diff options
Diffstat (limited to 'pdf/pdf_form.c')
| -rw-r--r-- | pdf/pdf_form.c | 1935 |
1 files changed, 1935 insertions, 0 deletions
diff --git a/pdf/pdf_form.c b/pdf/pdf_form.c new file mode 100644 index 00000000..dbc3a326 --- /dev/null +++ b/pdf/pdf_form.c @@ -0,0 +1,1935 @@ +#include "fitz-internal.h" +#include "mupdf-internal.h" + +#define MATRIX_COEFS (6) + +enum +{ + Ff_Multiline = 1 << (13-1), + Ff_Password = 1 << (14-1), + Ff_NoToggleToOff = 1 << (15-1), + Ff_Radio = 1 << (16-1), + Ff_Pushbutton = 1 << (17-1), + Ff_Combo = 1 << (18-1), + Ff_FileSelect = 1 << (21-1), + Ff_DoNotSpellCheck = 1 << (23-1), + Ff_DoNotScroll = 1 << (24-1), + Ff_Comb = 1 << (25-1), + Ff_RadioInUnison = 1 << (26-1) +}; + +enum +{ + BS_Solid, + BS_Dashed, + BS_Beveled, + BS_Inset, + BS_Underline +}; + +enum +{ + Q_Left = 0, + Q_Cent = 1, + Q_Right = 2 +}; + +struct fz_widget_s +{ + pdf_document *doc; + int type; + pdf_obj *obj; +}; + +struct fz_widget_text_s +{ + fz_widget super; + char *text; +}; + +typedef struct da_info_s +{ + char *font_name; + int font_size; + float col[4]; + int col_size; +} da_info; + +typedef struct font_info_s +{ + da_info da_rec; + pdf_font_desc *font; +} font_info; + +typedef struct text_widget_info_s +{ + pdf_obj *dr; + font_info font_rec; + int q; + int multiline; + int comb; + int max_len; +} text_widget_info; + +static const char *fmt_re = "%f %f %f %f re\n"; +static const char *fmt_f = "f\n"; +static const char *fmt_s = "s\n"; +static const char *fmt_g = "%f g\n"; +static const char *fmt_m = "%f %f m\n"; +static const char *fmt_l = "%f %f l\n"; +static const char *fmt_w = "%f w\n"; +static const char *fmt_Tx_BMC = "/Tx BMC\n"; +static const char *fmt_q = "q\n"; +static const char *fmt_W = "W\n"; +static const char *fmt_n = "n\n"; +static const char *fmt_BT = "BT\n"; +static const char *fmt_Tm = "%1.2f %1.2f %1.2f %1.2f %1.2f %1.2f Tm\n"; +static const char *fmt_Td = "%f %f Td\n"; +static const char *fmt_Tj = " Tj\n"; +static const char *fmt_ET = "ET\n"; +static const char *fmt_Q = "Q\n"; +static const char *fmt_EMC = "EMC\n"; + +static void account_for_rot(fz_rect *rect, fz_matrix *mat, int rot) +{ + float width = rect->x1; + float height = rect->y1; + + switch (rot) + { + default: + *mat = fz_identity; + break; + case 90: + *mat = fz_concat(fz_rotate(rot), fz_translate(width, 0)); + rect->x1 = height; + rect->y1 = width; + break; + case 180: + *mat = fz_concat(fz_rotate(rot), fz_translate(width, height)); + break; + case 270: + *mat = fz_concat(fz_rotate(rot), fz_translate(0, height)); + rect->x1 = height; + rect->y1 = width; + break; + } +} + +static pdf_obj *get_inheritable(pdf_document *doc, pdf_obj *obj, char *key) +{ + pdf_obj *fobj = NULL; + + while (!fobj && obj) + { + fobj = pdf_dict_gets(obj, key); + + if (!fobj) + obj = pdf_dict_gets(obj, "Parent"); + } + + return fobj ? fobj + : pdf_dict_gets(pdf_dict_gets(pdf_dict_gets(doc->trailer, "Root"), "AcroForm"), key); +} + +static char *get_string_or_stream(pdf_document *doc, pdf_obj *obj) +{ + fz_context *ctx = doc->ctx; + int len = 0; + char *buf = NULL; + fz_buffer *strmbuf = NULL; + char *text = NULL; + + fz_var(strmbuf); + fz_var(text); + fz_try(ctx) + { + if (pdf_is_string(obj)) + { + len = pdf_to_str_len(obj); + buf = pdf_to_str_buf(obj); + } + else if (pdf_is_stream(doc, pdf_to_num(obj), pdf_to_gen(obj))) + { + strmbuf = pdf_load_stream(doc, pdf_to_num(obj), pdf_to_gen(obj)); + len = fz_buffer_storage(ctx, strmbuf, (unsigned char **)&buf); + } + + if (buf) + { + text = fz_malloc(ctx, len+1); + memcpy(text, buf, len); + text[len] = 0; + } + } + fz_always(ctx) + { + fz_drop_buffer(ctx, strmbuf); + } + fz_catch(ctx) + { + fz_free(ctx, text); + fz_rethrow(ctx); + } + + return text; +} + +static char *get_field_type_name(pdf_document *doc, pdf_obj *obj) +{ + return pdf_to_name(get_inheritable(doc, obj, "FT")); +} + +static int get_field_flags(pdf_document *doc, pdf_obj *obj) +{ + return pdf_to_int(get_inheritable(doc, obj, "Ff")); +} + +static int get_field_type(pdf_document *doc, pdf_obj *obj) +{ + char *type = get_field_type_name(doc, obj); + int flags = get_field_flags(doc, obj); + + if (!strcmp(type, "Btn")) + { + if (flags & Ff_Pushbutton) + return FZ_WIDGET_TYPE_PUSHBUTTON; + else if (flags & Ff_Radio) + return FZ_WIDGET_TYPE_RADIOBUTTON; + else + return FZ_WIDGET_TYPE_CHECKBOX; + } + else if (!strcmp(type, "Tx")) + return FZ_WIDGET_TYPE_TEXT; + else if (!strcmp(type, "Ch")) + { + if (flags & Ff_Combo) + return FZ_WIDGET_TYPE_COMBOBOX; + else + return FZ_WIDGET_TYPE_LISTBOX; + } + else + return -1; +} + +/* Find the point in a field hierarchy where all descendents + * share the same name */ +static pdf_obj *find_head_of_field_group(pdf_obj *obj) +{ + if (obj == NULL || pdf_dict_gets(obj, "T")) + return obj; + else + return find_head_of_field_group(pdf_dict_gets(obj, "Parent")); +} + +static void pdf_field_mark_dirty(fz_context *ctx, pdf_obj *field) +{ + if (!pdf_dict_gets(field, "Dirty")) + { + pdf_obj *nullobj = pdf_new_null(ctx); + fz_try(ctx) + { + pdf_dict_puts(field, "Dirty", nullobj); + } + fz_always(ctx) + { + pdf_drop_obj(nullobj); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } + } +} + +static void copy_resources(pdf_obj *dst, pdf_obj *src) +{ + int i, len; + + len = pdf_dict_len(src); + for (i = 0; i < len; i++) + { + pdf_obj *key = pdf_dict_get_key(src, i); + + if (!pdf_dict_get(dst, key)) + pdf_dict_put(dst, key, pdf_dict_get_val(src, i)); + } +} + +static fz_widget *new_widget(pdf_document *doc, pdf_obj *obj) +{ + fz_widget *widget = NULL; + + fz_try(doc->ctx) + { + int type = get_field_type(doc, obj); + + switch(type) + { + case FZ_WIDGET_TYPE_TEXT: + widget = &(fz_malloc_struct(doc->ctx, fz_widget_text)->super); + break; + default: + widget = fz_malloc_struct(doc->ctx, fz_widget); + break; + } + + widget->doc = doc; + widget->type = type; + widget->obj = pdf_keep_obj(obj); + } + fz_catch(doc->ctx) + { + fz_warn(doc->ctx, "failed to load foccussed widget"); + } + + return widget; +} + +static void da_info_fin(fz_context *ctx, da_info *di) +{ + fz_free(ctx, di->font_name); + di->font_name = NULL; +} + +static void da_check_stack(float *stack, int *top) +{ + if (*top == 32) + { + memmove(stack, stack + 1, 31 * sizeof(stack[0])); + *top = 31; + } +} + +static void parse_da(fz_context *ctx, char *da, da_info *di) +{ + float stack[32]; + int top = 0; + int tok; + char *name = NULL; + pdf_lexbuf lbuf; + fz_stream *str = fz_open_memory(ctx, (unsigned char *)da, strlen(da)); + + pdf_lexbuf_init(ctx, &lbuf, PDF_LEXBUF_SMALL); + + fz_var(str); + fz_var(name); + fz_try(ctx) + { + for (tok = pdf_lex(str, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str, &lbuf)) + { + switch (tok) + { + case PDF_TOK_NAME: + fz_free(ctx, name); + name = fz_strdup(ctx, lbuf.scratch); + break; + + case PDF_TOK_INT: + da_check_stack(stack, &top); + stack[top] = lbuf.i; + top ++; + break; + + case PDF_TOK_REAL: + da_check_stack(stack, &top); + stack[top] = lbuf.f; + top ++; + break; + + case PDF_TOK_KEYWORD: + if (!strcmp(lbuf.scratch, "Tf")) + { + di->font_size = stack[0]; + di->font_name = name; + name = NULL; + } + else if (!strcmp(lbuf.scratch, "rg")) + { + di->col[0] = stack[0]; + di->col[1] = stack[1]; + di->col[2] = stack[2]; + di->col_size = 3; + } + + fz_free(ctx, name); + name = NULL; + top = 0; + break; + } + } + } + fz_always(ctx) + { + fz_free(ctx, name); + fz_close(str); + pdf_lexbuf_fin(&lbuf); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +static void get_font_info(pdf_document *doc, pdf_obj *dr, char *da, font_info *font_rec) +{ + fz_context *ctx = doc->ctx; + + parse_da(ctx, da, &font_rec->da_rec); + if (font_rec->da_rec.font_name == NULL) + fz_throw(ctx, "No font name in default appearance"); + font_rec->font = pdf_load_font(doc, dr, pdf_dict_gets(pdf_dict_gets(dr, "Font"), font_rec->da_rec.font_name)); +} + +static void font_info_fin(fz_context *ctx, font_info *font_rec) +{ + pdf_drop_font(ctx, font_rec->font); + font_rec->font = NULL; + da_info_fin(ctx, &font_rec->da_rec); +} + +static void get_text_widget_info(pdf_document *doc, pdf_obj *widget, text_widget_info *info) +{ + char *da = pdf_to_str_buf(get_inheritable(doc, widget, "DA")); + int ff = get_field_flags(doc, widget); + pdf_obj *ml = get_inheritable(doc, widget, "MaxLen"); + + info->dr = get_inheritable(doc, widget, "DR"); + info->q = pdf_to_int(get_inheritable(doc, widget, "Q")); + info->multiline = (ff & Ff_Multiline) != 0; + info->comb = (ff & (Ff_Multiline|Ff_Password|Ff_FileSelect|Ff_Comb)) == Ff_Comb; + + if (ml == NULL) + info->comb = 0; + else + info->max_len = pdf_to_int(ml); + + get_font_info(doc, info->dr, da, &info->font_rec); +} + +static void fzbuf_print_da(fz_context *ctx, fz_buffer *fzbuf, da_info *di) +{ + if (di->font_name != NULL && di->font_size != 0) + fz_buffer_printf(ctx, fzbuf, "/%s %d Tf", di->font_name, di->font_size); + + if (di->col_size != 0) + fz_buffer_printf(ctx, fzbuf, " %f %f %f rg", di->col[0], di->col[1], di->col[2]); + else + fz_buffer_printf(ctx, fzbuf, " 0 g"); +} + +static fz_rect measure_text(pdf_document *doc, font_info *font_rec, const fz_matrix *tm, char *text) +{ + fz_rect bbox = pdf_measure_text(doc->ctx, font_rec->font, (unsigned char *)text, strlen(text)); + + bbox.x0 *= font_rec->da_rec.font_size * tm->a; + bbox.y0 *= font_rec->da_rec.font_size * tm->d; + bbox.x1 *= font_rec->da_rec.font_size * tm->a; + bbox.y1 *= font_rec->da_rec.font_size * tm->d; + + return bbox; +} + +static void fzbuf_print_text(fz_context *ctx, fz_buffer *fzbuf, fz_rect *clip, font_info *font_rec, fz_matrix *tm, char *text) +{ + fz_buffer_printf(ctx, fzbuf, fmt_q); + if (clip) + { + fz_buffer_printf(ctx, fzbuf, fmt_re, clip->x0, clip->y0, clip->x1 - clip->x0, clip->y1 - clip->y0); + fz_buffer_printf(ctx, fzbuf, fmt_W); + fz_buffer_printf(ctx, fzbuf, fmt_n); + } + + fz_buffer_printf(ctx, fzbuf, fmt_BT); + + fzbuf_print_da(ctx, fzbuf, &font_rec->da_rec); + + fz_buffer_printf(ctx, fzbuf, "\n"); + if (tm) + fz_buffer_printf(ctx, fzbuf, fmt_Tm, tm->a, tm->b, tm->c, tm->d, tm->e, tm->f); + + fz_buffer_cat_pdf_string(ctx, fzbuf, text); + fz_buffer_printf(ctx, fzbuf, fmt_Tj); + fz_buffer_printf(ctx, fzbuf, fmt_ET); + fz_buffer_printf(ctx, fzbuf, fmt_Q); +} + +static fz_buffer *create_text_buffer(fz_context *ctx, fz_rect *clip, font_info *font_rec, fz_matrix *tm, char *text) +{ + fz_buffer *fzbuf = fz_new_buffer(ctx, 0); + + fz_try(ctx) + { + fz_buffer_printf(ctx, fzbuf, fmt_Tx_BMC); + fzbuf_print_text(ctx, fzbuf, clip, font_rec, tm, text); + fz_buffer_printf(ctx, fzbuf, fmt_EMC); + } + fz_catch(ctx) + { + fz_drop_buffer(ctx, fzbuf); + fz_rethrow(ctx); + } + + return fzbuf; +} + +static fz_buffer *create_aligned_text_buffer(pdf_document *doc, fz_rect *clip, text_widget_info *info, fz_matrix *tm, char *text) +{ + fz_context *ctx = doc->ctx; + fz_matrix atm = *tm; + + if (info->q != Q_Left) + { + fz_rect rect = measure_text(doc, &info->font_rec, tm, text); + + atm.e -= info->q == Q_Right ? rect.x1 + : (rect.x1 - rect.x0) / 2; + } + + return create_text_buffer(ctx, clip, &info->font_rec, &atm, text); +} + +static