1030 lines
34 KiB
C
1030 lines
34 KiB
C
#include "nuklear.h"
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#include "nuklear_internal.h"
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/* ===============================================================
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*
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* TEXT EDITOR
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*
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* ===============================================================*/
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/* stb_textedit.h - v1.8 - public domain - Sean Barrett */
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struct nk_text_find {
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float x,y; /* position of n'th character */
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float height; /* height of line */
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int first_char, length; /* first char of row, and length */
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int prev_first; /*_ first char of previous row */
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};
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struct nk_text_edit_row {
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float x0,x1;
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/* starting x location, end x location (allows for align=right, etc) */
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float baseline_y_delta;
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/* position of baseline relative to previous row's baseline*/
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float ymin,ymax;
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/* height of row above and below baseline */
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int num_chars;
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};
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/* forward declarations */
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NK_INTERN void nk_textedit_makeundo_delete(struct nk_text_edit*, int, int);
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NK_INTERN void nk_textedit_makeundo_insert(struct nk_text_edit*, int, int);
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NK_INTERN void nk_textedit_makeundo_replace(struct nk_text_edit*, int, int, int);
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#define NK_TEXT_HAS_SELECTION(s) ((s)->select_start != (s)->select_end)
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NK_INTERN float
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nk_textedit_get_width(const struct nk_text_edit *edit, int line_start, int char_id,
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const struct nk_user_font *font)
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{
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int len = 0;
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nk_rune unicode = 0;
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const char *str = nk_str_at_const(&edit->string, line_start + char_id, &unicode, &len);
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return font->width(font->userdata, font->height, str, len);
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}
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NK_INTERN void
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nk_textedit_layout_row(struct nk_text_edit_row *r, struct nk_text_edit *edit,
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int line_start_id, float row_height, const struct nk_user_font *font)
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{
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int l;
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int glyphs = 0;
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nk_rune unicode;
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const char *remaining;
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int len = nk_str_len_char(&edit->string);
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const char *end = nk_str_get_const(&edit->string) + len;
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const char *text = nk_str_at_const(&edit->string, line_start_id, &unicode, &l);
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const struct nk_vec2 size = nk_text_calculate_text_bounds(font,
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text, (int)(end - text), row_height, &remaining, 0, &glyphs, NK_STOP_ON_NEW_LINE);
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r->x0 = 0.0f;
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r->x1 = size.x;
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r->baseline_y_delta = size.y;
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r->ymin = 0.0f;
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r->ymax = size.y;
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r->num_chars = glyphs;
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}
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NK_INTERN int
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nk_textedit_locate_coord(struct nk_text_edit *edit, float x, float y,
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const struct nk_user_font *font, float row_height)
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{
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struct nk_text_edit_row r;
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int n = edit->string.len;
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float base_y = 0, prev_x;
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int i=0, k;
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r.x0 = r.x1 = 0;
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r.ymin = r.ymax = 0;
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r.num_chars = 0;
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/* search rows to find one that straddles 'y' */
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while (i < n) {
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nk_textedit_layout_row(&r, edit, i, row_height, font);
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if (r.num_chars <= 0)
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return n;
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if (i==0 && y < base_y + r.ymin)
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return 0;
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if (y < base_y + r.ymax)
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break;
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i += r.num_chars;
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base_y += r.baseline_y_delta;
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}
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/* below all text, return 'after' last character */
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if (i >= n)
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return n;
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/* check if it's before the beginning of the line */
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if (x < r.x0)
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return i;
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/* check if it's before the end of the line */
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if (x < r.x1) {
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/* search characters in row for one that straddles 'x' */
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k = i;
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prev_x = r.x0;
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for (i=0; i < r.num_chars; ++i) {
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float w = nk_textedit_get_width(edit, k, i, font);
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if (x < prev_x+w) {
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if (x < prev_x+w/2)
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return k+i;
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else return k+i+1;
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}
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prev_x += w;
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}
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/* shouldn't happen, but if it does, fall through to end-of-line case */
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}
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/* if the last character is a newline, return that.
