(subwindows + subwindow),
                               Toolbox_ShowObject_FullSpec,
                               &show_block,
                               choices_window,
                               -1));


  outline.window_handle = state.window_handle;
  wimp_get_window_outline(&outline);

  if (outline.outline.xmin < show_block.visible_area.xmin)
    show_block.visible_area.xmin += (show_block.visible_area.xmin - outline.outline.xmin);
  if (outline.outline.ymin < (show_block.visible_area.ymin - hheight))
    show_block.visible_area.ymin += (show_block.visible_area.ymin - outline.outline.ymin);
  if (outline.outline.xmax > (show_block.visible_area.xmax + vwidth))
    show_block.visible_area.xmax -= (outline.outline.xmax - show_block.visible_area.xmax);
  if (outline.outline.ymax > show_block.visible_area.ymax)
    show_block.visible_area.ymax -= (outline.outline.ymax - show_block.visible_area.ymax);

  e = toolbox_show_object(Toolbox_ShowObject_AsSubWindow,
                          *(subwindows + subwindow),
                          Toolbox_ShowObject_FullSpec,
                          &show_block,
                          choices_window,
                          -1);

  if (!e) current_subwindow = subwindow;

  return e;
}

/*************************************************/
/* choices_to_be_shown()                         */
/*                                               */
/* Called when the ECDToBeShown event is         */
/* generated.                                    */
/* Creates all the subwindow dialogues and fills */
/* them in with appropriate values.              */
/* Registers all additional event handlers used  */
/* while the choices dialogue is visible.        */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

int choices_to_be_shown(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror       *e;

  #ifdef TRACE
    Printf("called: choices_to_be_shown\n");
  #endif

  choices_windowid = idb->self_id;

  /* Allocate block for holding subwindows ObjectIds */
  if (!subwindows)
  {
    subwindows = malloc(sizeof(ObjectId)*CDNoSubwindows);
    if (!subwindows)
    {
      /* If hide object doesn't work, things are really screwed */

      e = toolbox_hide_object(0, idb->self_id);
      show_error_ret(e);

      e = make_no_memory_error(100); //
      show_error_ret(e);
      return 1;
    }
  }

  if (!new_choices)
  {
    new_choices = malloc(sizeof(global_choices));
    if (!new_choices)
    {
      /* If hide object doesn't work, things are really screwed */

      e = toolbox_hide_object(0, idb->self_id);
      show_error_ret(e);

      e = make_no_memory_error(100); //
      show_error_ret(e);
      return 1;
    }
    else
    {
      memcpy(new_choices, &choices, sizeof(global_choices));
    }
  }

  /* Create all choices subwindows.  Set their ObjectIds to NULL if they cannot be created */

  e = toolbox_create_object(0, "ChSub0", subwindows + CDSubBrowseDefaults);
  if (e) *(subwindows + CDSubBrowseDefaults) = NULL;
  e = toolbox_create_object(0, "ChSub1", subwindows + CDSubWindows);
  if (e) *(subwindows + CDSubWindows) = NULL;
  e = toolbox_create_object(0, "ChSub2", subwindows + CDSubColours);
  if (e) *(subwindows + CDSubColours) = NULL;
  e = toolbox_create_object(0, "ChSub3", subwindows + CDSubFonts);
  if (e) *(subwindows + CDSubFonts) = NULL;
  e = toolbox_create_object(0, "ChSub4", subwindows + CDSubHotlist);
  if (e) *(subwindows + CDSubHotlist) = NULL;
  e = toolbox_create_object(0, "ChSub5", subwindows + CDSubHistory);
  if (e) *(subwindows + CDSubHistory) = NULL;
  e = toolbox_create_object(0, "ChSub6", subwindows + CDSubSub6);
  if (e) *(subwindows + CDSubSub6) = NULL;
  e = toolbox_create_object(0, "ChSub7", subwindows + CDSubSub7);
  if (e) *(subwindows + CDSubSub7) = NULL;
  e = toolbox_create_object(0, "ChSub8", subwindows + CDSubSub8);
  if (e) *(subwindows + CDSubSub8) = NULL;

  e = choices_show_subwindow(idb->self_id, CDSubBrowseDefaults);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = radiobutton_set_state(0, idb->self_id, CDBrowseDefaults, 1);