void measure_ascent_descent(pdf_document *doc, font_info *finf, char *text, float *ascent, float *descent) +{ + fz_context *ctx = doc->ctx; + char *testtext = NULL; + fz_rect bbox; + font_info tinf = *finf; + + fz_var(testtext); + fz_try(ctx) + { + /* Heuristic: adding "My" to text will in most cases + * produce a measurement that will encompass all chars */ + testtext = fz_malloc(ctx, strlen(text) + 3); + strcpy(testtext, "My"); + strcat(testtext, text); + tinf.da_rec.font_size = 1; + bbox = measure_text(doc, &tinf, &fz_identity, testtext); + *descent = -bbox.y0; + *ascent = bbox.y1; + } + fz_always(ctx) + { + fz_free(ctx, testtext); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +typedef struct text_splitter_s +{ + font_info *info; + float width; + float height; + float scale; + float unscaled_width; + float fontsize; + char *text; + int done; + float x_orig; + float y_orig; + float x; + float x_end; + int text_start; + int text_end; + int max_lines; + int retry; +} text_splitter; + +static void text_splitter_init(text_splitter *splitter, font_info *info, char *text, float width, float height, int variable) +{ + float fontsize = info->da_rec.font_size; + + memset(splitter, 0, sizeof(*splitter)); + splitter->info = info; + splitter->text = text; + splitter->width = width; + splitter->unscaled_width = width; + splitter->height = height; + splitter->fontsize = fontsize; + splitter->scale = 1.0; + /* RJW: The cast in the following line is important, as otherwise + * under MSVC in the variable = 0 case, splitter->max_lines becomes + * INT_MIN. */ + splitter->max_lines = variable ? (int)(height/fontsize) : INT_MAX; +} + +static void text_splitter_start_pass(text_splitter *splitter) +{ + splitter->text_end = 0; + splitter->x_orig = 0; + splitter->y_orig = 0; +} + +static void text_splitter_start_line(text_splitter *splitter) +{ + splitter->x_end = 0; +} + +static int text_splitter_layout(fz_context *ctx, text_splitter *splitter) +{ + char *text; + float room; + float stride; + int count; + int len; + float fontsize = splitter->info->da_rec.font_size; + + splitter->x = splitter->x_end; + splitter->text_start = splitter->text_end; + + text = splitter->text + splitter->text_start; + room = splitter->unscaled_width - splitter->x; + + if (strchr("\r\n", text[0])) + { + /* Consume return chars and report end of line */ + splitter->text_end += strspn(text, "\r\n"); + splitter->text_start = splitter->text_end; + splitter->done = (splitter->text[splitter->text_end] == '\0'); + return 0; + } + else if (text[0] == ' ') + { + /* Treat each space as a word */ + len = 1; + } + else + { + len = 0; + while (text[len] != '\0' && !strchr(" \r\n", text[len])) + len ++; + } + + stride = pdf_text_stride(ctx, splitter->info->font, fontsize, (unsigned char *)text, len, room, &count); + + /* If not a single char fits although the line is empty, then force one char */ + if (count == 0 && splitter->x == 0.0) + stride = pdf_text_stride(ctx, splitter->info->font, fontsize, (unsigned char *)text, 1, FLT_MAX, &count); + + if (count < len && splitter->retry) + { + /* The word didn't fit and we are in retry mode. Work out the + * least additional scaling that may help */ + float fitwidth; /* width if we force the word in */ + float hstretchwidth; /* width if we just bump by 10% */ + float vstretchwidth; /* width resulting from forcing in another line */ + float bestwidth; + + fitwidth = splitter->x + + pdf_text_stride(ctx, splitter->info->font, fontsize, (unsigned char *)text, len, FLT_MAX, &count); + /* FIXME: temporary fiddle factor. Would be better to work in integers */ + fitwidth *= 1.001f; + + /* Stretching by 10% is worth trying only if processing the first word on the line */ + hstretchwidth = splitter->x == 0.0 + ? splitter->width * 1.1 / splitter->scale + : FLT_MAX; + + vstretchwidth = splitter->width * (splitter->max_lines + 1) * splitter->fontsize + / splitter->height; + + bestwidth = fz_min(fitwidth, fz_min(hstretchwidth, vstretchwidth)); + + if (bestwidth == vstretchwidth) + splitter->max_lines ++; + + splitter->scale = splitter->width / bestwidth; + splitter->unscaled_width = bestwidth; + + splitter->retry = 0; + + /* Try again */ + room = splitter->unscaled_width - splitter->x; + stride = pdf_text_stride(ctx, splitter->info->font, fontsize, (unsigned char *)text, len, room, &count); + } + + /* This is not the first word on the line. Best to give up on this line and push + * the word onto the next */ + if (count < len && splitter->x > 0.0) + return 0; + + splitter->text_end = splitter->text_start + count; + splitter->x_end = splitter->x + stride; + splitter->done = (splitter->text[splitter->text_end] == '\0'); + return 1; +} + +static void text_splitter_move(text_splitter *splitter, float newy, float *relx, float *rely) +{ + *relx = splitter->x - splitter->x_orig; + *rely = newy - splitter->y_orig; + + splitter->x_orig = splitter->x; + splitter->y_orig = newy; +} + +static void text_splitter_retry(text_splitter *splitter) +{ + if (splitter->retry) + { + /* Already tried expanding lines. Overflow must + * be caused by carriage control */ + splitter->max_lines ++; + splitter->retry = 0; + splitter->unscaled_width = splitter->width * splitter->max_lines * splitter->fontsize + / splitter->height; + splitter->scale = splitter->width / splitter->unscaled_width; + } + else + { + splitter->retry = 1; + } +} + +static void fzbuf_print_text_start(fz_context *ctx, fz_buffer *fzbuf, fz_rect *clip, font_info *font, fz_matrix *tm) +{ + fz_buffer_printf(ctx, fzbuf, fmt_Tx_BMC); + fz_buffer_printf(ctx, fzbuf, fmt_q); + + if (clip) + { + fz_buffer_printf(ctx, fzbuf, fmt_re, clip->x0, clip->y0, clip->x1 - clip->x0, clip->y1 - clip->y0); + fz_buffer_printf(ctx, fzbuf, fmt_W); + fz_buffer_printf(ctx, fzbuf, fmt_n); + } + + fz_buffer_printf(ctx, fzbuf, fmt_BT); + + fzbuf_print_da(ctx, fzbuf, &font->da_rec); + fz_buffer_printf(ctx, fzbuf, "\n"); + + fz_buffer_printf(ctx, fzbuf, fmt_Tm, tm->a, tm->b, tm->c, tm->d, tm->e, tm->f); +} + +static void fzbuf_print_text_end(fz_context *ctx, fz_buffer *fzbuf) +{ + fz_buffer_printf(ctx, fzbuf, fmt_ET); + fz_buffer_printf(ctx, fzbuf, fmt_Q); + fz_buffer_printf(ctx, fzbuf, fmt_EMC); +} + +static void fzbuf_print_text_word(fz_context *ctx, fz_buffer *fzbuf, float x, float y, char *text, int count) +{ + int i; + + fz_buffer_printf(ctx, fzbuf, fmt_Td, x, y); + fz_buffer_printf(ctx, fzbuf, "("); + + for (i = 0; i < count; i++) + fz_buffer_printf(ctx, fzbuf, "%c", text[i]); + + fz_buffer_printf(ctx, fzbuf, ") Tj\n"); +} + +static fz_buffer *create_text_appearance(pdf_document *doc, fz_rect *bbox, fz_matrix *oldtm, text_widget_info *info, char *text) +{ + fz_context *ctx = doc->ctx; + int fontsize; + int variable; + float height, width, full_width; + fz_buffer *fzbuf = NULL; + fz_buffer *fztmp = NULL; + fz_rect rect; + fz_rect tbox; + rect = *bbox; + + if (rect.x1 - rect.x0 > 3.0 && rect.y1 - rect.y0 > 3.0) + { + rect.x0 += 1.0; + rect.x1 -= 1.0; + rect.y0 += 1.0; + rect.y1 -= 1.0; + } + + height = rect.y1 - rect.y0; + width = rect.x1 - rect.x0; + full_width = bbox->x1 - bbox->x0; + + fz_var(fzbuf); + fz_var(fztmp); + fz_try(ctx) + { + float ascent, descent; + fz_matrix tm; + + variable = (info->font_rec.da_rec.font_size == 0); + fontsize = variable + ? (info->multiline ? 14.0 : floor(height)) + : info->font_rec.da_rec.font_size; + + info->font_rec.da_rec.font_size = fontsize; + + measure_ascent_descent(doc, &info->font_rec, text, &ascent, &descent); + + if (info->multiline) + { + text_splitter splitter; + + text_splitter_init(&splitter, &info->font_rec, text, width, height, variable); + + while (!splitter.done) + { + /* Try a layout pass */ + int line = 0; + + fz_drop_buffer(ctx, fztmp); + fztmp = NULL; + fztmp = fz_new_buffer(ctx, 0); + + text_splitter_start_pass(&splitter); + + /* Layout unscaled text to a scaled-up width, so that + * the scaled-down text will fit the unscaled width */ + + while (!splitter.done && line < splitter.max_lines) + { + /* Layout a line */ + text_splitter_start_line(&splitter); + + while (!splitter.done && text_splitter_layout(ctx, &splitter)) + { + if (splitter.text[splitter.text_start] != ' ') + { + float x, y; + char *word = text+splitter.text_start; + int wordlen = splitter.text_end-splitter.text_start; + + text_splitter_move(&splitter, -line*fontsize, &x, &y); + fzbuf_print_text_word(ctx, fztmp, x, y, word, wordlen); + } + } + + line ++; + } + + if (!splitter.done) + text_splitter_retry(&splitter); + } + + fzbuf = fz_new_buffer(ctx, 0); + + tm.a = splitter.scale; + tm.b = 0.0; + tm.c = 0.0; + tm.d = splitter.scale; + tm.e = rect.x0; + tm.f = rect.y1 - (1.0+ascent-descent)*fontsize*splitter.scale/2.0; + + fzbuf_print_text_start(ctx, fzbuf, &rect, &info->font_rec, &tm); + + fz_buffer_cat(ctx, fzbuf, fztmp); + + fzbuf_print_text_end(ctx, fzbuf); + } + else if (info->comb) + { + int i, n = fz_mini((int)strlen(text), info->max_len); + float comb_width = full_width/info->max_len; + float char_width = pdf_text_stride(ctx, info->font_rec.font, fontsize, (unsigned char *)"M", 1, FLT_MAX, NULL); + float init_skip = (comb_width - char_width)/2.0; + + tm = fz_identity; + tm.e = rect.x0; + tm.f = rect.y1 - (height+(ascent-descent)*fontsize)/2.0; + + fzbuf = fz_new_buffer(ctx, 0); + + fzbuf_print_text_start(ctx, fzbuf, &rect, &info->font_rec, &tm); + + for (i = 0; i < n; i++) + fzbuf_print_text_word(ctx, fzbuf, i == 0 ? init_skip : comb_width, 0.0, text+i, 1); + + fzbuf_print_text_end(ctx, fzbuf); + } + else + { + if (oldtm) + { + tm = *oldtm; + } + else + { + tm = fz_identity; + tm.e = rect.x0; + tm.f = rect.y1 - (height+(ascent-descent)*fontsize)/2.0; + + switch(info->q) + { + case Q_Right: tm.e += width; break; + case Q_Cent: tm.e += width/2; break; + } + } + + if (variable) + { + tbox = measure_text(doc, &info->font_rec, &tm, text); + + if (tbox.x1 - tbox.x0 > width) + { + /* Scale the text to fit but use the same offset + * to keep the baseline constant */ + tm.a *= width / (tbox.x1 - tbox.x0); + tm.d *= width / (tbox.x1 - tbox.x0); + } + } + + fzbuf = create_aligned_text_buffer(doc, &rect, info, &tm, text); + } + } + fz_always(ctx) + { + fz_drop_buffer(ctx, fztmp); + } + fz_catch(ctx) + { + fz_drop_buffer(ctx, fzbuf); + fz_rethrow(ctx); + } + + return fzbuf; +} + +static void update_marked_content(pdf_document *doc, pdf_xobject *form, fz_buffer *fzbuf) +{ + fz_context *ctx = doc->ctx; + int tok; + pdf_lexbuf lbuf; + fz_stream *str_outer = NULL; + fz_stream *str_inner = NULL; + unsigned char *buf; + int len; + fz_buffer *newbuf = NULL; + + pdf_lexbuf_init(ctx, &lbuf, PDF_LEXBUF_SMALL); + + fz_var(str_outer); + fz_var(str_inner); + fz_var(newbuf); + fz_try(ctx) + { + int bmc_found; + int first = 1; + + newbuf = fz_new_buffer(ctx, 0); + str_outer = pdf_open_stream(doc, pdf_to_num(form->contents), pdf_to_gen(form->contents)); + len = fz_buffer_storage(ctx, fzbuf, &buf); + str_inner = fz_open_memory(ctx, buf, len); + + /* Copy the existing appearance stream to newbuf while looking for BMC */ + for (tok = pdf_lex(str_outer, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str_outer, &lbuf)) + { + if (first) + first = 0; + else + fz_buffer_printf(ctx, newbuf, " "); + + pdf_print_token(ctx, newbuf, tok, &lbuf); + if (tok == PDF_TOK_KEYWORD && !strcmp(lbuf.scratch, "BMC")) + break; + } + + bmc_found = (tok != PDF_TOK_EOF); + + if (bmc_found) + { + /* Drop Tx BMC from the replacement appearance stream */ + (void)pdf_lex(str_inner, &lbuf); + (void)pdf_lex(str_inner, &lbuf); + } + + /* Copy the replacement appearance stream to newbuf */ + for (tok = pdf_lex(str_inner, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str_inner, &lbuf)) + { + fz_buffer_printf(ctx, newbuf, " "); + pdf_print_token(ctx, newbuf, tok, &lbuf); + } + + if (bmc_found) + { + /* Drop the rest of the existing appearance stream until EMC found */ + for (tok = pdf_lex(str_outer, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str_outer, &lbuf)) + { + if (tok == PDF_TOK_KEYWORD && !strcmp(lbuf.scratch, "EMC")) + break; + } + + /* Copy the rest of the existing appearance stream to newbuf */ + for (tok = pdf_lex(str_outer, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str_outer, &lbuf)) + { + fz_buffer_printf(ctx, newbuf, " "); + pdf_print_token(ctx, newbuf, tok, &lbuf); + } + } + + /* Use newbuf in place of the existing appearance stream */ + pdf_update_xobject_contents(doc, form, newbuf); + } + fz_always(ctx) + { + fz_close(str_outer); + fz_close(str_inner); + fz_drop_buffer(ctx, newbuf); + pdf_lexbuf_fin(&lbuf); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +static int get_matrix(pdf_document *doc, pdf_xobject *form, int q, fz_matrix *mt) +{ + fz_context *ctx = doc->ctx; + int found = 0; + pdf_lexbuf lbuf; + fz_stream *str; + + str = pdf_open_stream(doc, pdf_to_num(form->contents), pdf_to_gen(form->contents)); + + pdf_lexbuf_init(ctx, &lbuf, PDF_LEXBUF_SMALL); + + fz_try(ctx) + { + int tok; + float coefs[MATRIX_COEFS]; + int coef_i = 0; + + /* Look for the text matrix Tm in the stream */ + for (tok = pdf_lex(str, &lbuf); tok != PDF_TOK_EOF; tok = pdf_lex(str, &lbuf)) + { + if (tok == PDF_TOK_INT || tok == PDF_TOK_REAL) + { + if (coef_i >= MATRIX_COEFS) + { + int i; + for (i = 0; i < MATRIX_COEFS-1; i++) + coefs[i] = coefs[i+1]; + + coef_i = MATRIX_COEFS-1; + } + + coefs[coef_i++] = tok == PDF_TOK_INT ? lbuf.i + : lbuf.f; + } + else + { + if (tok == PDF_TOK_KEYWORD && !strcmp(lbuf.scratch, "Tm") && coef_i == MATRIX_COEFS) + { + found = 1; + mt->a = coefs[0]; + mt->b = coefs[1]; + mt->c = coefs[2]; + mt->d = coefs[3]; + mt->e = coefs[4]; + mt->f = coefs[5]; + } + + coef_i = 0; + } + } + + if (found) + { + fz_rect bbox = pdf_to_rect(ctx, pdf_dict_gets(form->contents, "BBox")); + + switch (q) + { + case Q_Left: + mt->e = bbox.x0 + 1; + break; + + case Q_Cent: + mt->e = (bbox.x1 - bbox.x0) / 2; + break; + + case Q_Right: + mt->e = bbox.x1 - 1; + break; + } + } + } + fz_always(ctx) + { + fz_close(str); + pdf_lexbuf_fin(&lbuf); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } + + return found; +} + +static void update_text_field_value(fz_context *ctx, pdf_obj *obj, char *text) +{ + pdf_obj *sobj = NULL; + pdf_obj *grp; + + /* All fields of the same name should be updated, so + * set the value at the head of the group */ + grp = find_head_of_field_group(obj); + if (grp) + obj = grp; + + fz_var(sobj); + fz_try(ctx) + { + sobj = pdf_new_string(ctx, text, strlen(text)); + pdf_dict_puts(obj, "V", sobj); + } + fz_always(ctx) + { + pdf_drop_obj(sobj); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +static pdf_xobject *load_or_create_form(pdf_document *doc, pdf_obj *obj, fz_rect *rect) +{ + fz_context *ctx = doc->ctx; + pdf_obj *ap = NULL; + pdf_obj *tobj = NULL; + fz_matrix mat; + int rot; + pdf_obj *formobj = NULL; + pdf_xobject *form = NULL; + char *dn = "N"; + fz_buffer *fzbuf = NULL; + int create_form = 0; + + fz_var(formobj); + fz_var(tobj); + fz_var(form); + fz_var(fzbuf); + fz_try(ctx) + { + rot = pdf_to_int(pdf_dict_getp(obj, "MK/R")); + *rect = pdf_to_rect(ctx, pdf_dict_gets(obj, "Rect")); + rect->x1 -= rect->x0; + rect->y1 -= rect->y0; + rect->x0 = rect->y0 = 0; + account_for_rot(rect, &mat, rot); + + ap = pdf_dict_gets(obj, "AP"); + if (ap == NULL) + { + tobj = pdf_new_dict(ctx, 1); + pdf_dict_puts(obj, "AP", tobj); + ap = tobj; + tobj = NULL; + } + + formobj = pdf_dict_gets(ap, dn); + if (formobj == NULL) + { + tobj = pdf_new_xobject(doc, rect, &mat); + pdf_dict_puts(ap, dn, tobj); + formobj = tobj; + tobj = NULL; + create_form = 1; + } + + form = pdf_load_xobject(doc, formobj); + if (create_form) + { + fzbuf = fz_new_buffer(ctx, 1); + pdf_update_xobject_contents(doc, form, fzbuf); + } + + copy_resources(form->resources, get_inheritable(doc, obj, "DR")); + } + fz_always(ctx) + { + pdf_drop_obj(tobj); + fz_drop_buffer(ctx, fzbuf); + } + fz_catch(ctx) + { + pdf_drop_xobject(ctx, form); + fz_rethrow(ctx); + } + + return form; +} + +static void update_text_appearance(pdf_document *doc, pdf_obj *obj, char *eventValue) +{ + fz_context *ctx = doc->ctx; + text_widget_info info; + pdf_xobject *form = NULL; + fz_buffer *fzbuf = NULL; + fz_matrix tm; + fz_rect rect; + int has_tm; + char *text = NULL; + + memset(&info, 0, sizeof(info)); + + fz_var(info); + fz_var(form); + fz_var(fzbuf); + fz_var(text); + fz_try(ctx) + { + if (eventValue) + text = fz_strdup(ctx, eventValue); + else + text = pdf_field_getValue(doc, obj); + + get_text_widget_info(doc, obj, &info); + form = load_or_create_form(doc, obj, &rect); + + has_tm = get_matrix(doc, form, info.q, &tm); + fzbuf = create_text_appearance(doc, &form->bbox, has_tm ? &tm : NULL, &info, + text?text:""); + update_marked_content(doc, form, fzbuf); + } + fz_always(ctx) + { + fz_free(ctx, text); + pdf_drop_xobject(ctx, form); + fz_drop_buffer(ctx, fzbuf); + font_info_fin(ctx, &info.font_rec); + } + fz_catch(ctx) + { + fz_warn(ctx, "update_text_appearance failed"); + } +} + +static void fzbuf_print_color(fz_context *ctx, fz_buffer *fzbuf, pdf_obj *arr, int stroke, float adj) +{ + switch(pdf_array_len(arr)) + { + case 1: + fz_buffer_printf(ctx, fzbuf, stroke?"