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* otherwise return 'after' the last character */
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if (nk_str_rune_at(&edit->string, i+r.num_chars-1) == '\n')
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return i+r.num_chars-1;
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else return i+r.num_chars;
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}
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NK_LIB void
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nk_textedit_click(struct nk_text_edit *state, float x, float y,
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const struct nk_user_font *font, float row_height)
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{
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/* API click: on mouse down, move the cursor to the clicked location,
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* and reset the selection */
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state->cursor = nk_textedit_locate_coord(state, x, y, font, row_height);
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state->select_start = state->cursor;
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state->select_end = state->cursor;
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state->has_preferred_x = 0;
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}
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NK_LIB void
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nk_textedit_drag(struct nk_text_edit *state, float x, float y,
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const struct nk_user_font *font, float row_height)
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{
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/* API drag: on mouse drag, move the cursor and selection endpoint
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* to the clicked location */
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int p = nk_textedit_locate_coord(state, x, y, font, row_height);
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if (state->select_start == state->select_end)
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state->select_start = state->cursor;
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state->cursor = state->select_end = p;
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}
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NK_INTERN void
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nk_textedit_find_charpos(struct nk_text_find *find, struct nk_text_edit *state,
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int n, int single_line, const struct nk_user_font *font, float row_height)
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{
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/* find the x/y location of a character, and remember info about the previous
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* row in case we get a move-up event (for page up, we'll have to rescan) */
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struct nk_text_edit_row r;
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int prev_start = 0;
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int z = state->string.len;
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int i=0, first;
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nk_zero_struct(r);
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if (n == z) {
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/* if it's at the end, then find the last line -- simpler than trying to
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explicitly handle this case in the regular code */
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nk_textedit_layout_row(&r, state, 0, row_height, font);
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if (single_line) {
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find->first_char = 0;
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find->length = z;
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} else {
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while (i < z) {
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prev_start = i;
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i += r.num_chars;
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nk_textedit_layout_row(&r, state, i, row_height, font);
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}
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find->first_char = i;
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find->length = r.num_chars;
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}
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find->x = r.x1;
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find->y = r.ymin;
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find->height = r.ymax - r.ymin;
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find->prev_first = prev_start;
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return;
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}
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/* search rows to find the one that straddles character n */
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find->y = 0;
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for(;;) {
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nk_textedit_layout_row(&r, state, i, row_height, font);
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if (n < i + r.num_chars) break;
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prev_start = i;
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i += r.num_chars;
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find->y += r.baseline_y_delta;
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}
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find->first_char = first = i;
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find->length = r.num_chars;
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find->height = r.ymax - r.ymin;
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find->prev_first = prev_start;
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/* now scan to find xpos */
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find->x = r.x0;
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for (i=0; first+i < n; ++i)
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find->x += nk_textedit_get_width(state, first, i, font);
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}
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NK_INTERN void
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nk_textedit_clamp(struct nk_text_edit *state)
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{
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/* make the selection/cursor state valid if client altered the string */
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int n = state->string.len;
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if (NK_TEXT_HAS_SELECTION(state)) {
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if (state->select_start > n) state->select_start = n;
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if (state->select_end > n) state->select_end = n;
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/* if clamping forced them to be equal, move the cursor to match */
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if (state->select_start == state->select_end)
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state->cursor = state->select_start;
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}
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if (state->cursor > n) state->cursor = n;
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}
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NK_API void