  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = choices_set_contents();
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  /* Register choices event handlers */

  e = event_register_toolbox_handler(-1, ECDRG2, choices_radio_click_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, CDSet, choices_set_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, CDCancel, choices_cancel_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, CDSaveButton, choices_save_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_EncodingMenuBt, choices_encoding_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_ColourButton, choices_colour_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_HlDispBt, choices_display_m_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_HiDispBt, choices_display_m_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_HlSaveBt, choices_save_m_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECD_HiSaveBt, choices_save_m_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECDSaveMenuClick, choices_save_m_click_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_register_toolbox_handler(-1, ECDDispMenuClick, choices_display_m_click_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  return 1;
}

/*************************************************/
/* choices_delete_subwindows()                   */
/*                                               */
/* Deletes all subwindows, reports any and all   */
/* errors occuring while deleting them.          */
/* Frees the structure holding the subwindows.   */
/*************************************************/
static void choices_delete_subwindows(void)
{
  _kernel_oserror *e;
  int count;

  for(count = 0; count < CDNoSubwindows; count++)
  {
    if (*(subwindows + count))
    {
      e = toolbox_delete_object(0, *(subwindows + count));
      if (e) show_error_ret(e);
      *(subwindows + count) = 0;
    }
  }
  free(subwindows);
  subwindows = NULL;
}

/*************************************************/
/* choices_hidden()                              */
/*                                               */
/* Called when the ECDHidden event is generated. */
/* Deletes all the subwindow dialogues.          */
/* Deregisters all additional event handlers     */
/* used while the choices dialogue is visible.   */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

int choices_hidden(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;

  /* Close subwindow */

  e = choices_show_subwindow(idb->self_id, CDSubNone);
  if (e) show_error_ret(e);

  /* Delete all subwindow objects */

  choices_delete_subwindows();

  /* Deregister choices event handlers */

  e = event_deregister_toolbox_handler(-1, ECDRG2, choices_radio_click_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_deregister_toolbox_handler(-1, CDSet, choices_set_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_deregister_toolbox_handler(-1, CDCancel, choices_cancel_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_deregister_toolbox_handler(-1, CDSaveButton, choices_save_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_deregister_toolbox_handler(-1, ECD_EncodingMenuBt, choices_encoding_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}
  e = event_deregister_toolbox_handler(-1, ECD_ColourButton, choices_colour_button_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  return 1;
}

/*************************************************/
/* choices_radio_click_handler()                 */
/*                                               */
/* Shows the appropriate subwindow when a radio  */
/* button in the choices dialogue is clicked on  */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

static int choices_radio_click_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  ObjectId window;

  switch(idb->self_component)
  {
    case CDBrowseDefaults : window = CDSubBrowseDefaults; break;
    case CDWindows        : window = CDSubWindows;        break;
    case CDColours        : window = CDSubColours;        break;
    case CDFonts          : window = CDSubFonts;          break;
    case CDHotlist        : window = CDSubHotlist;        break;
    case CDHistory        : window = CDSubHistory;        break;
    case CDSub6           : window = CDSubSub6;           break;
    case CDSub7           : window = CDSubSub7;           break;
    case CDSub8           : window = CDSubSub8;           break;

    default               : window = CDNoSubwindows;      break;
  }

  choices_show_subwindow(idb->self_id, window);

  return 1;
}

/*************************************************/
/* choices_set_contents()                        */
/*                                               */
/* Sets the contents of all choices subwindows   */
/* to reflect the current state of the global    */
/* choices.                                      */
/*                                               */
/* Returns:    pointer to _kernel_oserror.       */
/*************************************************/

static _kernel_oserror *choices_set_contents(void)
{
  _kernel_oserror *e;

  /* Check that the BrowseDefaults subwindow exists */

  if (*(subwindows + CDSubBrowseDefaults))
  {
    RetError(writablefield_set_value(0, *(subwindows + CDSubBrowseDefaults), CD_Homepage, new_choices->home_page));

    RetError(optionbutton_set_state(0, *(subwindows + CDSubBrowseDefaults), CD_UnderlineLinks, new_choices->underline_links));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubBrowseDefaults), CD_UseDocColours,  new_choices->use_source_cols));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubBrowseDefaults), CD_ShowForeground, new_choices->show_foreground));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubBrowseDefaults), CD_ShowBackground, new_choices->show_background));

