editfont.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

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

#ifndef WIN32 
#include <unistd.h>
#else
#include <io.h>
#endif

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"

#include "DNA_curve_types.h"
#include "DNA_object_types.h"
#include "DNA_vfont_types.h"
#include "DNA_scene_types.h"
#include "DNA_text_types.h"

#include "BKE_context.h"
#include "BKE_curve.h"
#include "BKE_depsgraph.h"
#include "BKE_font.h"
#include "BKE_library.h"
#include "BKE_object.h"
#include "BKE_report.h"

#include "RNA_access.h"
#include "RNA_define.h"

#include "WM_api.h"
#include "WM_types.h"

#include "ED_curve.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_util.h"

#include "UI_interface.h"

#include "curve_intern.h"

#define MAXTEXT 32766

/************************* utilities ******************************/

static char findaccent(char char1, unsigned int code)
{
    char new= 0;
    
    if(char1=='a') {
        if(code=='`') new= 224;
        else if(code==39) new= 225;
        else if(code=='^') new= 226;
        else if(code=='~') new= 227;
        else if(code=='"') new= 228;
        else if(code=='o') new= 229;
        else if(code=='e') new= 230;
        else if(code=='-') new= 170;
    }
    else if(char1=='c') {
        if(code==',') new= 231;
        if(code=='|') new= 162;
    }
    else if(char1=='e') {
        if(code=='`') new= 232;
        else if(code==39) new= 233;
        else if(code=='^') new= 234;
        else if(code=='"') new= 235;
    }
    else if(char1=='i') {
        if(code=='`') new= 236;
        else if(code==39) new= 237;
        else if(code=='^') new= 238;
        else if(code=='"') new= 239;
    }
    else if(char1=='n') {
        if(code=='~') new= 241;
    }
    else if(char1=='o') {
        if(code=='`') new= 242;
        else if(code==39) new= 243;
        else if(code=='^') new= 244;
        else if(code=='~') new= 245;
        else if(code=='"') new= 246;
        else if(code=='/') new= 248;
        else if(code=='-') new= 186;
        else if(code=='e') new= 143;
    }
    else if(char1=='s') {
        if(code=='s') new= 167;
    }
    else if(char1=='u') {
        if(code=='`') new= 249;
        else if(code==39) new= 250;
        else if(code=='^') new= 251;
        else if(code=='"') new= 252;
    }
    else if(char1=='y') {
        if(code==39) new= 253;
        else if(code=='"') new= 255;
    }
    else if(char1=='A') {
        if(code=='`') new= 192;
        else if(code==39) new= 193;
        else if(code=='^') new= 194;
        else if(code=='~') new= 195;
        else if(code=='"') new= 196;
        else if(code=='o') new= 197;
        else if(code=='e') new= 198;
    }
    else if(char1=='C') {
        if(code==',') new= 199;
    }
    else if(char1=='E') {
        if(code=='`') new= 200;
        else if(code==39) new= 201;
        else if(code=='^') new= 202;
        else if(code=='"') new= 203;
    }
    else if(char1=='I') {
        if(code=='`') new= 204;
        else if(code==39) new= 205;
        else if(code=='^') new= 206;
        else if(code=='"') new= 207;
    }
    else if(char1=='N') {
        if(code=='~') new= 209;
    }
    else if(char1=='O') {
        if(code=='`') new= 210;
        else if(code==39) new= 211;
        else if(code=='^') new= 212;
        else if(code=='~') new= 213;
        else if(code=='"') new= 214;
        else if(code=='/') new= 216;
        else if(code=='e') new= 141;
    }
    else if(char1=='U') {
        if(code=='`') new= 217;
        else if(code==39) new= 218;
        else if(code=='^') new= 219;
        else if(code=='"') new= 220;
    }
    else if(char1=='Y') {
        if(code==39) new= 221;
    }
    else if(char1=='1') {
        if(code=='4') new= 188;
        if(code=='2') new= 189;
    }
    else if(char1=='3') {
        if(code=='4') new= 190;
    }
    else if(char1==':') {
        if(code=='-') new= 247;
    }
    else if(char1=='-') {
        if(code==':') new= 247;
        if(code=='|') new= 135;
        if(code=='+') new= 177;
    }
    else if(char1=='|') {
        if(code=='-') new= 135;
        if(code=='=') new= 136;
    }
    else if(char1=='=') {
        if(code=='|') new= 136;
    }
    else if(char1=='+') {
        if(code=='-') new= 177;
    }
    
    if(new) return new;
    else return char1;
}


static void update_string(Curve *cu)
{
    EditFont *ef= cu->editfont;
    int len;

    // Free the old curve string    
    MEM_freeN(cu->str);

    // Calculate the actual string length in UTF-8 variable characters
    len = BLI_wstrlen_utf8(ef->textbuf);

    // Alloc memory for UTF-8 variable char length string
    cu->str = MEM_callocN(len + sizeof(wchar_t), "str");

    // Copy the wchar to UTF-8
    BLI_strncpy_wchar_as_utf8(cu->str, ef->textbuf, len + 1);
}

static int insert_into_textbuf(Object *obedit, uintptr_t c)
{
    Curve *cu= obedit->data;
    
    if(cu->len<MAXTEXT-1) {
        EditFont *ef= cu->editfont;
        int x;

        for(x= cu->len; x>cu->pos; x--) ef->textbuf[x]= ef->textbuf[x-1];
        for(x= cu->len; x>cu->pos; x--) ef->textbufinfo[x]= ef->textbufinfo[x-1];       
        ef->textbuf[cu->pos]= c;
        ef->textbufinfo[cu->pos] = cu->curinfo;
        ef->textbufinfo[cu->pos].kern = 0;
        ef->textbufinfo[cu->pos].mat_nr = obedit->actcol;
                    
        cu->pos++;
        cu->len++;
        ef->textbuf[cu->len]='\0';

        update_string(cu);

        return 1;
    }
    else
        return 0;
}

static void text_update_edited(bContext *C, Scene *scene, Object *obedit, int recalc, int mode)
{
    struct Main *bmain= CTX_data_main(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    cu->curinfo = ef->textbufinfo[cu->pos?cu->pos-1:0];
    
    if(obedit->totcol > 0) {
        obedit->actcol= ef->textbufinfo[cu->pos?cu->pos-1:0].mat_nr;