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nk_textedit_delete(struct nk_text_edit *state, int where, int len)
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{
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/* delete characters while updating undo */
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nk_textedit_makeundo_delete(state, where, len);
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nk_str_delete_runes(&state->string, where, len);
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state->has_preferred_x = 0;
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}
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NK_API void
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nk_textedit_delete_selection(struct nk_text_edit *state)
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{
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/* delete the section */
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nk_textedit_clamp(state);
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if (NK_TEXT_HAS_SELECTION(state)) {
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if (state->select_start < state->select_end) {
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nk_textedit_delete(state, state->select_start,
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state->select_end - state->select_start);
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state->select_end = state->cursor = state->select_start;
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} else {
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nk_textedit_delete(state, state->select_end,
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state->select_start - state->select_end);
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state->select_start = state->cursor = state->select_end;
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}
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state->has_preferred_x = 0;
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}
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}
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NK_INTERN void
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nk_textedit_sortselection(struct nk_text_edit *state)
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{
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/* canonicalize the selection so start <= end */
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if (state->select_end < state->select_start) {
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int temp = state->select_end;
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state->select_end = state->select_start;
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state->select_start = temp;
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}
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}
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NK_INTERN void
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nk_textedit_move_to_first(struct nk_text_edit *state)
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{
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/* move cursor to first character of selection */
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if (NK_TEXT_HAS_SELECTION(state)) {
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nk_textedit_sortselection(state);
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state->cursor = state->select_start;
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state->select_end = state->select_start;
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state->has_preferred_x = 0;
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}
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}
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NK_INTERN void
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nk_textedit_move_to_last(struct nk_text_edit *state)
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{
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/* move cursor to last character of selection */
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if (NK_TEXT_HAS_SELECTION(state)) {
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nk_textedit_sortselection(state);
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nk_textedit_clamp(state);
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state->cursor = state->select_end;
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state->select_start = state->select_end;
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state->has_preferred_x = 0;
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}
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}
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NK_INTERN int
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nk_is_word_boundary( struct nk_text_edit *state, int idx)
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{
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int len;
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nk_rune c;
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if (idx <= 0) return 1;
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if (!nk_str_at_rune(&state->string, idx, &c, &len)) return 1;
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return (c == ' ' || c == '\t' ||c == 0x3000 || c == ',' || c == ';' ||
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c == '(' || c == ')' || c == '{' || c == '}' || c == '[' || c == ']' ||
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c == '|');
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}
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NK_INTERN int
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nk_textedit_move_to_word_previous(struct nk_text_edit *state)
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{
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int c = state->cursor - 1;
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while( c >= 0 && !nk_is_word_boundary(state, c))
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--c;
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if( c < 0 )
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c = 0;
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return c;
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}
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NK_INTERN int
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nk_textedit_move_to_word_next(struct nk_text_edit *state)
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{
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const int len = state->string.len;
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int c = state->cursor+1;
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while( c < len && !nk_is_word_boundary(state, c))
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++c;
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if( c > len )
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c = len;
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return c;
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}
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NK_INTERN void
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nk_textedit_prep_selection_at_cursor(struct nk_text_edit *state)
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{
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/* update selection and cursor to match each other */
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if (!NK_TEXT_HAS_SELECTION(state))
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state->select_start = state->select_end = state->cursor;
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else state->cursor = state->select_end;
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}
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NK_API nk_bool