    /* Get encoding name */

    RetError(choices_set_encoding_field());
  }

  /* Check that the Windows subwindow exists */

  if (*(subwindows + CDSubWindows))
  {
    RetError(optionbutton_set_state(0, *(subwindows + CDSubWindows), CD_URLBar,     new_choices->url_bar));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubWindows), CD_StatusBar,  new_choices->status_bar));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubWindows), CD_ButtonBar,  new_choices->button_bar));
    RetError(optionbutton_set_state(0, *(subwindows + CDSubWindows), CD_FullScreen, new_choices->full_screen));
  }

  if (*(subwindows + CDSubColours))
  {
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_BackColour, new_choices->background_colour));
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_TextColour, new_choices->text_colour));
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_LinkColour, new_choices->link_colour));
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_UsedColour, new_choices->used_colour));
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_FolwColour, new_choices->followed_colour));
    RetError(choices_colour_set_component(*(subwindows + CDSubColours), CD_SlctColour, new_choices->selected_colour));
  }

  if (*(subwindows + CDSubHotlist))
  {
    RetError(numberrange_set_value(0, *(subwindows + CDSubHotlist), CD_HlAutoOpen,   new_choices->auto_open_delay));
    RetError(numberrange_set_value(0, *(subwindows + CDSubHotlist), CD_HlAutoScroll, new_choices->auto_scroll_delay));
    RetError(choices_set_display_field(*(subwindows + CDSubHotlist), CD_HlDispDisp, new_choices->hotlist_show));
    RetError(choices_set_save_field(*(subwindows + CDSubHotlist), CD_HlSaveDisp, new_choices->save_hotlist));
  }

  if (*(subwindows + CDSubHistory))
  {
    RetError(numberrange_set_value(0, *(subwindows + CDSubHistory), CD_HiLines,   new_choices->v_hist_size));
    RetError(numberrange_set_value(0, *(subwindows + CDSubHistory), CD_HiMaxSize, new_choices->g_hist_size));
    RetError(choices_set_display_field(*(subwindows + CDSubHistory), CD_HiDispDisp, new_choices->show_urls));
    RetError(choices_set_save_field(*(subwindows + CDSubHistory), CD_HiSaveDisp, new_choices->save_history));
  }

  return NULL;
}

/*************************************************/
/* choices_get_contents()                        */
/*                                               */
/* Sets the state of the global choices to       */
/* reflect the contents of all the choices       */
/* subwindows.                                   */
/*                                               */
/* Returns:    pointer to _kernel_oserror        */
/*************************************************/

static _kernel_oserror *choices_get_contents(void)
{
  _kernel_oserror *e;
  int state;
  char *tempstring;
  int reqsize;

  /* Check that the BrowseDefaults subwindow exists */

  if (*(subwindows + CDSubBrowseDefaults))
  {
    RetError(writablefield_get_value(0, *(subwindows + CDSubBrowseDefaults), CD_Homepage, NULL, 0, &reqsize));
    tempstring = malloc(reqsize+1);
    if (tempstring)
    {
      RetError(writablefield_get_value(0, *(subwindows + CDSubBrowseDefaults), CD_Homepage, tempstring, reqsize, NULL));
      if (!strcmp(tempstring, new_choices->home_page))
      {
        free(tempstring);
      }
      else
      {
        free(new_choices->home_page);
        new_choices->home_page = tempstring;
      }
    }
    else
    {
      show_error_ret(make_no_memory_error(100)); //
    }

    RetError(optionbutton_get_state(0, *(subwindows + CDSubBrowseDefaults), CD_UnderlineLinks, &state));
    new_choices->underline_links = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubBrowseDefaults), CD_UseDocColours,  &state));
    new_choices->use_source_cols = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubBrowseDefaults), CD_ShowForeground, &state));
    new_choices->show_foreground = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubBrowseDefaults), CD_ShowBackground, &state));
    new_choices->show_background = !!state;
  }