        /* since this array is calloc'd, it can be 0 even though we try ensure
         * (mat_nr > 0) almost everywhere */
        if (obedit->actcol < 1) {
            obedit->actcol= 1;
        }
    }

    if(mode == FO_EDIT)
        update_string(cu);

    BKE_text_to_curve(bmain, scene, obedit, mode);

    if(recalc)
        DAG_id_tag_update(obedit->data, 0);
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, obedit->data);
}

/********************** insert lorem operator *********************/

static int insert_lorem_exec(bContext *C, wmOperator *UNUSED(op))
{
    Object *obedit= CTX_data_edit_object(C);
    const char *p, *p2;
    int i;
    static const char *lastlorem;
    
    if(lastlorem)
        p= lastlorem;
    else
        p= ED_lorem;
    
    i= rand()/(RAND_MAX/6)+4;   
        
    for(p2=p; *p2 && i; p2++) {
        insert_into_textbuf(obedit, *p2);

        if(*p2=='.')
            i--;
    }

    lastlorem = p2+1;
    if(strlen(lastlorem)<5)
        lastlorem = ED_lorem;
    
    insert_into_textbuf(obedit, '\n');
    insert_into_textbuf(obedit, '\n');  

    DAG_id_tag_update(obedit->data, 0);
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, obedit->data);

    return OPERATOR_FINISHED;
}

void FONT_OT_insert_lorem(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Insert Lorem";
    ot->description= "Insert placeholder text";
    ot->idname= "FONT_OT_insert_lorem";
    
    /* api callbacks */
    ot->exec= insert_lorem_exec;
    ot->poll= ED_operator_editfont;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************* paste file operator ********************/

/* note this handles both ascii and utf8 unicode, previously
 * there were 3 functions that did effectively the same thing. */

static int paste_file(bContext *C, ReportList *reports, const char *filename)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    FILE *fp;
    int filelen;
    char *strp;

    fp= fopen(filename, "r");

    if(!fp) {
        if(reports)
            BKE_reportf(reports, RPT_ERROR, "Failed to open file %s", filename);
        return OPERATOR_CANCELLED;
    }

    fseek(fp, 0L, SEEK_END);
    filelen = ftell(fp);
    fseek(fp, 0L, SEEK_SET);

    strp= MEM_callocN(filelen+4, "tempstr");

    // fread() instead of read(), because windows read() converts text
    // to DOS \r\n linebreaks, causing double linebreaks in the 3d text
    filelen = fread(strp, 1, filelen, fp);
    fclose(fp);
    strp[filelen]= 0;

    if(cu->len+filelen<MAXTEXT) {
        int tmplen;
        wchar_t *mem = MEM_callocN((sizeof(wchar_t)*filelen)+(4*sizeof(wchar_t)), "temporary");
        tmplen = BLI_strncpy_wchar_from_utf8(mem, strp, filelen + 1);
        wcscat(ef->textbuf, mem);
        MEM_freeN(mem);
        cu->len += tmplen;
        cu->pos= cu->len;
    }
    MEM_freeN(strp);

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

static int paste_file_exec(bContext *C, wmOperator *op)
{
    char *path;
    int retval;
    
    path= RNA_string_get_alloc(op->ptr, "filepath", NULL, 0);
    retval= paste_file(C, op->reports, path);
    MEM_freeN(path);

    return retval;
}

static int paste_file_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
    if(RNA_struct_property_is_set(op->ptr, "filepath"))
        return paste_file_exec(C, op);

    WM_event_add_fileselect(C, op); 

    return OPERATOR_RUNNING_MODAL;
}

void FONT_OT_file_paste(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Paste File";
    ot->description= "Paste contents from file";
    ot->idname= "FONT_OT_file_paste";
    
    /* api callbacks */
    ot->exec= paste_file_exec;
    ot->invoke= paste_file_invoke;
    ot->poll= ED_operator_editfont;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    WM_operator_properties_filesel(ot, FOLDERFILE|TEXTFILE, FILE_SPECIAL, FILE_OPENFILE, WM_FILESEL_FILEPATH);
}

/******************* text to object operator ********************/

static void txt_add_object(bContext *C, TextLine *firstline, int totline, float offset[3])
{
    Scene *scene= CTX_data_scene(C);
    Curve *cu;
    Object *obedit;
    Base *base;
    struct TextLine *tmp;
    int nchars = 0, a;
    float rot[3] = {0.f, 0.f, 0.f};
    
    obedit= add_object(scene, OB_FONT);
    base= scene->basact;

    
    ED_object_base_init_transform(C, base, NULL, rot); /* seems to assume view align ? TODO - look into this, could be an operator option */
    where_is_object(scene, obedit);

    obedit->loc[0] += offset[0];
    obedit->loc[1] += offset[1];
    obedit->loc[2] += offset[2];

    cu= obedit->data;
    cu->vfont= get_builtin_font();
    cu->vfont->id.us++;

    for(tmp=firstline, a=0; cu->len<MAXTEXT && a<totline; tmp=tmp->next, a++)
        nchars += strlen(tmp->line) + 1;

    if(cu->str) MEM_freeN(cu->str);
    if(cu->strinfo) MEM_freeN(cu->strinfo); 

    cu->str= MEM_callocN(nchars+4, "str");
    cu->strinfo= MEM_callocN((nchars+4)*sizeof(CharInfo), "strinfo");

    cu->str[0]= '\0';
    cu->len= 0;
    cu->pos= 0;
    
    for(tmp=firstline, a=0; cu->len<MAXTEXT && a<totline; tmp=tmp->next, a++) {
        strcat(cu->str, tmp->line);
        cu->len+= strlen(tmp->line);

        if(tmp->next) {
            strcat(cu->str, "\n");
            cu->len++;
        }

        cu->pos= cu->len;
    }

    WM_event_add_notifier(C, NC_OBJECT|NA_ADDED, obedit);
}

void ED_text_to_object(bContext *C, Text *text, int split_lines)
{
    RegionView3D *rv3d= CTX_wm_region_view3d(C);
    TextLine *line;
    float offset[3];
    int linenum= 0;

    if(!text || !text->lines.first) return;

    if(split_lines) {
        for(line=text->lines.first; line; line=line->next) {
            /* skip lines with no text, but still make space for them */
            if(line->line[0] == '\0') {
                linenum++;
                continue;
            }
    