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nk_textedit_cut(struct nk_text_edit *state)
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{
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/* API cut: delete selection */
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if (state->mode == NK_TEXT_EDIT_MODE_VIEW)
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return 0;
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if (NK_TEXT_HAS_SELECTION(state)) {
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nk_textedit_delete_selection(state); /* implicitly clamps */
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state->has_preferred_x = 0;
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return 1;
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}
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return 0;
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}
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NK_API nk_bool
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nk_textedit_paste(struct nk_text_edit *state, char const *ctext, int len)
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{
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/* API paste: replace existing selection with passed-in text */
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int glyphs;
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const char *text = (const char *) ctext;
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if (state->mode == NK_TEXT_EDIT_MODE_VIEW) return 0;
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/* if there's a selection, the paste should delete it */
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nk_textedit_clamp(state);
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nk_textedit_delete_selection(state);
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/* try to insert the characters */
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glyphs = nk_utf_len(ctext, len);
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if (nk_str_insert_text_char(&state->string, state->cursor, text, len)) {
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nk_textedit_makeundo_insert(state, state->cursor, glyphs);
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state->cursor += len;
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state->has_preferred_x = 0;
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return 1;
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}
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/* remove the undo since we didn't actually insert the characters */
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if (state->undo.undo_point)
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--state->undo.undo_point;
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return 0;
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}
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NK_API void
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nk_textedit_text(struct nk_text_edit *state, const char *text, int total_len)
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{
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nk_rune unicode;
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int glyph_len;
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int text_len = 0;
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NK_ASSERT(state);
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NK_ASSERT(text);
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if (!text || !total_len || state->mode == NK_TEXT_EDIT_MODE_VIEW) return;
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glyph_len = nk_utf_decode(text, &unicode, total_len);
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while ((text_len < total_len) && glyph_len)
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{
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/* don't insert a backward delete, just process the event */
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if (unicode == 127) goto next;
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/* can't add newline in single-line mode */
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if (unicode == '\n' && state->single_line) goto next;
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/* filter incoming text */
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if (state->filter && !state->filter(state, unicode)) goto next;
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if (!NK_TEXT_HAS_SELECTION(state) &&
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state->cursor < state->string.len)
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{
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if (state->mode == NK_TEXT_EDIT_MODE_REPLACE) {
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nk_textedit_makeundo_replace(state, state->cursor, 1, 1);
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nk_str_delete_runes(&state->string, state->cursor, 1);
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}
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if (nk_str_insert_text_utf8(&state->string, state->cursor,
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text+text_len, 1))
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{
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++state->cursor;
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state->has_preferred_x = 0;
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}
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} else {
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nk_textedit_delete_selection(state); /* implicitly clamps */
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if (nk_str_insert_text_utf8(&state->string, state->cursor,
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text+text_len, 1))
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{
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nk_textedit_makeundo_insert(state, state->cursor, 1);
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++state->cursor;
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state->has_preferred_x = 0;
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}
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}
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next:
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text_len += glyph_len;
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glyph_len = nk_utf_decode(text + text_len, &unicode, total_len-text_len);
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}
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}
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NK_LIB void
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nk_textedit_key(struct nk_text_edit *state, enum nk_keys key, int shift_mod,
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const struct nk_user_font *font, float row_height)
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{
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retry:
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switch (key)
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{
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case NK_KEY_NONE:
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case NK_KEY_CTRL:
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case NK_KEY_ENTER:
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case NK_KEY_SHIFT:
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case NK_KEY_TAB:
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case NK_KEY_COPY:
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case NK_KEY_CUT:
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case NK_KEY_PASTE:
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case NK_KEY_MAX:
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default: break;