%f G\n":"%f g\n", + pdf_to_real(pdf_array_get(arr, 0)) + adj); + break; + case 3: + fz_buffer_printf(ctx, fzbuf, stroke?"%f %f %f rg\n":"%f %f %f rg\n", + pdf_to_real(pdf_array_get(arr, 0)) + adj, + pdf_to_real(pdf_array_get(arr, 1)) + adj, + pdf_to_real(pdf_array_get(arr, 2)) + adj); + break; + case 4: + fz_buffer_printf(ctx, fzbuf, stroke?"%f %f %f %f k\n":"%f %f %f %f k\n", + pdf_to_real(pdf_array_get(arr, 0)), + pdf_to_real(pdf_array_get(arr, 1)), + pdf_to_real(pdf_array_get(arr, 2)), + pdf_to_real(pdf_array_get(arr, 3))); + break; + } +} + +static int get_border_style(pdf_obj *obj) +{ + char *sname = pdf_to_name(pdf_dict_getp(obj, "BS/S")); + + if (!strcmp(sname, "D")) + return BS_Dashed; + else if (!strcmp(sname, "B")) + return BS_Beveled; + else if (!strcmp(sname, "I")) + return BS_Inset; + else if (!strcmp(sname, "U")) + return BS_Underline; + else + return BS_Solid; +} + +static float get_border_width(pdf_obj *obj) +{ + float w = pdf_to_real(pdf_dict_getp(obj, "BS/W")); + return w == 0.0 ? 1.0 : w; +} + +static void update_pushbutton_appearance(pdf_document *doc, pdf_obj *obj) +{ + fz_context *ctx = doc->ctx; + fz_rect rect; + pdf_xobject *form = NULL; + fz_buffer *fzbuf = NULL; + pdf_obj *tobj = NULL; + font_info font_rec; + int bstyle; + float bwidth; + float btotal; + + memset(&font_rec, 0, sizeof(font_rec)); + + fz_var(font_rec); + fz_var(form); + fz_var(fzbuf); + fz_try(ctx) + { + form = load_or_create_form(doc, obj, &rect); + fzbuf = fz_new_buffer(ctx, 0); + tobj = pdf_dict_getp(obj, "MK/BG"); + if (pdf_is_array(tobj)) + { + fzbuf_print_color(ctx, fzbuf, tobj, 0, 0.0); + fz_buffer_printf(ctx, fzbuf, fmt_re, + rect.x0, rect.y0, rect.x1, rect.y1); + fz_buffer_printf(ctx, fzbuf, fmt_f); + } + bstyle = get_border_style(obj); + bwidth = get_border_width(obj); + btotal = bwidth; + if (bstyle == BS_Beveled || bstyle == BS_Inset) + { + btotal += bwidth; + + if (bstyle == BS_Beveled) + fz_buffer_printf(ctx, fzbuf, fmt_g, 1.0); + else + fz_buffer_printf(ctx, fzbuf, fmt_g, 0.33); + fz_buffer_printf(ctx, fzbuf, fmt_m, bwidth, bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, bwidth, rect.y1 - bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, rect.x1 - bwidth, rect.y1 - bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, rect.x1 - 2 * bwidth, rect.y1 - 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, 2 * bwidth, rect.y1 - 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, 2 * bwidth, 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_f); + if (bstyle == BS_Beveled) + fzbuf_print_color(ctx, fzbuf, tobj, 0, -0.25); + else + fz_buffer_printf(ctx, fzbuf, fmt_g, 0.66); + fz_buffer_printf(ctx, fzbuf, fmt_m, rect.x1 - bwidth, rect.y1 - bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, rect.x1 - bwidth, bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, bwidth, bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, 2 * bwidth, 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, rect.x1 - 2 * bwidth, 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_l, rect.x1 - 2 * bwidth, rect.y1 - 2 * bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_f); + } + + tobj = pdf_dict_getp(obj, "MK/BC"); + if (tobj) + { + fzbuf_print_color(ctx, fzbuf, tobj, 1, 0.0); + fz_buffer_printf(ctx, fzbuf, fmt_w, bwidth); + fz_buffer_printf(ctx, fzbuf, fmt_re, + bwidth/2, bwidth/2, + rect.x1 -bwidth/2, rect.y1 - bwidth/2); + fz_buffer_printf(ctx, fzbuf, fmt_s); + } + + tobj = pdf_dict_getp(obj, "MK/CA"); + if (tobj) + { + fz_rect clip = rect; + fz_rect bounds; + fz_matrix mat; + char *da = pdf_to_str_buf(pdf_dict_gets(obj, "DA")); + char *text = pdf_to_str_buf(tobj); + + clip.x0 += btotal; + clip.y0 += btotal; + clip.x1 -= btotal; + clip.y1 -= btotal; + + get_font_info(doc, form->resources, da, &font_rec); + bounds = measure_text(doc, &font_rec, &fz_identity, text); + mat = fz_translate((rect.x1 - bounds.x1)/2, (rect.y1 - bounds.y1)/2); + fzbuf_print_text(ctx, fzbuf, &clip, &font_rec, &mat, text); + } + + pdf_update_xobject_contents(doc, form, fzbuf); + } + fz_always(ctx) + { + font_info_fin(ctx, &font_rec); + fz_drop_buffer(ctx, fzbuf); + pdf_drop_xobject(ctx, form); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +static void reset_field(pdf_document *doc, pdf_obj *obj) +{ + fz_context *ctx = doc->ctx; + + switch (get_field_type(doc, obj)) + { + case FZ_WIDGET_TYPE_RADIOBUTTON: + case FZ_WIDGET_TYPE_CHECKBOX: + { + pdf_obj *name = NULL; + + fz_var(name); + fz_try(ctx) + { + name = fz_new_name(ctx, "Off"); + pdf_dict_puts(obj, "AS", name); + } + fz_always(ctx) + { + pdf_drop_obj(name); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } + } + break; + default: + { + pdf_obj *def_val = pdf_dict_gets(obj, "DV"); + + if (def_val) + { + pdf_dict_puts(obj, "V", def_val); + } + else + { + pdf_dict_dels(obj, "V"); + } + + pdf_field_mark_dirty(ctx, obj); + } + } +} + +static void execute_action(pdf_document *doc, pdf_obj *obj, pdf_obj *a) +{ + fz_context *ctx = doc->ctx; + if (a) + { + char *type = pdf_to_name(pdf_dict_gets(a, "S")); + + if (!strcmp(type, "JavaScript")) + { + pdf_obj *js = pdf_dict_gets(a, "JS"); + if (js) + { + char *code = get_string_or_stream(doc, js); + fz_try(ctx) + { + pdf_js_setup_event(doc->js, obj); + pdf_js_execute(doc->js, code); + } + fz_always(ctx) + { + fz_free(ctx, code); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } + } + } + else if (!strcmp(type, "ResetForm")) + { + int flags = pdf_to_int(pdf_dict_gets(a, "Flags")); + pdf_obj *affected_fields = pdf_dict_gets(a, "Fields"); + pdf_obj *all_fields = pdf_dict_getp(doc->trailer, "Root/AcroForm/Fields"); + int i, n = pdf_array_len(all_fields); + + for (i = 0; i < n; i++) + { + pdf_obj *field = pdf_array_get(all_fields, i); + char *name = pdf_to_str_buf(pdf_dict_gets(field, "T")); + int j, m = pdf_array_len(affected_fields); + int found = 0; + + for (j = 0; j < m && !found; j++) + { + pdf_obj *tfield = pdf_array_get(affected_fields, j); + char *tname; + + /* Elements if the array are either indirect references + * to fields or field names. */ + tname = pdf_to_str_buf(pdf_is_string(tfield) ? tfield : pdf_dict_gets(tfield, "T")); + + if (!strcmp(tname, name)) + found = 1; + } + + if (flags & 1) + found = !found; + + if (found) + reset_field(doc, field); + } + } + } +} + +void pdf_update_appearance(pdf_document *doc, pdf_obj *obj) +{ + if (!pdf_dict_gets(obj, "AP") || pdf_dict_gets(obj, "Dirty")) + { + if (!strcmp(pdf_to_name(pdf_dict_gets(obj, "Subtype")), "Widget")) + { + switch(get_field_type(doc, obj)) + { + case FZ_WIDGET_TYPE_TEXT: + { + pdf_obj *formatting = pdf_dict_getp(obj, "AA/F"); + if (formatting) + { + /* Apply formatting */ + execute_action(doc, obj, formatting); + /* Update appearance from JS event.value */ + update_text_appearance(doc, obj, pdf_js_getEventValue(doc->js)); + } + else + { + /* Update appearance from field value */ + update_text_appearance(doc, obj, NULL); + } + } + break; + case FZ_WIDGET_TYPE_PUSHBUTTON: + update_pushbutton_appearance(doc, obj); + break; + } + } + + pdf_dict_dels(obj, "Dirty"); + } +} + +static void execute_action_chain(pdf_document *doc, pdf_obj *obj) +{ + fz_context *ctx = doc->ctx; + pdf_obj *a; + + a = pdf_dict_gets(obj, "A"); + while (a) + { + execute_action(doc, obj, a); + a = pdf_dict_gets(a, "Next"); + } +} + +static void check_off(fz_context *ctx, pdf_obj *obj) +{ + pdf_obj *off = NULL; + + fz_var(off); + fz_try(ctx); + { + off = fz_new_name(ctx, "Off"); + pdf_dict_puts(obj, "AS", off); + } + fz_always(ctx) + { + pdf_drop_obj(off); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +static void set_check(fz_context *ctx, pdf_obj *chk, char *name) +{ + pdf_obj *n = pdf_dict_getp(chk, "AP/N"); + pdf_obj *val = NULL; + + fz_var(val); + fz_try(ctx) + { + /* If name is a possible value of this check + * box then use it, otherwise use "Off" */ + if (pdf_dict_gets(n, name)) + val = fz_new_name(ctx, name); + else + val = fz_new_name(ctx, "Off"); + + pdf_dict_puts(chk, "AS", val); + } + fz_always(ctx) + { + pdf_drop_obj(val); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +/* Set the values of all fields in a group defined by a node + * in the hierarchy */ +static void set_check_grp(fz_context *ctx, pdf_obj *grp, char *val) +{ + pdf_obj *kids = pdf_dict_gets(grp, "Kids"); + + if (kids == NULL) + { + set_check(ctx, grp, val); + } + else + { + int i, n = pdf_array_len(kids); + + for (i = 0; i < n; i++) + set_check_grp(ctx, pdf_array_get(kids, i), val); + } +} + +static void toggle_check_box(pdf_document *doc, pdf_obj *obj) +{ + fz_context *ctx = doc->ctx; + pdf_obj *as = pdf_dict_gets(obj, "AS"); + int ff = get_field_flags(doc, obj); + + if (as && strcmp(pdf_to_name(as), "Off")) + { + /* "as" neither missing nor set to Off. Set it to Off, unless + * this is a non-toggle-off radio button. */ + if ((ff & (Ff_Pushbutton|Ff_NoToggleToOff|Ff_Radio)) != (Ff_NoToggleToOff|Ff_Radio)) + check_off(ctx, obj); + } + else + { + pdf_obj *n, *key = NULL; + int len, i; + + n = pdf_dict_getp(obj, "AP/N"); + + /* Look for a key that isn't "Off" */ + len = pdf_dict_len(n); + for (i = 0; i < len; i++) + { + key = pdf_dict_get_key(n, i); + if (pdf_is_name(key) && strcmp(pdf_to_name(key), "Off")) + break; + } + + /* If we found no alternative value to Off then we have no value to use */ + if (!key) + return; + + /* For radio buttons, first turn off all buttons in the group and + * then set the one that was clicked */ + if ((ff & (Ff_Pushbutton|Ff_Radio)) == Ff_Radio) + { + pdf_obj *kids = pdf_dict_getp(obj, "Parent/Kids"); + int i, n = pdf_array_len(kids); + + for (i = 0; i < n; i++) + check_off(ctx, pdf_array_get(kids, i)); + + pdf_dict_puts(obj, "AS", key); + } + else + { + /* For check boxes, locate the node of the field hierarchy below + * which all fields share a name with the clicked one, and set + * all to the same value. This may cause the group to act like + * radio buttons, if each have distinct "On" values */ + pdf_obj *grp = find_head_of_field_group(obj); + + if (grp) + set_check_grp(doc->ctx, grp, pdf_to_name(key)); + else + set_check(doc->ctx, obj, pdf_to_name(key)); + } + } + + /* FIXME: should probably update the V entry in the field dictionary too */ +} + +int pdf_pass_event(pdf_document *doc, pdf_page *page, fz_ui_event *ui_event) +{ + pdf_annot *annot; + pdf_hotspot *hp = &doc->hotspot; + fz_point *pt = &(ui_event->event.pointer.pt); + int changed = 0; + + for (annot = page->annots; annot; annot = annot->next) + { + if (pt->x >= annot->pagerect.x0 && pt->x <= annot->pagerect.x1) + if (pt->y >= annot->pagerect.y0 && pt->y <= annot->pagerect.y1) + break; + } + + switch (ui_event->etype) + { + case FZ_EVENT_TYPE_POINTER: + { + switch (ui_event->event.pointer.ptype) + { + case FZ_POINTER_DOWN: + if (doc->focus) + { + fz_free_widget(doc->ctx, doc->focus); + doc->focus = NULL; + } + + if (annot) + { + doc->focus = new_widget(doc, annot->obj); + hp->num = pdf_to_num(annot->obj); + hp->gen = pdf_to_gen(annot->obj); + hp->state = HOTSPOT_POINTER_DOWN; + changed = 1; + } + break; + + case FZ_POINTER_UP: + if (hp->state != 0) + changed = 1; + + hp->num = 0; + hp->gen = 0; + hp->state = 0; + + if (annot) + { + switch(get_field_type(doc, annot->obj)) + { + case FZ_WIDGET_TYPE_RADIOBUTTON: + case FZ_WIDGET_TYPE_CHECKBOX: + /* FIXME: treating radio buttons like check boxes, for now */ + toggle_check_box(doc, annot->obj); + changed = 1; + break; + } + + execute_action_chain(doc, annot->obj); + } + break; + } + } + break; + } + + return changed; +} + +fz_rect *pdf_get_screen_update(pdf_document *doc) +{ + return NULL; +} + +fz_widget *pdf_get_focussed_widget(pdf_document *doc) +{ + return doc->focus; +} + +void fz_free_widget(fz_context *ctx, fz_widget *widget) +{ + if (widget) + { + switch(widget->type) + { + case FZ_WIDGET_TYPE_TEXT: + fz_free(ctx, ((fz_widget_text *)widget)->text); + break; + } + + pdf_drop_obj(widget->obj); + fz_free(ctx, widget); + } +} + +int fz_widget_get_type(fz_widget *widget) +{ + return widget->type; +} + +char *pdf_field_getValue(pdf_document *doc, pdf_obj *field) +{ + return get_string_or_stream(doc, get_inheritable(doc, field, "V")); +} + +static void recalculate(pdf_document *doc) +{ + pdf_obj *co = pdf_dict_getp(doc->trailer, "Root/AcroForm/CO"); + + if (co) + { + int i, n = pdf_array_len(co); + + for (i = 0; i < n; i++) + { + pdf_obj *field = pdf_array_get(co, i); + pdf_obj *calc = pdf_dict_getp(field, "AA/C"); + + if (calc) + { + execute_action(doc, field, calc); + /* A calculate action, updates event.value. We need + * to place the value in the field */ + update_text_field_value(doc->ctx, field, pdf_js_getEventValue(doc->js)); + pdf_field_mark_dirty(doc->ctx, field); + } + } + } +} + +void pdf_field_setValue(pdf_document *doc, pdf_obj *field, char *text) +{ + update_text_field_value(doc->ctx, field, text); + recalculate(doc); + pdf_field_mark_dirty(doc->ctx, field); +} + +char *pdf_field_getBorderStyle(pdf_document *doc, pdf_obj *field) +{ + char *bs = pdf_to_name(pdf_dict_getp(field, "BS/S")); + + switch (*bs) + { + case 'S': return "Solid"; + case 'D': return "Dashed"; + case 'B': return "Beveled"; + case 'I': return "Inset"; + case 'U': return "Underline"; + } + + return "Solid"; +} + +void pdf_field_setBorderStyle(pdf_document *doc, pdf_obj *field, char *text) +{ + fz_context *ctx = doc->ctx; + pdf_obj *val = NULL; + + if (!strcmp(text, "Solid")) + val = fz_new_name(ctx, "S"); + else if (!strcmp(text, "Dashed")) + val = fz_new_name(ctx, "D"); + else if (!strcmp(text, "Beveled")) + val = fz_new_name(ctx, "B"); + else if (!strcmp(text, "Inset")) + val = fz_new_name(ctx, "I"); + else if (!strcmp(text, "Underline")) + val = fz_new_name(ctx, "U"); + else + return; + + fz_try(ctx); + { + pdf_dict_putp(field, "BS/S", val); + pdf_field_mark_dirty(ctx, field); + } + fz_always(ctx) + { + pdf_drop_obj(val); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +void pdf_field_buttonSetCaption(pdf_document *doc, pdf_obj *field, char *text) +{ + fz_context *ctx = doc->ctx; + pdf_obj *val = pdf_new_string(ctx, text, strlen(text)); + + fz_try(ctx); + { + if (get_field_type(doc, field) == FZ_WIDGET_TYPE_PUSHBUTTON) + { + pdf_dict_putp(field, "MK/CA", val); + pdf_field_mark_dirty(ctx, field); + } + } + fz_always(ctx) + { + pdf_drop_obj(val); + } + fz_catch(ctx) + { + fz_rethrow(ctx); + } +} + +void pdf_field_setFillColor(pdf_document *doc, pdf_obj *field, pdf_obj *col) +{ + pdf_dict_putp(field, "MK/BG", col); + pdf_field_mark_dirty(doc->ctx, field); +} + +void pdf_field_setTextColor(pdf_document *doc, pdf_obj *field, pdf_obj *col) +{ + fz_context *ctx = doc->ctx; + da_info di; + fz_buffer *fzbuf = NULL; + char *da = pdf_to_str_buf(pdf_dict_gets(field, "DA")); + unsigned char *buf; + int len; + pdf_obj *daobj = NULL; + + memset(&di, 0, sizeof(di)); + + fz_var(fzbuf); + fz_var(di); + fz_var(daobj); + fz_try(ctx) + { + parse_da(ctx, da, &di); + di.col_size = 3; + di.col[0] = pdf_to_real(pdf_array_get(col, 0)); + di.col[1] = pdf_to_real(pdf_array_get(col, 1)); + di.col[2] = pdf_to_real(pdf_array_get(col, 2)); + fzbuf = fz_new_buffer(ctx, 0); + fzbuf_print_da(ctx, fzbuf, &di); + len = fz_buffer_storage(ctx, fzbuf, &buf); + daobj = pdf_new_string(ctx, (char *)buf, len); + pdf_dict_puts(field, "DA", daobj); + pdf_field_mark_dirty(ctx, field); + } + fz_always(ctx) + { + da_info_fin(ctx, &di); + fz_drop_buffer(ctx, fzbuf); + pdf_drop_obj(daobj); + } + fz_catch(ctx) + { + fz_warn(ctx, "%s", ctx->error->message); + } +} + +char *fz_widget_text_get_text(fz_widget_text *tw) +{ + pdf_document *doc = tw->super.doc; + fz_context *ctx = doc->ctx; + + fz_free(ctx, tw->text); + tw->text = NULL; + + fz_try(ctx) + { + tw->text = pdf_field_getValue(doc, tw->super.obj); + } + fz_catch(ctx) + { + fz_warn(ctx, "failed allocation in fz_widget_text_get_text"); + } + + return tw->text; +} + +void fz_widget_text_set_text(fz_widget_text *tw, char *text) +{ + fz_context *ctx = tw->super.doc->ctx; + + fz_try(ctx) + { + pdf_field_setValue(tw->super.doc, tw->super.obj, text); + fz_free(ctx, tw->text); + tw->text = fz_strdup(ctx, text); + } + fz_catch(ctx) + { + fz_warn(ctx, "fz_widget_text_set_text failed"); + } +} |