            /* do the translation */
            offset[0] = 0;
            offset[1] = -linenum;
            offset[2] = 0;
    
            if(rv3d)
                mul_mat3_m4_v3(rv3d->viewinv, offset);

            txt_add_object(C, line, 1, offset);

            linenum++;
        }
    }
    else {
        offset[0]= 0.0f;
        offset[1]= 0.0f;
        offset[2]= 0.0f;

        txt_add_object(C, text->lines.first, BLI_countlist(&text->lines), offset);
    }
}

/********************** utilities ***************************/

static short next_word(Curve *cu)
{
    short s;
    for(s=cu->pos; (cu->str[s]) && (cu->str[s]!=' ') && (cu->str[s]!='\n') &&
                    (cu->str[s]!=1) && (cu->str[s]!='\r'); s++);
    if(cu->str[s]) return(s+1); else return(s);
}

static short prev_word(Curve *cu)
{
    short s;
    
    if(cu->pos==0) return(0);
    for(s=cu->pos-2; (cu->str[s]) && (cu->str[s]!=' ') && (cu->str[s]!='\n') &&
                    (cu->str[s]!=1) && (cu->str[s]!='\r'); s--);
    if(cu->str[s]) return(s+1); else return(s);
}

static int kill_selection(Object *obedit, int ins)  /* 1 == new character */
{
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int selend, selstart, direction;
    int offset = 0;
    int getfrom;

    direction = BKE_font_getselection(obedit, &selstart, &selend);
    if(direction) {
        int size;
        if(ins) offset = 1;
        if(cu->pos >= selstart) cu->pos = selstart+offset;
        if((direction == -1) && ins) {
            selstart++;
            selend++;
        }
        getfrom = selend+offset;
        if(ins==0) getfrom++;
        size = (cu->len * sizeof(wchar_t)) - (selstart * sizeof(wchar_t)) + (offset*sizeof(wchar_t));
        memmove(ef->textbuf+selstart, ef->textbuf+getfrom, size);
        memmove(ef->textbufinfo+selstart, ef->textbufinfo+getfrom, ((cu->len-selstart)+offset)*sizeof(CharInfo));
        cu->len -= (selend-selstart)+offset;
        cu->selstart = cu->selend = 0;
    }

    return(direction);
}

/******************* set style operator ********************/

static EnumPropertyItem style_items[]= {
    {CU_CHINFO_BOLD, "BOLD", 0, "Bold", ""},
    {CU_CHINFO_ITALIC, "ITALIC", 0, "Italic", ""},
    {CU_CHINFO_UNDERLINE, "UNDERLINE", 0, "Underline", ""},
    {CU_CHINFO_SMALLCAPS, "SMALL_CAPS", 0, "Small Caps", ""},
    {0, NULL, 0, NULL, NULL}};

static int set_style(bContext *C, const int style, const int clear)
{
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int i, selstart, selend;

    if(!BKE_font_getselection(obedit, &selstart, &selend))
        return OPERATOR_CANCELLED;

    for(i=selstart; i<=selend; i++) {
        if(clear)
            ef->textbufinfo[i].flag &= ~style;
        else
            ef->textbufinfo[i].flag |= style;
    }

    DAG_id_tag_update(obedit->data, 0);
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, obedit->data);

    return OPERATOR_FINISHED;
}

static int set_style_exec(bContext *C, wmOperator *op)
{
    const int style= RNA_enum_get(op->ptr, "style");
    const int clear= RNA_boolean_get(op->ptr, "clear");

    return set_style(C, style, clear);
}

void FONT_OT_style_set(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Set Style";
    ot->description= "Set font style";
    ot->idname= "FONT_OT_style_set";
    
    /* api callbacks */
    ot->exec= set_style_exec;
    ot->poll= ED_operator_editfont;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "style", style_items, CU_CHINFO_BOLD, "Style", "Style to set selection to");
    RNA_def_boolean(ot->srna, "clear", 0, "Clear", "Clear style rather than setting it");
}

/******************* toggle style operator ********************/

static int toggle_style_exec(bContext *C, wmOperator *op)
{
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    int style, clear, selstart, selend;

    if(!BKE_font_getselection(obedit, &selstart, &selend))
        return OPERATOR_CANCELLED;
    
    style= RNA_enum_get(op->ptr, "style");

    cu->curinfo.flag ^= style;
    clear= (cu->curinfo.flag & style) == 0;

    return set_style(C, style, clear);
}

void FONT_OT_style_toggle(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Toggle Style";
    ot->description= "Toggle font style";
    ot->idname= "FONT_OT_style_toggle";
    
    /* api callbacks */
    ot->exec= toggle_style_exec;
    ot->poll= ED_operator_editfont;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "style", style_items, CU_CHINFO_BOLD, "Style", "Style to set selection to");
}

/******************* copy text operator ********************/

static void copy_selection(Object *obedit)
{
    int selstart, selend;
    
    if(BKE_font_getselection(obedit, &selstart, &selend)) {
        Curve *cu= obedit->data;
        EditFont *ef= cu->editfont;
        
        memcpy(ef->copybuf, ef->textbuf+selstart, ((selend-selstart)+1)*sizeof(wchar_t));
        ef->copybuf[(selend-selstart)+1]=0;
        memcpy(ef->copybufinfo, ef->textbufinfo+selstart, ((selend-selstart)+1)*sizeof(CharInfo));  
    }
}

static int copy_text_exec(bContext *C, wmOperator *UNUSED(op))
{
    Object *obedit= CTX_data_edit_object(C);

    copy_selection(obedit);

    return OPERATOR_FINISHED;
}

void FONT_OT_text_copy(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Copy Text";
    ot->description= "Copy selected text to clipboard";
    ot->idname= "FONT_OT_text_copy";
    