  /* Check that the Windows subwindow exists */

  if (*(subwindows + CDSubWindows))
  {
    RetError(optionbutton_get_state(0, *(subwindows + CDSubWindows), CD_URLBar,     &state));
    new_choices->url_bar     = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubWindows), CD_StatusBar,  &state));
    new_choices->status_bar  = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubWindows), CD_ButtonBar,  &state));
    new_choices->button_bar  = !!state;
    RetError(optionbutton_get_state(0, *(subwindows + CDSubWindows), CD_FullScreen, &state));
    new_choices->full_screen = !!state;
  }

  if (*(subwindows + CDSubHotlist))
  {
    RetError(numberrange_get_value(0, *(subwindows + CDSubHotlist), CD_HlAutoOpen,   &new_choices->auto_open_delay));
    RetError(numberrange_get_value(0, *(subwindows + CDSubHotlist), CD_HlAutoScroll, &new_choices->auto_scroll_delay));
  }

  if (*(subwindows + CDSubHistory))
  {
    RetError(numberrange_get_value(0, *(subwindows + CDSubHistory), CD_HiLines,   &new_choices->v_hist_size));
    RetError(numberrange_get_value(0, *(subwindows + CDSubHistory), CD_HiMaxSize, &new_choices->g_hist_size));
  }

  memcpy(&choices, new_choices, sizeof(global_choices));

  return NULL;
}

/*************************************************/
/* choices_set_button_handler()                  */
/*                                               */
/* Called when the set button in the main        */
/* choices dialogue is clicked.                  */
/* Uses choices_get_contents to set the global   */
/* choices to reflect the choices set in the     */
/* choices subwindows                            */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

static int choices_set_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e = NULL;
  e = choices_get_contents();
  if (e) show_error_ret(e);

  return 1;
}

/*************************************************/
/* choices_cancel_button_handler()               */
/*                                               */
/* Called when the cancel button in the main     */
/* choices dialogue is clicked.                  */
/* Uses choices_set_contents to restore the      */
/* subwindows to their previous state.           */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

static int choices_cancel_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e = NULL;

  memcpy(new_choices, &choices, sizeof(global_choices));

  choices_set_contents();
  if (e) show_error_ret(e);

  return 1;
}

/*************************************************/
/* choices_save_button_handler()                 */
/*                                               */
/* Called when the set button in the main        */
/* choices dialogue is clicked.                  */
/* Uses choices_get_contents to set the global   */
/* choices to reflect the choices set in the     */
/* choices subwindows and then saves the choices */
/* file.                                         */
/*                                               */
/* Parameters are as standard for a Toolbox      */
/* event handler.                                */
/*************************************************/

static int choices_save_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e = NULL;
  e = choices_get_contents();
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = save_save_choices(NULL);
  if (e) show_error_ret(e);

  return 1;
}

/*************************************************/
/* choices_set_encoding_field()                  */
/*                                               */
/* Sets the encoding display field appropriately */
/* to reflect the current state of               */
/* new_choices->encoding                         */
/*************************************************/

_kernel_oserror * choices_set_encoding_field(void)
{
  _kernel_oserror *e;
  ObjectId    objid;
  ComponentId compid;
  char *textptr;
  int sizereqd;

  /* Find menu item which contains encoding name */

  if (encoding_get_encoding_item(new_choices->encoding, &objid, &compid))
  {
    RetError(menu_get_entry_text(0, objid, compid, NULL, 0, &sizereqd));

    /* Add 1 to the buffer size just incase the sizereqd field is returned as string */
    /* length rather than the buffer size required.  Typical paranoid precautions    */
    /* when using the toolbox.                                                       */

    textptr = malloc(sizereqd+1);

    if (textptr)
    {
      e = menu_get_entry_text(0, objid, compid, textptr, sizereqd+1, NULL);
      if (e)
      {
        free(textptr);
        return e;
      }
      e = displayfield_set_value(0, *(subwindows + CDSubBrowseDefaults), CD_EncodingDisply, textptr);

      free(textptr);
      if (e)
      {
        return e;
      }
    }
    else
    {
      RetError(make_no_memory_error(101)); //
    }
  }
  else
  {
    /* The encoding name could not be found in the menu structure */