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case NK_KEY_TEXT_UNDO:
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nk_textedit_undo(state);
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state->has_preferred_x = 0;
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break;
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case NK_KEY_TEXT_REDO:
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nk_textedit_redo(state);
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state->has_preferred_x = 0;
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break;
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case NK_KEY_TEXT_SELECT_ALL:
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nk_textedit_select_all(state);
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state->has_preferred_x = 0;
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break;
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case NK_KEY_TEXT_INSERT_MODE:
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if (state->mode == NK_TEXT_EDIT_MODE_VIEW)
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state->mode = NK_TEXT_EDIT_MODE_INSERT;
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break;
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case NK_KEY_TEXT_REPLACE_MODE:
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if (state->mode == NK_TEXT_EDIT_MODE_VIEW)
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state->mode = NK_TEXT_EDIT_MODE_REPLACE;
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break;
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case NK_KEY_TEXT_RESET_MODE:
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if (state->mode == NK_TEXT_EDIT_MODE_INSERT ||
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state->mode == NK_TEXT_EDIT_MODE_REPLACE)
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state->mode = NK_TEXT_EDIT_MODE_VIEW;
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break;
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case NK_KEY_LEFT:
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if (shift_mod) {
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nk_textedit_clamp(state);
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nk_textedit_prep_selection_at_cursor(state);
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/* move selection left */
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if (state->select_end > 0)
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--state->select_end;
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state->cursor = state->select_end;
|
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state->has_preferred_x = 0;
|
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} else {
|
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/* if currently there's a selection,
|
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* move cursor to start of selection */
|
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if (NK_TEXT_HAS_SELECTION(state))
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nk_textedit_move_to_first(state);
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else if (state->cursor > 0)
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--state->cursor;
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state->has_preferred_x = 0;
|
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} break;
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|
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case NK_KEY_RIGHT:
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if (shift_mod) {
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nk_textedit_prep_selection_at_cursor(state);
|
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/* move selection right */
|
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++state->select_end;
|
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nk_textedit_clamp(state);
|
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state->cursor = state->select_end;
|
|
state->has_preferred_x = 0;
|
|
} else {
|
|
/* if currently there's a selection,
|
|
* move cursor to end of selection */
|
|
if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_move_to_last(state);
|
|
else ++state->cursor;
|
|
nk_textedit_clamp(state);
|
|
state->has_preferred_x = 0;
|
|
} break;
|
|
|
|
case NK_KEY_TEXT_WORD_LEFT:
|
|
if (shift_mod) {
|
|
if( !NK_TEXT_HAS_SELECTION( state ) )
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
state->cursor = nk_textedit_move_to_word_previous(state);
|
|
state->select_end = state->cursor;
|
|
nk_textedit_clamp(state );
|
|
} else {
|
|
if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_move_to_first(state);
|
|
else {
|
|
state->cursor = nk_textedit_move_to_word_previous(state);
|
|
nk_textedit_clamp(state );
|
|
}
|
|
} break;
|
|
|
|
case NK_KEY_TEXT_WORD_RIGHT:
|
|
if (shift_mod) {
|
|
if( !NK_TEXT_HAS_SELECTION( state ) )
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
state->cursor = nk_textedit_move_to_word_next(state);
|
|
state->select_end = state->cursor;
|
|
nk_textedit_clamp(state);
|
|
} else {
|
|
if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_move_to_last(state);
|
|
else {
|
|
state->cursor = nk_textedit_move_to_word_next(state);
|
|
nk_textedit_clamp(state );
|
|
}
|
|
} break;
|
|
|
|
case NK_KEY_DOWN: {
|
|
struct nk_text_find find;
|
|
struct nk_text_edit_row row;
|
|
int i, sel = shift_mod;
|
|
|
|
if (state->single_line) {
|
|
/* on windows, up&down in single-line behave like left&right */
|
|
key = NK_KEY_RIGHT;
|
|
goto retry;
|
|
}
|
|
|
|
if (sel)
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
else if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_move_to_last(state);
|
|
|
|
/* compute current position of cursor point */
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_find_charpos(&find, state, state->cursor, state->single_line,
|
|
font, row_height);
|
|
|
|
/* now find character position down a row */
|
|
if (find.length)
|
|
{
|
|
float x;
|
|
float goal_x = state->has_preferred_x ? state->preferred_x : find.x;
|
|
int start = find.first_char + find.length;
|
|
|
|
state->cursor = start;
|
|
nk_textedit_layout_row(&row, state, state->cursor, row_height, font);
|
|
x = row.x0;
|
|
|
|
for (i=0; i < row.num_chars && x < row.x1; ++i) {
|
|
float dx = nk_textedit_get_width(state, start, i, font);
|
|
x += dx;
|
|
if (x > goal_x)
|
|
break;
|
|
++state->cursor;
|
|
}
|
|
nk_textedit_clamp(state);
|
|
|
|
state->has_preferred_x = 1;
|
|
state->preferred_x = goal_x;
|
|
if (sel)
|
|
state->select_end = state->cursor;
|
|
}
|
|
} break;
|
|
|
|
case NK_KEY_UP: {
|
|
struct nk_text_find find;
|
|
struct nk_text_edit_row row;
|
|
int i, sel = shift_mod;
|
|
|
|
if (state->single_line) {
|
|
/* on windows, up&down become left&right */
|
|
key = NK_KEY_LEFT;
|
|
goto retry;
|
|
}
|
|
|
|
if (sel)
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
else if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_move_to_first(state);
|
|
|
|
/* compute current position of cursor point */
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_find_charpos(&find, state, state->cursor, state->single_line,
|
|
font, row_height);
|
|
|
|
/* can only go up if there's a previous row */
|
|
if (find.prev_first != find.first_char) {
|
|
/* now find character position up a row */
|
|
float x;
|
|
float goal_x = state->has_preferred_x ? state->preferred_x : find.x;
|
|
|
|
state->cursor = find.prev_first;
|
|
nk_textedit_layout_row(&row, state, state->cursor, row_height, font);
|
|
x = row.x0;
|
|
|
|
for (i=0; i < row.num_chars && x < row.x1; ++i) {
|
|
float dx = nk_textedit_get_width(state, find.prev_first, i, font);
|
|
x += dx;
|
|
if (x > goal_x)
|
|
break;
|
|
++state->cursor;
|
|
}
|
|
nk_textedit_clamp(state);
|
|
|
|
state->has_preferred_x = 1;
|
|
state->preferred_x = goal_x;
|
|