    /* api callbacks */
    ot->exec= copy_text_exec;
    ot->poll= ED_operator_editfont;
}

/******************* cut text operator ********************/

static int cut_text_exec(bContext *C, wmOperator *UNUSED(op))
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    int selstart, selend;

    if(!BKE_font_getselection(obedit, &selstart, &selend))
        return OPERATOR_CANCELLED;

    copy_selection(obedit);
    kill_selection(obedit, 0);

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_text_cut(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Cut Text";
    ot->description= "Cut selected text to clipboard";
    ot->idname= "FONT_OT_text_cut";
    
    /* api callbacks */
    ot->exec= cut_text_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************* paste text operator ********************/

static int paste_selection(Object *obedit, ReportList *reports)
{
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int len= wcslen(ef->copybuf);

    // Verify that the copy buffer => [copy buffer len] + cu->len < MAXTEXT
    if(cu->len + len <= MAXTEXT) {
        if(len) {   
            int size = (cu->len * sizeof(wchar_t)) - (cu->pos*sizeof(wchar_t)) + sizeof(wchar_t);
            memmove(ef->textbuf+cu->pos+len, ef->textbuf+cu->pos, size);
            memcpy(ef->textbuf+cu->pos, ef->copybuf, len * sizeof(wchar_t));
        
            memmove(ef->textbufinfo+cu->pos+len, ef->textbufinfo+cu->pos, (cu->len-cu->pos+1)*sizeof(CharInfo));
            memcpy(ef->textbufinfo+cu->pos, ef->copybufinfo, len*sizeof(CharInfo)); 
        
            cu->len += len;
            cu->pos += len;

            return 1;
        }
    }
    else
        BKE_report(reports, RPT_WARNING, "Text too long");
    
    return 0;
}

static int paste_text_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);

    if(!paste_selection(obedit, op->reports))
        return OPERATOR_CANCELLED;

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_text_paste(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Paste Text";
    ot->description= "Paste text from clipboard";
    ot->idname= "FONT_OT_text_paste";
    
    /* api callbacks */
    ot->exec= paste_text_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/************************ move operator ************************/

static EnumPropertyItem move_type_items[]= {
    {LINE_BEGIN, "LINE_BEGIN", 0, "Line Begin", ""},
    {LINE_END, "LINE_END", 0, "Line End", ""},
    {PREV_CHAR, "PREVIOUS_CHARACTER", 0, "Previous Character", ""},
    {NEXT_CHAR, "NEXT_CHARACTER", 0, "Next Character", ""},
    {PREV_WORD, "PREVIOUS_WORD", 0, "Previous Word", ""},
    {NEXT_WORD, "NEXT_WORD", 0, "Next Word", ""},
    {PREV_LINE, "PREVIOUS_LINE", 0, "Previous Line", ""},
    {NEXT_LINE, "NEXT_LINE", 0, "Next Line", ""},
    {PREV_PAGE, "PREVIOUS_PAGE", 0, "Previous Page", ""},
    {NEXT_PAGE, "NEXT_PAGE", 0, "Next Page", ""},
    {0, NULL, 0, NULL, NULL}};

static int move_cursor(bContext *C, int type, int select)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int cursmove= -1;

    switch(type) {
        case LINE_BEGIN:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            while(cu->pos>0) {
                if(ef->textbuf[cu->pos-1]=='\n') break;
                if(ef->textbufinfo[cu->pos-1].flag & CU_CHINFO_WRAP) break;             
                cu->pos--;
            }       
            cursmove=FO_CURS;
            break;
            
        case LINE_END:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;        
            while(cu->pos<cu->len) {
                if(ef->textbuf[cu->pos]==0) break;
                if(ef->textbuf[cu->pos]=='\n') break;
                if(ef->textbufinfo[cu->pos].flag & CU_CHINFO_WRAP ) break;
                cu->pos++;
            }
            cursmove=FO_CURS;
            break;

        case PREV_WORD:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cu->pos= prev_word(cu);
            cursmove= FO_CURS;
            break;

        case NEXT_WORD:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cu->pos= next_word(cu);
            cursmove= FO_CURS;              
            break;

        case PREV_CHAR:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cu->pos--;
            cursmove=FO_CURS;
            break;

        case NEXT_CHAR: 
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cu->pos++;
            cursmove= FO_CURS;              

            break;

        case PREV_LINE:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cursmove=FO_CURSUP;
            break;
            
        case NEXT_LINE:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cursmove= FO_CURSDOWN;
            break;

        case PREV_PAGE:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cursmove=FO_PAGEUP;
            break;

        case NEXT_PAGE:
            if((select) && (cu->selstart==0)) cu->selstart = cu->selend = cu->pos+1;
            cursmove=FO_PAGEDOWN;
            break;
    }
        
    if(cursmove == -1)
        return OPERATOR_CANCELLED;

    if(select == 0) {
        if(cu->selstart) {
            struct Main *bmain= CTX_data_main(C);
            cu->selstart = cu->selend = 0;
            update_string(cu);
            BKE_text_to_curve(bmain, scene, obedit, FO_SELCHANGE);
        }
    }

    if(cu->pos>cu->len) cu->pos= cu->len;
    else if(cu->pos>=MAXTEXT) cu->pos= MAXTEXT;
    else if(cu->pos<0) cu->pos= 0;

    text_update_edited(C, scene, obedit, select, cursmove);

    if(select)
        cu->selend = cu->pos;

    return OPERATOR_FINISHED;
}

static int move_exec(bContext *C, wmOperator *op)
{
    int type= RNA_enum_get(op->ptr, "type");

    return move_cursor(C, type, 0);
}

void FONT_OT_move(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Move Cursor";
    ot->description= "Move cursor to position type";
    ot->idname= "FONT_OT_move";
    
