text: /*
   * 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,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   */
  
  /** \file
   * \ingroup spconsole
   */
  
  #include <stdio.h>
  #include <string.h>
  
  #include "MEM_guardedalloc.h"
  
  #include "BLI_blenlib.h"
  #include "BLI_utildefines.h"
  
  #include "BKE_context.h"
  #include "BKE_global.h"
  #include "BKE_screen.h"
  
  #include "ED_screen.h"
  #include "ED_space_api.h"
  
  #include "RNA_access.h"
  
  #include "WM_api.h"
  #include "WM_types.h"
  
  #include "UI_resources.h"
  #include "UI_view2d.h"
  
  #include "GPU_framebuffer.h"
  #include "console_intern.h"  // own include
  
  /* ******************** default callbacks for console space ***************** */
  
  static SpaceLink *console_new(const ScrArea *UNUSED(area), const Scene *UNUSED(scene))
  {
    ARegion *region;
    SpaceConsole *sconsole;
  
    sconsole = MEM_callocN(sizeof(SpaceConsole), "initconsole");
    sconsole->spacetype = SPACE_CONSOLE;
  
    sconsole->lheight = 14;
  
    /* header */
    region = MEM_callocN(sizeof(ARegion), "header for console");
  
    BLI_addtail(&sconsole->regionbase, region);
    region->regiontype = RGN_TYPE_HEADER;
    region->alignment = (U.uiflag & USER_HEADER_BOTTOM) ? RGN_ALIGN_BOTTOM : RGN_ALIGN_TOP;
  
    /* main region */
    region = MEM_callocN(sizeof(ARegion), "main region for text");
  
    BLI_addtail(&sconsole->regionbase, region);
    region->regiontype = RGN_TYPE_WINDOW;
  
    /* keep in sync with info */
    region->v2d.scroll |= (V2D_SCROLL_RIGHT);
    region->v2d.align |= V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_NEG_Y; /* align bottom left */
    region->v2d.keepofs |= V2D_LOCKOFS_X;
    region->v2d.keepzoom = (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y | V2D_LIMITZOOM | V2D_KEEPASPECT);
    region->v2d.keeptot = V2D_KEEPTOT_BOUNDS;
    region->v2d.minzoom = region->v2d.maxzoom = 1.0f;
  
    /* for now, aspect ratio should be maintained, and zoom is clamped within sane default limits */
    // region->v2d.keepzoom = (V2D_KEEPASPECT|V2D_LIMITZOOM);
  
    return (SpaceLink *)sconsole;
  }
  
  /* not spacelink itself */
  static void console_free(SpaceLink *sl)
  {
    SpaceConsole *sc = (SpaceConsole *)sl;
  
    while (sc->scrollback.first) {
      console_scrollback_free(sc, sc->scrollback.first);
    }
  
    while (sc->history.first) {
      console_history_free(sc, sc->history.first);
    }
  }
  
  /* spacetype; init callback */
  static void console_init(struct wmWindowManager *UNUSED(wm), ScrArea *UNUSED(sa))
  {
  }
  
  static SpaceLink *console_duplicate(SpaceLink *sl)
  {
    SpaceConsole *sconsolen = MEM_dupallocN(sl);
  
    /* clear or remove stuff from old */
  
    /* TODO - duplicate?, then we also need to duplicate the py namespace */
    BLI_listbase_clear(&sconsolen->scrollback);
    BLI_listbase_clear(&sconsolen->history);
  
    return (SpaceLink *)sconsolen;
  }
  
  /* add handlers, stuff you only do once or on area/region changes */
  static void console_main_region_init(wmWindowManager *wm, ARegion *region)
  {
    wmKeyMap *keymap;
    ListBase *lb;
  
    const float prev_y_min = region->v2d.cur.ymin; /* so re-sizing keeps the cursor visible */
  
    /* force it on init, for old files, until it becomes config */
    region->v2d.scroll = (V2D_SCROLL_RIGHT);
  
    UI_view2d_region_reinit(&region->v2d, V2D_COMMONVIEW_CUSTOM, region->winx, region->winy);
  