if (sel) state->select_end = state->cursor;
|
|
}
|
|
} break;
|
|
|
|
case NK_KEY_DEL:
|
|
if (state->mode == NK_TEXT_EDIT_MODE_VIEW)
|
|
break;
|
|
if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_delete_selection(state);
|
|
else {
|
|
int n = state->string.len;
|
|
if (state->cursor < n)
|
|
nk_textedit_delete(state, state->cursor, 1);
|
|
}
|
|
state->has_preferred_x = 0;
|
|
break;
|
|
|
|
case NK_KEY_BACKSPACE:
|
|
if (state->mode == NK_TEXT_EDIT_MODE_VIEW)
|
|
break;
|
|
if (NK_TEXT_HAS_SELECTION(state))
|
|
nk_textedit_delete_selection(state);
|
|
else {
|
|
nk_textedit_clamp(state);
|
|
if (state->cursor > 0) {
|
|
nk_textedit_delete(state, state->cursor-1, 1);
|
|
--state->cursor;
|
|
}
|
|
}
|
|
state->has_preferred_x = 0;
|
|
break;
|
|
|
|
case NK_KEY_TEXT_START:
|
|
if (shift_mod) {
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
state->cursor = state->select_end = 0;
|
|
state->has_preferred_x = 0;
|
|
} else {
|
|
state->cursor = state->select_start = state->select_end = 0;
|
|
state->has_preferred_x = 0;
|
|
}
|
|
break;
|
|
|
|
case NK_KEY_TEXT_END:
|
|
if (shift_mod) {
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
state->cursor = state->select_end = state->string.len;
|
|
state->has_preferred_x = 0;
|
|
} else {
|
|
state->cursor = state->string.len;
|
|
state->select_start = state->select_end = 0;
|
|
state->has_preferred_x = 0;
|
|
}
|
|
break;
|
|
|
|
case NK_KEY_TEXT_LINE_START: {
|
|
if (shift_mod) {
|
|
struct nk_text_find find;
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
if (state->string.len && state->cursor == state->string.len)
|
|
--state->cursor;
|
|
nk_textedit_find_charpos(&find, state,state->cursor, state->single_line,
|
|
font, row_height);
|
|
state->cursor = state->select_end = find.first_char;
|
|
state->has_preferred_x = 0;
|
|
} else {
|
|
struct nk_text_find find;
|
|
if (state->string.len && state->cursor == state->string.len)
|
|
--state->cursor;
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_move_to_first(state);
|
|
nk_textedit_find_charpos(&find, state, state->cursor, state->single_line,
|
|
font, row_height);
|
|
state->cursor = find.first_char;
|
|
state->has_preferred_x = 0;
|
|
}
|
|
} break;
|
|
|
|
case NK_KEY_TEXT_LINE_END: {
|
|
if (shift_mod) {
|
|
struct nk_text_find find;
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_prep_selection_at_cursor(state);
|
|
nk_textedit_find_charpos(&find, state, state->cursor, state->single_line,
|
|
font, row_height);
|
|
state->has_preferred_x = 0;
|
|
state->cursor = find.first_char + find.length;
|
|
if (find.length > 0 && nk_str_rune_at(&state->string, state->cursor-1) == '\n')
|
|
--state->cursor;
|
|
state->select_end = state->cursor;
|
|
} else {
|
|
struct nk_text_find find;
|
|
nk_textedit_clamp(state);
|
|
nk_textedit_move_to_first(state);
|
|
nk_textedit_find_charpos(&find, state, state->cursor, state->single_line,
|
|
font, row_height);
|
|
|
|
state->has_preferred_x = 0;
|
|
state->cursor = find.first_char + find.length;
|
|
if (find.length > 0 && nk_str_rune_at(&state->string, state->cursor-1) == '\n')
|
|
--state->cursor;
|
|
}} break;
|
|
}
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_flush_redo(struct nk_text_undo_state *state)
|
|
{
|
|
state->redo_point = NK_TEXTEDIT_UNDOSTATECOUNT;
|
|
state->redo_char_point = NK_TEXTEDIT_UNDOCHARCOUNT;
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_discard_undo(struct nk_text_undo_state *state)
|
|
{
|
|
/* discard the oldest entry in the undo list */
|
|
if (state->undo_point > 0) {
|
|
/* if the 0th undo state has characters, clean those up */
|
|
if (state->undo_rec[0].char_storage >= 0) {
|
|
int n = state->undo_rec[0].insert_length, i;
|
|
/* delete n characters from all other records */
|
|
state->undo_char_point = (short)(state->undo_char_point - n);
|
|
NK_MEMCPY(state->undo_char, state->undo_char + n,
|
|
(nk_size)state->undo_char_point*sizeof(nk_rune));
|
|
for (i=0; i < state->undo_point; ++i) {
|
|
if (state->undo_rec[i].char_storage >= 0)
|
|
state->undo_rec[i].char_storage = (short)
|
|
(state->undo_rec[i].char_storage - n);
|
|
}
|
|
}
|
|
--state->undo_point;
|
|
NK_MEMCPY(state->undo_rec, state->undo_rec+1,
|
|
(nk_size)((nk_size)state->undo_point * sizeof(state->undo_rec[0])));
|
|
}
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_discard_redo(struct nk_text_undo_state *state)
|
|
{
|
|
/* discard the oldest entry in the redo list--it's bad if this
|
|
ever happens, but because undo & redo have to store the actual
|
|
characters in different cases, the redo character buffer can
|
|
fill up even though the undo buffer didn't */
|
|
nk_size num;
|
|
int k = NK_TEXTEDIT_UNDOSTATECOUNT-1;
|
|
if (state->redo_point <= k) {
|
|
/* if the k'th undo state has characters, clean those up */
|
|
if (state->undo_rec[k].char_storage >= 0) {
|
|
int n = state->undo_rec[k].insert_length, i;
|
|
/* delete n characters from all other records */
|
|
state->redo_char_point = (short)(state->redo_char_point + n);
|
|
num = (nk_size)(NK_TEXTEDIT_UNDOCHARCOUNT - state->redo_char_point);
|
|
NK_MEMCPY(state->undo_char + state->redo_char_point,
|
|
state->undo_char + state->redo_char_point-n, num * sizeof(char));
|
|
for (i = state->redo_point; i < k; ++i) {
|
|
if (state->undo_rec[i].char_storage >= 0) {
|
|
state->undo_rec[i].char_storage = (short)
|
|
(state->undo_rec[i].char_storage + n);
|
|
}
|
|
}
|
|
}
|
|
++state->redo_point;
|
|
num = (nk_size)(NK_TEXTEDIT_UNDOSTATECOUNT - state->redo_point);
|
|
if (num) NK_MEMCPY(state->undo_rec + state->redo_point-1,
|
|
state->undo_rec + state->redo_point, num * sizeof(state->undo_rec[0]));
|
|
}
|
|
}
|
|
NK_INTERN struct nk_text_undo_record*
|
|
nk_textedit_create_undo_record(struct nk_text_undo_state *state, int numchars)
|
|
{
|
|
/* any time we create a new undo record, we discard redo*/
|
|
nk_textedit_flush_redo(state);
|
|
|
|
/* if we have no free records, we have to make room,
|
|
* by sliding the existing records down */
|
|
if (state->undo_point == NK_TEXTEDIT_UNDOSTATECOUNT)
|
|
nk_textedit_discard_undo(state);
|
|
|
|
/* if the characters to store won't possibly fit in the buffer,
|
|
* we can't undo */
|
|
if (numchars > NK_TEXTEDIT_UNDOCHARCOUNT) {
|
|
state->undo_point = 0;
|
|
state->undo_char_point = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* if we don't have enough free characters in the buffer,
|
|
* we have to make room */
|
|
while (state->undo_char_point + numchars > NK_TEXTEDIT_UNDOCHARCOUNT)
|
|
nk_textedit_discard_undo(state);
|
|
return &state->undo_rec[state->undo_point++];
|
|
}
|
|
NK_INTERN nk_rune*
|
|
nk_textedit_createundo(struct nk_text_undo_state *state, int pos,
|
|
int insert_len, int delete_len)
|
|
{
|
|
struct nk_text_undo_record *r = nk_textedit_create_undo_record(state, insert_len);
|
|
if (r == 0)
|
|
return 0;
|
|
|
|
r->where = pos;
|
|
r->insert_length = (short) insert_len;
|
|
r->delete_length = (short) delete_len;
|
|
|
|
if (insert_len == 0) {
|
|
r->char_storage = -1;
|
|
return 0;
|
|
} else {
|
|
r->char_storage = state->undo_char_point;
|
|
state->undo_char_point = (short)(state->undo_char_point + insert_len);
|
|
return &state->undo_char[r->char_storage];
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_textedit_undo(struct nk_text_edit *state)
|
|
{
|
|
struct nk_text_undo_state *s = &state->undo;
|
|
struct nk_text_undo_record u, *r;
|
|
if (s->undo_point == 0)
|
|
return;
|
|
|
|
/* we need to do two things: apply the undo record, and create a redo record */
|
|
u = s->undo_rec[s->undo_point-1];
|
|
r = &s->undo_rec[s->redo_point-1];
|
|
r->char_storage = -1;
|
|
|
|
r->insert_length = u.delete_length;
|
|
r->delete_length = u.insert_length;
|
|
r->where = u.where;
|
|
|
|
if (u.delete_length)
|
|
{
|
|
/* if the undo record says to delete characters, then the redo record will
|
|
need to re-insert the characters that get deleted, so we need to store
|
|
them.