    /* api callbacks */
    ot->exec= move_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "type", move_type_items, LINE_BEGIN, "Type", "Where to move cursor to");
}

/******************* move select operator ********************/

static int move_select_exec(bContext *C, wmOperator *op)
{
    int type= RNA_enum_get(op->ptr, "type");

    return move_cursor(C, type, 1);
}

void FONT_OT_move_select(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Move Select";
    ot->description= "Make selection from current cursor position to new cursor position type";
    ot->idname= "FONT_OT_move_select";
    
    /* api callbacks */
    ot->exec= move_select_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "type", move_type_items, LINE_BEGIN, "Type", "Where to move cursor to, to make a selection");
}

/************************* change spacing **********************/

static int change_spacing_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int kern, delta= RNA_int_get(op->ptr, "delta");

    kern = ef->textbufinfo[cu->pos-1].kern;
    kern += delta;
    CLAMP(kern, -20, 20);

    if(ef->textbufinfo[cu->pos-1].kern == kern)
        return OPERATOR_CANCELLED;

    ef->textbufinfo[cu->pos-1].kern = kern;

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_change_spacing(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Change Spacing";
    ot->description= "Change font spacing";
    ot->idname= "FONT_OT_change_spacing";
    
    /* api callbacks */
    ot->exec= change_spacing_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_int(ot->srna, "delta", 1, -20, 20, "Delta", "Amount to decrease or increase character spacing with", -20, 20);
}

/************************* change character **********************/

static int change_character_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int character, delta= RNA_int_get(op->ptr, "delta");

    if(cu->pos <= 0)
        return OPERATOR_CANCELLED;

    character= ef->textbuf[cu->pos - 1];
    character += delta;
    CLAMP(character, 0, 255);

    if(character == ef->textbuf[cu->pos - 1])
        return OPERATOR_CANCELLED;

    ef->textbuf[cu->pos - 1]= character;

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_change_character(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Change Character";
    ot->description= "Change font character code";
    ot->idname= "FONT_OT_change_character";
    
    /* api callbacks */
    ot->exec= change_character_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_int(ot->srna, "delta", 1, -255, 255, "Delta", "Number to increase or decrease character code with", -255, 255);
}

/******************* line break operator ********************/

static int line_break_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    const int ctrl= RNA_boolean_get(op->ptr, "ctrl");

    if(ctrl) {
        insert_into_textbuf(obedit, 1);
        if(ef->textbuf[cu->pos]!='\n')
            insert_into_textbuf(obedit, '\n');
    }
    else
        insert_into_textbuf(obedit, '\n');

    cu->selstart = cu->selend = 0;

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_line_break(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Line Break";
    ot->description= "Insert line break at cursor position";
    ot->idname= "FONT_OT_line_break";
    
    /* api callbacks */
    ot->exec= line_break_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_boolean(ot->srna, "ctrl", 0, "Ctrl", ""); // XXX what is this?
}

/******************* delete operator **********************/

static EnumPropertyItem delete_type_items[]= {
    {DEL_ALL, "ALL", 0, "All", ""},
    {DEL_NEXT_CHAR, "NEXT_CHARACTER", 0, "Next Character", ""},
    {DEL_PREV_CHAR, "PREVIOUS_CHARACTER", 0, "Previous Character", ""},
    {DEL_SELECTION, "SELECTION", 0, "Selection", ""},
    {DEL_NEXT_SEL, "NEXT_OR_SELECTION", 0, "Next or Selection", ""},
    {DEL_PREV_SEL, "PREVIOUS_OR_SELECTION", 0, "Previous or Selection", ""},
    {0, NULL, 0, NULL, NULL}};

static int delete_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    int x, selstart, selend, type= RNA_enum_get(op->ptr, "type");

    if(cu->len == 0)
        return OPERATOR_CANCELLED;

    if(BKE_font_getselection(obedit, &selstart, &selend)) {
        if(type == DEL_NEXT_SEL) type= DEL_SELECTION;
        else if(type == DEL_PREV_SEL) type= DEL_SELECTION;
    }
    else {
        if(type == DEL_NEXT_SEL) type= DEL_NEXT_CHAR;
        else if(type == DEL_PREV_SEL) type= DEL_PREV_CHAR;
    }

    switch(type) {
        case DEL_ALL:
            cu->len = cu->pos = 0;
            ef->textbuf[0]= 0;
            break;
        case DEL_SELECTION:
            if(!kill_selection(obedit, 0))
                return OPERATOR_CANCELLED;
            break;
        case DEL_PREV_CHAR:
            if(cu->pos<=0)
                return OPERATOR_CANCELLED;

            for(x=cu->pos;x<=cu->len;x++)
                ef->textbuf[x-1]= ef->textbuf[x];
            for(x=cu->pos;x<=cu->len;x++)
                ef->textbufinfo[x-1]= ef->textbufinfo[x];                   

            cu->pos--;
            ef->textbuf[--cu->len]='\0';
            break;
        case DEL_NEXT_CHAR:
            if(cu->pos>=cu->len)
                return OPERATOR_CANCELLED;

            for(x=cu->pos;x<cu->len;x++)
                ef->textbuf[x]= ef->textbuf[x+1];
            for(x=cu->pos;x<cu->len;x++)
                ef->textbufinfo[x]= ef->textbufinfo[x+1];                   

            ef->textbuf[--cu->len]='\0';
            break;
        default:
            return OPERATOR_CANCELLED;
    }

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

void FONT_OT_delete(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Delete";
    ot->description= "Delete text by cursor position";
    ot->idname= "FONT_OT_delete";
    
    /* api callbacks */
    ot->exec= delete_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "type", delete_type_items, DEL_ALL, "Type", "Which part of the text to delete");
}