    /* always keep the bottom part of the view aligned, less annoying */
    if (prev_y_min != region->v2d.cur.ymin) {
      const float cur_y_range = BLI_rctf_size_y(&region->v2d.cur);
      region->v2d.cur.ymin = prev_y_min;
      region->v2d.cur.ymax = prev_y_min + cur_y_range;
    }
  
    /* own keymap */
    keymap = WM_keymap_ensure(wm->defaultconf, "Console", SPACE_CONSOLE, 0);
    WM_event_add_keymap_handler_v2d_mask(&region->handlers, keymap);
  
    /* add drop boxes */
    lb = WM_dropboxmap_find("Console", SPACE_CONSOLE, RGN_TYPE_WINDOW);
  
    WM_event_add_dropbox_handler(&region->handlers, lb);
  }
  
  /* same as 'text_cursor' */
  static void console_cursor(wmWindow *win, ScrArea *UNUSED(sa), ARegion *region)
  {
    int wmcursor = WM_CURSOR_TEXT_EDIT;
    const wmEvent *event = win->eventstate;
    if (UI_view2d_mouse_in_scrollers(region, &region->v2d, event->x, event->y)) {
      wmcursor = WM_CURSOR_DEFAULT;
    }
  
    WM_cursor_set(win, wmcursor);
  }
  
  /* ************* dropboxes ************* */
  
  static bool id_drop_poll(bContext *UNUSED(C),
                           wmDrag *drag,
                           const wmEvent *UNUSED(event),
                           const char **UNUSED(tooltip))
  {
    return WM_drag_ID(drag, 0) != NULL;
  }
  
  static void id_drop_copy(wmDrag *drag, wmDropBox *drop)
  {
    ID *id = WM_drag_ID(drag, 0);
  
    /* copy drag path to properties */
    char *text = RNA_path_full_ID_py(G_MAIN, id);
    RNA_string_set(drop->ptr, "text", text);
    MEM_freeN(text);
  }
  
  static bool path_drop_poll(bContext *UNUSED(C),
                             wmDrag *drag,
                             const wmEvent *UNUSED(event),
                             const char **UNUSED(tooltip))
  {
    return (drag->type == WM_DRAG_PATH);
  }
  
  static void path_drop_copy(wmDrag *drag, wmDropBox *drop)
  {
    char pathname[FILE_MAX + 2];
    BLI_snprintf(pathname, sizeof(pathname), "\"%s\"", drag->path);
    RNA_string_set(drop->ptr, "text", pathname);
  }
  
  /* this region dropbox definition */
  static void console_dropboxes(void)
  {
    ListBase *lb = WM_dropboxmap_find("Console", SPACE_CONSOLE, RGN_TYPE_WINDOW);
  
    WM_dropbox_add(lb, "CONSOLE_OT_insert", id_drop_poll, id_drop_copy);
    WM_dropbox_add(lb, "CONSOLE_OT_insert", path_drop_poll, path_drop_copy);
  }
  
  /* ************* end drop *********** */
  
  static void console_main_region_draw(const bContext *C, ARegion *region)
  {
    /* draw entirely, view changes should be handled here */
    SpaceConsole *sc = CTX_wm_space_console(C);
    View2D *v2d = &region->v2d;
    View2DScrollers *scrollers;
  
    if (BLI_listbase_is_empty(&sc->scrollback)) {
      WM_operator_name_call((bContext *)C, "CONSOLE_OT_banner", WM_OP_EXEC_DEFAULT, NULL);
    }
  
    /* clear and setup matrix */
    UI_ThemeClearColor(TH_BACK);
    GPU_clear(GPU_COLOR_BIT);
  
    /* worlks best with no view2d matrix set */
    UI_view2d_view_ortho(v2d);
  
    /* data... */
  
    console_history_verify(C); /* make sure we have some command line */
    console_textview_main(sc, region);
  
    /* reset view matrix */
    UI_view2d_view_restore(C);
  