    RetError(displayfield_set_value(0, *(subwindows + CDSubBrowseDefaults), CD_EncodingDisply, "Unknown encoding")); //
  }

  return NULL;
}

/*************************************************/
/* choices_encoding_button_handler()             */
/*                                               */
/* Opens the encoding window with appropriate    */
/* values for the choices dialogue.              */
/*************************************************/

static int choices_encoding_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;
  int  position[2];
  BBox box;
  WimpGetWindowStateBlock state;

  e = gadget_get_bbox(0, idb->self_id, idb->self_component, &box);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = window_get_wimp_handle(0, idb->self_id, &state.window_handle);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = wimp_get_window_state(&state);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  /* Set open coordinates of encoding menu to top left of encoding button */

  position[0] = coords_x_toscreen(box.xmax, (WimpRedrawWindowBlock*)&state);
  position[1] = coords_y_toscreen(box.ymax, (WimpRedrawWindowBlock*)&state);

  show_error_ret(toolbox_show_object(Toolbox_ShowObject_AsMenu,
                                     encoding_get_menuid(),
                                     Toolbox_ShowObject_TopLeft,
                                     position,
                                     choices_windowid,
                                     NULL));

  return 1;
}

/*************************************************/
/* choices_colour_button_handler()               */
/*                                               */
/* Opens a colour dialogue box with appropriate  */
/* settings for the current colour.              */
/*************************************************/

static int choices_colour_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;
  int  position[2];
  BBox box;
  WimpGetWindowStateBlock state;
  int colour[2];

  switch(idb->self_component)
  {
    case CD_BackColourBt: colour[0] = new_choices->background_colour; break;
    case CD_TextColourBt: colour[0] = new_choices->text_colour;       break;
    case CD_LinkColourBt: colour[0] = new_choices->link_colour;       break;
    case CD_UsedColourBt: colour[0] = new_choices->used_colour;       break;
    case CD_FolwColourBt: colour[0] = new_choices->followed_colour;   break;
    case CD_SlctColourBt: colour[0] = new_choices->selected_colour;   break;
    default:
    return 1;
    break;
  }

  colour[1] = 0;

  e = gadget_get_bbox(0, idb->self_id, idb->self_component, &box);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = window_get_wimp_handle(0, idb->self_id, &state.window_handle);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = wimp_get_window_state(&state);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  /* Set open coordinates of encoding menu to top left of encoding button */

  position[0] = coords_x_toscreen(box.xmax, (WimpRedrawWindowBlock*)&state);
  position[1] = coords_y_toscreen(box.ymax, (WimpRedrawWindowBlock*)&state);

  e = toolbox_create_object(0, "ColourDbox", &colourdbox_id);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = colourdbox_set_colour(0, colourdbox_id, colour);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  show_error_ret(toolbox_show_object(Toolbox_ShowObject_AsMenu,
                                     colourdbox_id,
                                     Toolbox_ShowObject_TopLeft,
                                     position,
                                     idb->self_id,
                                     idb->self_component));

  e = event_register_toolbox_handler(colourdbox_id, ColourDbox_DialogueCompleted, choices_colour_closed_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  e = event_register_toolbox_handler(colourdbox_id, ColourDbox_ColourSelected, choices_colour_selected_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  return 1;
}

/*************************************************/
/* choices_colour_closed_handler()               */
/*                                               */
/* Called when the colour dialogue box is closed */
/* deregisters all events attached to it and     */
/* deletes the dbox object.                      */
/*************************************************/

static int choices_colour_closed_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;

  e = event_deregister_toolbox_handler(idb->self_id, ColourDbox_DialogueCompleted, choices_colour_closed_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  e = event_deregister_toolbox_handler(colourdbox_id, ColourDbox_ColourSelected, choices_colour_selected_handler, NULL);
  if (e) {show_error_ret(e); return 1;}

  e = toolbox_delete_object(0, idb->self_id);
  if (e) {show_error_ret(e); return 1;}