/*********************** insert text operator *************************/

static int insert_text_exec(bContext *C, wmOperator *op)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    char *inserted_utf8;
    wchar_t *inserted_text;
    int a, len;

    if(!RNA_struct_property_is_set(op->ptr, "text"))
        return OPERATOR_CANCELLED;
    
    inserted_utf8= RNA_string_get_alloc(op->ptr, "text", NULL, 0);
    len= BLI_strlen_utf8(inserted_utf8);

    inserted_text= MEM_callocN(sizeof(wchar_t)*(len+1), "FONT_insert_text");
    BLI_strncpy_wchar_from_utf8(inserted_text, inserted_utf8, len+1);

    for(a=0; a<len; a++)
        insert_into_textbuf(obedit, inserted_text[a]);

    MEM_freeN(inserted_text);
    MEM_freeN(inserted_utf8);

    kill_selection(obedit, 1);
    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

static int insert_text_invoke(bContext *C, wmOperator *op, wmEvent *evt)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    static int accentcode= 0;
    uintptr_t ascii = evt->ascii;
    int alt= evt->alt, shift= evt->shift, ctrl= evt->ctrl;
    int event= evt->type, val= evt->val;
    wchar_t inserted_text[2]= {0};

    if(RNA_struct_property_is_set(op->ptr, "text"))
        return insert_text_exec(C, op);

    if(RNA_struct_property_is_set(op->ptr, "accent")) {
        if(cu->len!=0 && cu->pos>0)
            accentcode= 1;
        return OPERATOR_FINISHED;
    }
    
    /* tab should exit editmode, but we allow it to be typed using modifier keys */
    if(event==TABKEY) {
        if((alt||ctrl||shift) == 0)
            return OPERATOR_PASS_THROUGH;
        else
            ascii= 9;
    }
    else if(event==BACKSPACEKEY)
        ascii= 0;

    if(val && (ascii || evt->utf8_buf[0])) {
        /* handle case like TAB (== 9) */
        if(     (ascii > 31 && ascii < 254 && ascii != 127) ||
                (ascii==13) ||
                (ascii==10) ||
                (ascii==8)  ||
                (evt->utf8_buf[0]))
        {

            if (evt->utf8_buf[0]) {
                BLI_strncpy_wchar_from_utf8(inserted_text, evt->utf8_buf, 1);
                ascii= inserted_text[0];
                insert_into_textbuf(obedit, ascii);
                accentcode= 0;
            }
            else if(accentcode) {
                if(cu->pos>0) {
                    inserted_text[0]= findaccent(ef->textbuf[cu->pos-1], ascii);
                    ef->textbuf[cu->pos-1]= inserted_text[0];
                }
                accentcode= 0;
            }
            else if(cu->len<MAXTEXT-1) {
                if(alt) {
                    /* might become obsolete, apple has default values for this, other OS's too? */
                    if(ascii=='t') ascii= 137;
                    else if(ascii=='c') ascii= 169;
                    else if(ascii=='f') ascii= 164;
                    else if(ascii=='g') ascii= 176;
                    else if(ascii=='l') ascii= 163;
                    else if(ascii=='r') ascii= 174;
                    else if(ascii=='s') ascii= 223;
                    else if(ascii=='y') ascii= 165;
                    else if(ascii=='.') ascii= 138;
                    else if(ascii=='1') ascii= 185;
                    else if(ascii=='2') ascii= 178;
                    else if(ascii=='3') ascii= 179;
                    else if(ascii=='%') ascii= 139;
                    else if(ascii=='?') ascii= 191;
                    else if(ascii=='!') ascii= 161;
                    else if(ascii=='x') ascii= 215;
                    else if(ascii=='>') ascii= 187;
                    else if(ascii=='<') ascii= 171;
                }

                inserted_text[0]= ascii;
                insert_into_textbuf(obedit, ascii);
            }
            
            kill_selection(obedit, 1);
            text_update_edited(C, scene, obedit, 1, FO_EDIT);
        }
        else {
            inserted_text[0]= ascii;
            insert_into_textbuf(obedit, ascii);
            text_update_edited(C, scene, obedit, 1, FO_EDIT);
        }
    }
    else if(val && event == BACKSPACEKEY) {
        if(alt && cu->len!=0 && cu->pos>0)
            accentcode= 1;

        return OPERATOR_PASS_THROUGH;
    }
    else
        return OPERATOR_PASS_THROUGH;

    if(inserted_text[0]) {
        /* store as utf8 in RNA string */
        char inserted_utf8[8] = {0};

        BLI_strncpy_wchar_as_utf8(inserted_utf8, inserted_text, sizeof(inserted_utf8));
        RNA_string_set(op->ptr, "text", inserted_utf8);
    }

    /* reset property? */
    accentcode= 0;
    
    return OPERATOR_FINISHED;
}

void FONT_OT_text_insert(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Insert Text";
    ot->description= "Insert text at cursor position";
    ot->idname= "FONT_OT_text_insert";
    
    /* api callbacks */
    ot->exec= insert_text_exec;
    ot->invoke= insert_text_invoke;
    ot->poll= ED_operator_editfont;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_string(ot->srna, "text", "", 0, "Text", "Text to insert at the cursor position");
    RNA_def_boolean(ot->srna, "accent", 0, "Accent mode", "Next typed character will strike through previous, for special character input");
}


/*********************** textbox add operator *************************/
static int textbox_add_exec(bContext *C, wmOperator *UNUSED(op))
{
    Object *obedit= CTX_data_active_object(C);
    Curve *cu= obedit->data;
    int i;
    
    if (cu->totbox < 256) {
        for (i = cu->totbox; i>cu->actbox; i--) cu->tb[i]= cu->tb[i-1];
        cu->tb[cu->actbox]= cu->tb[cu->actbox-1];
        cu->actbox++;
        cu->totbox++;
    }
    
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, obedit->data);
    return OPERATOR_FINISHED;
}

void FONT_OT_textbox_add(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Add Textbox";
    ot->description= "Add a new text box";
    ot->idname= "FONT_OT_textbox_add";
    