    /* scrollers */
    scrollers = UI_view2d_scrollers_calc(v2d, NULL);
    UI_view2d_scrollers_draw(v2d, scrollers);
    UI_view2d_scrollers_free(scrollers);
  }
  
  static void console_operatortypes(void)
  {
    /* console_ops.c */
    WM_operatortype_append(CONSOLE_OT_move);
    WM_operatortype_append(CONSOLE_OT_delete);
    WM_operatortype_append(CONSOLE_OT_insert);
  
    WM_operatortype_append(CONSOLE_OT_indent);
    WM_operatortype_append(CONSOLE_OT_indent_or_autocomplete);
    WM_operatortype_append(CONSOLE_OT_unindent);
  
    /* for use by python only */
    WM_operatortype_append(CONSOLE_OT_history_append);
    WM_operatortype_append(CONSOLE_OT_scrollback_append);
  
    WM_operatortype_append(CONSOLE_OT_clear);
    WM_operatortype_append(CONSOLE_OT_clear_line);
    WM_operatortype_append(CONSOLE_OT_history_cycle);
    WM_operatortype_append(CONSOLE_OT_copy);
    WM_operatortype_append(CONSOLE_OT_paste);
    WM_operatortype_append(CONSOLE_OT_select_set);
    WM_operatortype_append(CONSOLE_OT_select_word);
  }
  
  static void console_keymap(struct wmKeyConfig *keyconf)
  {
    WM_keymap_ensure(keyconf, "Console", SPACE_CONSOLE, 0);
  }
  
  /****************** header region ******************/
  
  /* add handlers, stuff you only do once or on area/region changes */
  static void console_header_region_init(wmWindowManager *UNUSED(wm), ARegion *region)
  {
    ED_region_header_init(region);
  }
  
  static void console_header_region_draw(const bContext *C, ARegion *region)
  {
    ED_region_header(C, region);
  }
  
  static void console_main_region_listener(wmWindow *UNUSED(win),
                                           ScrArea *sa,
                                           ARegion *region,
                                           wmNotifier *wmn,
                                           const Scene *UNUSED(scene))
  {
    // SpaceInfo *sinfo = sa->spacedata.first;
  
    /* context changes */
    switch (wmn->category) {
      case NC_SPACE: {
        if (wmn->data == ND_SPACE_CONSOLE) {
          if (wmn->action == NA_EDITED) {
            if ((wmn->reference && sa) && (wmn->reference == sa->spacedata.first)) {
              /* we've modified the geometry (font size), re-calculate rect */
              console_textview_update_rect(wmn->reference, region);
              ED_region_tag_redraw(region);
            }
          }
          else {
            /* generic redraw request */
            ED_region_tag_redraw(region);
          }
        }
        break;
      }
    }
  }
  
  /* only called once, from space/spacetypes.c */
  void ED_spacetype_console(void)
  {
    SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype console");
    ARegionType *art;
  
    st->spaceid = SPACE_CONSOLE;
    strncpy(st->name, "Console", BKE_ST_MAXNAME);
  
    st->new = console_new;
    st->free = console_free;
    st->init = console_init;
    st->duplicate = console_duplicate;
    st->operatortypes = console_operatortypes;
    st->keymap = console_keymap;
    st->dropboxes = console_dropboxes;
  
    /* regions: main window */
    art = MEM_callocN(sizeof(ARegionType), "spacetype console region");
    art->regionid = RGN_TYPE_WINDOW;
    art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_VIEW2D;
  
    art->init = console_main_region_init;
    art->draw = console_main_region_draw;
    art->cursor = console_cursor;
    art->event_cursor = true;
    art->listener = console_main_region_listener;
  
    BLI_addhead(&st->regiontypes, art);
  
    /* regions: header */
    art = MEM_callocN(sizeof(ARegionType), "spacetype console region");
    art->regionid = RGN_TYPE_HEADER;
    art->prefsizey = HEADERY;
    art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_VIEW2D | ED_KEYMAP_HEADER;
  
    art->init = console_header_region_init;
    art->draw = console_header_region_draw;
  
    BLI_addhead(&st->regiontypes, art);
  
    BKE_spacetype_register(st);
  }
  