|
|
there are three cases:
|
|
- there's enough room to store the characters
|
|
- characters stored for *redoing* don't leave room for redo
|
|
- characters stored for *undoing* don't leave room for redo
|
|
if the last is true, we have to bail */
|
|
if (s->undo_char_point + u.delete_length >= NK_TEXTEDIT_UNDOCHARCOUNT) {
|
|
/* the undo records take up too much character space; there's no space
|
|
* to store the redo characters */
|
|
r->insert_length = 0;
|
|
} else {
|
|
int i;
|
|
/* there's definitely room to store the characters eventually */
|
|
while (s->undo_char_point + u.delete_length > s->redo_char_point) {
|
|
/* there's currently not enough room, so discard a redo record */
|
|
nk_textedit_discard_redo(s);
|
|
/* should never happen: */
|
|
if (s->redo_point == NK_TEXTEDIT_UNDOSTATECOUNT)
|
|
return;
|
|
}
|
|
|
|
r = &s->undo_rec[s->redo_point-1];
|
|
r->char_storage = (short)(s->redo_char_point - u.delete_length);
|
|
s->redo_char_point = (short)(s->redo_char_point - u.delete_length);
|
|
|
|
/* now save the characters */
|
|
for (i=0; i < u.delete_length; ++i)
|
|
s->undo_char[r->char_storage + i] =
|
|
nk_str_rune_at(&state->string, u.where + i);
|
|
}
|
|
/* now we can carry out the deletion */
|
|
nk_str_delete_runes(&state->string, u.where, u.delete_length);
|
|
}
|
|
|
|
/* check type of recorded action: */
|
|
if (u.insert_length) {
|
|
/* easy case: was a deletion, so we need to insert n characters */
|
|
nk_str_insert_text_runes(&state->string, u.where,
|
|
&s->undo_char[u.char_storage], u.insert_length);
|
|
s->undo_char_point = (short)(s->undo_char_point - u.insert_length);
|
|
}
|
|
state->cursor = (short)(u.where + u.insert_length);
|
|
|
|
s->undo_point--;
|
|
s->redo_point--;
|
|
}
|
|
NK_API void
|
|
nk_textedit_redo(struct nk_text_edit *state)
|
|
{
|
|
struct nk_text_undo_state *s = &state->undo;
|
|
struct nk_text_undo_record *u, r;
|
|
if (s->redo_point == NK_TEXTEDIT_UNDOSTATECOUNT)
|
|
return;
|
|
|
|
/* we need to do two things: apply the redo record, and create an undo record */
|
|
u = &s->undo_rec[s->undo_point];
|
|
r = s->undo_rec[s->redo_point];
|
|
|
|
/* we KNOW there must be room for the undo record, because the redo record
|
|
was derived from an undo record */
|
|
u->delete_length = r.insert_length;
|
|
u->insert_length = r.delete_length;
|
|
u->where = r.where;
|
|
u->char_storage = -1;
|
|
|
|
if (r.delete_length) {
|
|
/* the redo record requires us to delete characters, so the undo record
|
|
needs to store the characters */
|
|
if (s->undo_char_point + u->insert_length > s->redo_char_point) {
|
|
u->insert_length = 0;
|
|
u->delete_length = 0;
|
|
} else {
|
|
int i;
|
|
u->char_storage = s->undo_char_point;
|
|
s->undo_char_point = (short)(s->undo_char_point + u->insert_length);
|
|
|
|
/* now save the characters */
|
|
for (i=0; i < u->insert_length; ++i) {
|
|
s->undo_char[u->char_storage + i] =
|
|
nk_str_rune_at(&state->string, u->where + i);
|
|
}
|
|
}
|
|
nk_str_delete_runes(&state->string, r.where, r.delete_length);
|
|
}
|
|
|
|
if (r.insert_length) {
|
|
/* easy case: need to insert n characters */
|
|
nk_str_insert_text_runes(&state->string, r.where,