    /* api callbacks */
    ot->exec= textbox_add_exec;
    ot->poll= ED_operator_object_active_editable_font;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
    
    
}



/*********************** textbox remove operator *************************/



static int textbox_remove_exec(bContext *C, wmOperator *op)
{
    Object *obedit= CTX_data_active_object(C);
    Curve *cu= obedit->data;
    int i;
    int index = RNA_int_get(op->ptr, "index");
    
    
    if (cu->totbox > 1) {
        for (i = index; i < cu->totbox; i++) cu->tb[i]= cu->tb[i+1];
        cu->totbox--;
        if (cu->actbox >= index)
            cu->actbox--;
    }
    
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, obedit->data);
    
    return OPERATOR_FINISHED;
}

void FONT_OT_textbox_remove(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Remove Textbox";
    ot->description= "Remove the textbox";
    ot->idname= "FONT_OT_textbox_remove";
    
    /* api callbacks */
    ot->exec= textbox_remove_exec;
    ot->poll= ED_operator_object_active_editable_font;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
    
    RNA_def_int(ot->srna, "index", 0, 0, INT_MAX, "Index", "The current text box", 0, INT_MAX);
}



/***************** editmode enter/exit ********************/

void make_editText(Object *obedit)
{
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    
    if(ef==NULL) {
        ef= cu->editfont= MEM_callocN(sizeof(EditFont), "editfont");
    
        ef->textbuf= MEM_callocN((MAXTEXT+4)*sizeof(wchar_t), "texteditbuf");
        ef->textbufinfo= MEM_callocN((MAXTEXT+4)*sizeof(CharInfo), "texteditbufinfo");
        ef->copybuf= MEM_callocN((MAXTEXT+4)*sizeof(wchar_t), "texteditcopybuf");
        ef->copybufinfo= MEM_callocN((MAXTEXT+4)*sizeof(CharInfo), "texteditcopybufinfo");  
        ef->oldstr= MEM_callocN((MAXTEXT+4)*sizeof(wchar_t), "oldstrbuf");
        ef->oldstrinfo= MEM_callocN((MAXTEXT+4)*sizeof(CharInfo), "oldstrbuf");
    }
    
    // Convert the original text to wchar_t
    BLI_strncpy_wchar_from_utf8(ef->textbuf, cu->str, MAXTEXT+4); /* length is bogus */
    wcscpy(ef->oldstr, ef->textbuf);
        
    cu->len= wcslen(ef->textbuf);
    
    memcpy(ef->textbufinfo, cu->strinfo, (cu->len)*sizeof(CharInfo));
    memcpy(ef->oldstrinfo, cu->strinfo, (cu->len)*sizeof(CharInfo));

    if(cu->pos>cu->len) cu->pos= cu->len;

    if(cu->pos)
        cu->curinfo = ef->textbufinfo[cu->pos-1];
    else
        cu->curinfo = ef->textbufinfo[0];
    
    // Convert to UTF-8
    update_string(cu);
}

void load_editText(Object *obedit)
{
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    
    MEM_freeN(ef->oldstr);
    ef->oldstr= NULL;
    MEM_freeN(ef->oldstrinfo);
    ef->oldstrinfo= NULL;
    
    update_string(cu);
    
    if(cu->strinfo)
        MEM_freeN(cu->strinfo);
    cu->strinfo= MEM_callocN((cu->len+4)*sizeof(CharInfo), "texteditinfo");
    memcpy(cu->strinfo, ef->textbufinfo, (cu->len)*sizeof(CharInfo));

    cu->len= strlen(cu->str);
    
    /* this memory system is weak... */
    
    if(cu->selboxes) {
        MEM_freeN(cu->selboxes);
        cu->selboxes= NULL;
    }
}

void free_editText(Object *obedit)
{
    BKE_free_editfont((Curve *)obedit->data);
}

/********************** set case operator *********************/

static EnumPropertyItem case_items[]= {
    {CASE_LOWER, "LOWER", 0, "Lower", ""},
    {CASE_UPPER, "UPPER", 0, "Upper", ""},
    {0, NULL, 0, NULL, NULL}};

static int set_case(bContext *C, int ccase)
{
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    wchar_t *str;
    int len;
    
    len= wcslen(ef->textbuf);
    str= ef->textbuf;
    while(len) {
        if(*str>='a' && *str<='z')
            *str-= 32;
        len--;
        str++;
    }
    
    if(ccase == CASE_LOWER) {
        len= wcslen(ef->textbuf);
        str= ef->textbuf;
        while(len) {
            if(*str>='A' && *str<='Z') {
                *str+= 32;
            }
            len--;
            str++;
        }
    }

    text_update_edited(C, scene, obedit, 1, FO_EDIT);

    return OPERATOR_FINISHED;
}

static int set_case_exec(bContext *C, wmOperator *op)
{
    return set_case(C, RNA_enum_get(op->ptr, "case"));
}

void FONT_OT_case_set(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Set Case";
    ot->description= "Set font case";
    ot->idname= "FONT_OT_case_set";
    
    /* api callbacks */
    ot->exec= set_case_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    /* properties */
    RNA_def_enum(ot->srna, "case", case_items, CASE_LOWER, "Case", "Lower or upper case");
}

/********************** toggle case operator *********************/

static int toggle_case_exec(bContext *C, wmOperator *UNUSED(op))
{
    Object *obedit= CTX_data_edit_object(C);
    Curve *cu= obedit->data;
    EditFont *ef= cu->editfont;
    wchar_t *str;
    int len, ccase= CASE_UPPER;
    
    len= wcslen(ef->textbuf);
    str= ef->textbuf;
    while(len) {
        if(*str>='a' && *str<='z') {
            ccase= CASE_LOWER;
            break;
        }

        len--;
        str++;
    }
    
    return set_case(C, ccase);
}

void FONT_OT_case_toggle(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Toggle Case";
    ot->description= "Toggle font case";
    ot->idname= "FONT_OT_case_toggle";
    