  #ifdef TRACE
  Printf("Colour dbox deleted\n");
  #endif

  return 1;
}

/*************************************************/
/* choices_colour_closed_handler()               */
/*                                               */
/* Called when the a colour is selected in the   */
/* colour dialogue box.                          */
/* Sets appropriate fields in the new_choices    */
/* structure and updates the window to reflect   */
/* the new colour chosen.                        */
/*************************************************/

static int choices_colour_selected_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  ColourDboxColourSelectedEvent *cevent = (ColourDboxColourSelectedEvent*)event;

  switch(idb->parent_component)
  {
    case CD_BackColourBt: new_choices->background_colour = cevent->colour_block[0]; break;
    case CD_TextColourBt: new_choices->text_colour       = cevent->colour_block[0]; break;
    case CD_LinkColourBt: new_choices->link_colour       = cevent->colour_block[0]; break;
    case CD_UsedColourBt: new_choices->used_colour       = cevent->colour_block[0]; break;
    case CD_FolwColourBt: new_choices->followed_colour   = cevent->colour_block[0]; break;
    case CD_SlctColourBt: new_choices->selected_colour   = cevent->colour_block[0]; break;
    default:
    return 1;
    break;
  }

  show_error_ret(choices_colour_set_component(idb->parent_id, idb->parent_component-1, cevent->colour_block[0]));

  return 1;
}

/*************************************************/
/* choices_colour_closed_handler()               */
/*                                               */
/* Sets the validation string of a button to be  */
/* slabbed in and have the background colour     */
/* specified.                                    */
/*                                               */
/* Parameters: window ObjectId                   */
/*                                               */
/*             button ComponentId                */
/*                                               */
/*             colour                            */
/*************************************************/

static _kernel_oserror *choices_colour_set_component(ObjectId window, ComponentId component, int colour)
{
  char newvalidation[32];
  unsigned char *newcol;
  newcol = (unsigned char*)&colour;

  sprintf(newvalidation, "R2;C/%02.2x%02.2x%02.2x", *(newcol+3), *(newcol+2), *(newcol+1));

  return button_set_validation(0, window, component, newvalidation);
}

/*************************************************/
/* choices_display_button_handler()              */
/*                                               */
/* Opens the display menu with a value           */
/* appropriate to either the hotlist or history. */
/*************************************************/

static int choices_display_m_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;
  int  position[2];
  BBox box;
  WimpGetWindowStateBlock state;
  ObjectId display;
  int new_tick;

  e = gadget_get_bbox(0, idb->self_id, idb->self_component, &box);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = window_get_wimp_handle(0, idb->self_id, &state.window_handle);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = wimp_get_window_state(&state);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  /* Set open coordinates of display menu to top left of display button */

  position[0] = coords_x_toscreen(box.xmax, (WimpRedrawWindowBlock*)&state);
  position[1] = coords_y_toscreen(box.ymax, (WimpRedrawWindowBlock*)&state);

  e = toolbox_create_object(0, "ChDisplay", &display);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  switch(idb->self_component)
  {
    case CD_HlDispBt: new_tick = new_choices->hotlist_show; break;
    case CD_HiDispBt: new_tick = new_choices->show_urls;    break;
    default: new_tick = 0; break;
  }

  if (disp_ticked != new_tick)
  {
    if (disp_ticked != -1) menu_set_tick(0, display, disp_ticked, 0);
    menu_set_tick(0, display, new_tick, 1);
    disp_ticked = new_tick;
  }

  show_error_ret(toolbox_show_object(Toolbox_ShowObject_AsMenu,
                                     display,
                                     Toolbox_ShowObject_TopLeft,
                                     position,
                                     idb->self_id,
                                     idb->self_component));

  return 1;
}

/*************************************************/
/* choices_save_button_handler()                 */
/*                                               */
/* Opens the save menu with a value appropriate  */
/* to either the hotlist or history.             */
/*************************************************/

static int choices_save_m_button_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  _kernel_oserror *e;
  int  position[2];
  BBox box;
  WimpGetWindowStateBlock state;
  ObjectId display;
  int new_tick;

  e = gadget_get_bbox(0, idb->self_id, idb->self_component, &box);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = window_get_wimp_handle(0, idb->self_id, &state.window_handle);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  e = wimp_get_window_state(&state);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  /* Set open coordinates of display menu to top left of display button */

  position[0] = coords_x_toscreen(box.xmax, (WimpRedrawWindowBlock*)&state);
  position[1] = coords_y_toscreen(box.ymax, (WimpRedrawWindowBlock*)&state);

  e = toolbox_create_object(0, "ChSave", &display);
  if (e)
  {
    show_error_ret(e);
    return 1;
  }