|
|
&s->undo_char[r.char_storage], r.insert_length);
|
|
}
|
|
state->cursor = r.where + r.insert_length;
|
|
|
|
s->undo_point++;
|
|
s->redo_point++;
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_makeundo_insert(struct nk_text_edit *state, int where, int length)
|
|
{
|
|
nk_textedit_createundo(&state->undo, where, 0, length);
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_makeundo_delete(struct nk_text_edit *state, int where, int length)
|
|
{
|
|
int i;
|
|
nk_rune *p = nk_textedit_createundo(&state->undo, where, length, 0);
|
|
if (p) {
|
|
for (i=0; i < length; ++i)
|
|
p[i] = nk_str_rune_at(&state->string, where+i);
|
|
}
|
|
}
|
|
NK_INTERN void
|
|
nk_textedit_makeundo_replace(struct nk_text_edit *state, int where,
|
|
int old_length, int new_length)
|
|
{
|
|
int i;
|
|
nk_rune *p = nk_textedit_createundo(&state->undo, where, old_length, new_length);
|
|
if (p) {
|
|
for (i=0; i < old_length; ++i)
|
|
p[i] = nk_str_rune_at(&state->string, where+i);
|
|
}
|
|
}
|
|
NK_LIB void
|
|
nk_textedit_clear_state(struct nk_text_edit *state, enum nk_text_edit_type type,
|
|
nk_plugin_filter filter)
|
|
{
|
|
/* reset the state to default */
|
|
state->undo.undo_point = 0;
|
|
state->undo.undo_char_point = 0;
|
|
state->undo.redo_point = NK_TEXTEDIT_UNDOSTATECOUNT;
|
|
state->undo.redo_char_point = NK_TEXTEDIT_UNDOCHARCOUNT;
|
|
state->select_end = state->select_start = 0;
|
|
state->cursor = 0;
|
|
state->has_preferred_x = 0;
|
|
state->preferred_x = 0;
|
|
state->cursor_at_end_of_line = 0;
|
|
state->initialized = 1;
|
|
state->single_line = (unsigned char)(type == NK_TEXT_EDIT_SINGLE_LINE);
|
|
state->mode = NK_TEXT_EDIT_MODE_VIEW;
|
|
state->filter = filter;
|
|
state->scrollbar = nk_vec2(0,0);
|
|
}
|
|
NK_API void
|
|
nk_textedit_init_fixed(struct nk_text_edit *state, void *memory, nk_size size)
|
|
{
|
|
NK_ASSERT(state);
|
|
NK_ASSERT(memory);
|
|
if (!state || !memory || !size) return;
|
|
NK_MEMSET(state, 0, sizeof(struct nk_text_edit));
|
|
nk_textedit_clear_state(state, NK_TEXT_EDIT_SINGLE_LINE, 0);
|
|
nk_str_init_fixed(&state->string, memory, size);
|
|
}
|
|
NK_API void
|
|
nk_textedit_init(struct nk_text_edit *state, struct nk_allocator *alloc, nk_size size)
|
|
{
|
|
NK_ASSERT(state);
|
|
NK_ASSERT(alloc);
|
|
if (!state || !alloc) return;
|
|
NK_MEMSET(state, 0, sizeof(struct nk_text_edit));
|
|
nk_textedit_clear_state(state, NK_TEXT_EDIT_SINGLE_LINE, 0);
|
|
nk_str_init(&state->string, alloc, size);
|
|
}
|
|
#ifdef NK_INCLUDE_DEFAULT_ALLOCATOR
|
|
NK_API void
|
|
nk_textedit_init_default(struct nk_text_edit *state)
|
|
{
|
|
NK_ASSERT(state);
|
|
if (!state) return;
|
|
NK_MEMSET(state, 0, sizeof(struct nk_text_edit));
|
|
nk_textedit_clear_state(state, NK_TEXT_EDIT_SINGLE_LINE, 0);
|
|
nk_str_init_default(&state->string);
|
|
}
|
|
#endif
|
|
NK_API void
|
|
nk_textedit_select_all(struct nk_text_edit *state)
|
|
{
|
|
NK_ASSERT(state);
|
|
state->select_start = 0;
|
|
state->select_end = state->string.len;
|
|
}
|
|
NK_API void
|
|
nk_textedit_free(struct nk_text_edit *state)
|
|
{
|
|
NK_ASSERT(state);
|
|
if (!state) return;
|
|
nk_str_free(&state->string);
|
|
}
|
|
|