    /* api callbacks */
    ot->exec= toggle_case_exec;
    ot->poll= ED_operator_editfont;

    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/* **************** Open Font ************** */

static void font_ui_template_init(bContext *C, wmOperator *op)
{
    PropertyPointerRNA *pprop;
    
    op->customdata= pprop= MEM_callocN(sizeof(PropertyPointerRNA), "OpenPropertyPointerRNA");
    uiIDContextProperty(C, &pprop->ptr, &pprop->prop);
}

static int font_open_cancel(bContext *UNUSED(C), wmOperator *op)
{
    MEM_freeN(op->customdata);
    op->customdata= NULL;
    return OPERATOR_CANCELLED;
}

static int font_open_exec(bContext *C, wmOperator *op)
{
    struct Main *bmain= CTX_data_main(C);
    VFont *font;
    PropertyPointerRNA *pprop;
    PointerRNA idptr;
    char filepath[FILE_MAX];
    RNA_string_get(op->ptr, "filepath", filepath);

    font= load_vfont(bmain, filepath);

    if(!font) {
        if(op->customdata) MEM_freeN(op->customdata);
        return OPERATOR_CANCELLED;
    }

    if(!op->customdata)
        font_ui_template_init(C, op);
    
    /* hook into UI */
    pprop= op->customdata;

    if(pprop->prop) {
        /* when creating new ID blocks, use is already 1, but RNA
         * pointer se also increases user, so this compensates it */
        font->id.us--;
    
        RNA_id_pointer_create(&font->id, &idptr);
        RNA_property_pointer_set(&pprop->ptr, pprop->prop, idptr);
        RNA_property_update(C, &pprop->ptr, pprop->prop);
    }

    MEM_freeN(op->customdata);

    return OPERATOR_FINISHED;
}

static int open_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
    VFont *font=NULL;
    char *path;

    PointerRNA idptr;
    PropertyPointerRNA *pprop;

    font_ui_template_init(C, op);

    /* hook into UI */
    pprop= op->customdata;

    if(pprop->prop) {
        idptr= RNA_property_pointer_get((PointerRNA *)pprop, pprop->prop);
        font= idptr.id.data;
    }

    path = (font && strcmp(font->name, FO_BUILTIN_NAME) != 0)? font->name: U.fontdir;

    if(RNA_struct_property_is_set(op->ptr, "filepath"))
        return font_open_exec(C, op);

    RNA_string_set(op->ptr, "filepath", path);
    WM_event_add_fileselect(C, op); 

    return OPERATOR_RUNNING_MODAL;
}

void FONT_OT_open(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Open Font";
    ot->idname= "FONT_OT_open";
    
    /* api callbacks */
    ot->exec= font_open_exec;
    ot->invoke= open_invoke;
    ot->cancel= font_open_cancel;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
    
    /* properties */
    WM_operator_properties_filesel(ot, FOLDERFILE|FTFONTFILE, FILE_SPECIAL, FILE_OPENFILE, WM_FILESEL_FILEPATH|WM_FILESEL_RELPATH);
}

/******************* delete operator *********************/

static int font_unlink_exec(bContext *C, wmOperator *op)
{
    VFont *builtin_font;

    PointerRNA idptr;
    PropertyPointerRNA pprop;

    uiIDContextProperty(C, &pprop.ptr, &pprop.prop);
    
    if(pprop.prop==NULL) {
        BKE_report(op->reports, RPT_ERROR, "Incorrect context for running font unlink");
        return OPERATOR_CANCELLED;
    }

    builtin_font = get_builtin_font();

    RNA_id_pointer_create(&builtin_font->id, &idptr);
    RNA_property_pointer_set(&pprop.ptr, pprop.prop, idptr);
    RNA_property_update(C, &pprop.ptr, pprop.prop);

    return OPERATOR_FINISHED;
}

void FONT_OT_unlink(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Unlink";
    ot->idname= "FONT_OT_unlink";
    ot->description= "Unlink active font data block";
    
    /* api callbacks */
    ot->exec= font_unlink_exec;
}


/* **************** undo for font object ************** */

static void undoFont_to_editFont(void *strv, void *ecu)
{
    Curve *cu= (Curve *)ecu;
    EditFont *ef= cu->editfont;
    char *str= strv;

    cu->pos= *((short *)str);
    cu->len= *((short *)(str+2));

    memcpy(ef->textbuf, str+4, (cu->len+1)*sizeof(wchar_t));
    memcpy(ef->textbufinfo, str+4 + (cu->len+1)*sizeof(wchar_t), cu->len*sizeof(CharInfo));
    
    cu->selstart = cu->selend = 0;
    
    update_string(cu);
}

static void *editFont_to_undoFont(void *ecu)
{
    Curve *cu= (Curve *)ecu;
    EditFont *ef= cu->editfont;
    char *str;
    
    // The undo buffer includes [MAXTEXT+6]=actual string and [MAXTEXT+4]*sizeof(CharInfo)=charinfo
    str= MEM_callocN((MAXTEXT+6)*sizeof(wchar_t) + (MAXTEXT+4)*sizeof(CharInfo), "string undo");

    // Copy the string and string information
    memcpy(str+4, ef->textbuf, (cu->len+1)*sizeof(wchar_t));
    memcpy(str+4 + (cu->len+1)*sizeof(wchar_t), ef->textbufinfo, cu->len*sizeof(CharInfo));

    *((short *)str)= cu->pos;
    *((short *)(str+2))= cu->len;   
    
    return str;
}

static void free_undoFont(void *strv)
{
    MEM_freeN(strv);
}

static void *get_undoFont(bContext *C)
{
    Object *obedit= CTX_data_edit_object(C);
    if(obedit && obedit->type==OB_FONT) {
        return obedit->data;
    }
    return NULL;
}

/* and this is all the undo system needs to know */
void undo_push_font(bContext *C, const char *name)
{
    undo_editmode_push(C, name, get_undoFont, free_undoFont, undoFont_to_editFont, editFont_to_undoFont, NULL);
}