  switch(idb->self_component)
  {
    case CD_HlSaveBt: new_tick = new_choices->save_hotlist; break;
    case CD_HiSaveBt: new_tick = new_choices->save_history; break;
    default: new_tick = 0; break;
  }

  if (save_ticked != new_tick)
  {
    if (save_ticked != -1) menu_set_tick(0, display, save_ticked, 0);
    menu_set_tick(0, display, new_tick, 1);
    save_ticked = new_tick;
  }

  show_error_ret(toolbox_show_object(Toolbox_ShowObject_AsMenu,
                                     display,
                                     Toolbox_ShowObject_TopLeft,
                                     position,
                                     idb->self_id,
                                     idb->self_component));

  return 1;
}

/*************************************************/
/* choices_set_save_field()                      */
/*                                               */
/* Sets the passed save display field            */
/* appropriately to reflect the passed state.    */
/*************************************************/

static _kernel_oserror * choices_set_save_field(ObjectId obj, ComponentId comp, int state)
{
  _kernel_oserror *e;
  ObjectId menu_id;
  int reqdsize;
  char *tempstring;

  #ifdef TRACE
    Printf("called: choices_set_display_field\n");
  #endif

  RetError(toolbox_create_object(0, "ChSave", &menu_id));

  RetError(menu_get_entry_text(0, menu_id, state, NULL, 0, &reqdsize));

  tempstring = malloc(reqdsize+1);
  if (!tempstring) return make_no_memory_error(100); //

  RetError(menu_get_entry_text(0, menu_id, state, tempstring, reqdsize+1, NULL));

  e = displayfield_set_value(0, obj, comp, tempstring);

  free(tempstring);

  return e;
}

/*************************************************/
/* choices_set_display_field()                   */
/*                                               */
/* Sets the passed display display field         */
/* appropriately to reflect the passed state.    */
/*************************************************/

static _kernel_oserror * choices_set_display_field(ObjectId obj, ComponentId comp, int state)
{
  _kernel_oserror *e;
  ObjectId menu_id;
  int reqdsize;
  char *tempstring;

  #ifdef TRACE
    Printf("called: choices_set_display_field\n");
  #endif

  RetError(toolbox_create_object(0, "ChDisplay", &menu_id));

  RetError(menu_get_entry_text(0, menu_id, state, NULL, 0, &reqdsize));

  tempstring = malloc(reqdsize+1);
  if (!tempstring) return make_no_memory_error(100); //

  RetError(menu_get_entry_text(0, menu_id, state, tempstring, reqdsize+1, NULL));

  e = displayfield_set_value(0, obj, comp, tempstring);

  free(tempstring);

  return e;
}

/*************************************************/
/* choices_display_m_click_handler()             */
/*                                               */
/*************************************************/

static int choices_display_m_click_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  if (disp_ticked != idb->self_component)
  {
    if (disp_ticked != -1) menu_set_tick(0, idb->self_id, disp_ticked, 0);
    menu_set_tick(0, idb->self_id, idb->self_component, 1);
    disp_ticked = idb->self_component;
  }

  switch(idb->parent_component)
  {
    case CD_HlDispBt:
    new_choices->hotlist_show = idb->self_component;
    break;
    case CD_HiDispBt:
    new_choices->show_urls    = idb->self_component;
    break;
  }

  choices_set_display_field(idb->parent_id, idb->parent_component - 1, idb->self_component);

  return 1;
}

/*************************************************/
/* choices_save_m_click_handler()                */
/*                                               */
/*************************************************/

static int choices_save_m_click_handler(int eventcode, ToolboxEvent * event, IdBlock * idb, void * handle)
{
  if (save_ticked != idb->self_component)
  {
    if (save_ticked != -1) menu_set_tick(0, idb->self_id, save_ticked, 0);
    menu_set_tick(0, idb->self_id, idb->self_component, 1);
    save_ticked = idb->self_component;
  }

  switch(idb->parent_component)
  {
    case CD_HlSaveBt:
    new_choices->save_hotlist = idb->self_component;
    break;
    case CD_HiSaveBt:
    new_choices->save_history = idb->self_component;
    break;
  }

  choices_set_save_field(idb->parent_id, idb->parent_component - 1, idb->self_component);

  return 1;
}