diff options
Diffstat (limited to 'src/nvim/drawline.c')
| -rw-r--r-- | src/nvim/drawline.c | 2706 |
1 files changed, 2706 insertions, 0 deletions
diff --git a/src/nvim/drawline.c b/src/nvim/drawline.c new file mode 100644 index 0000000000..95026ff8ed --- /dev/null +++ b/src/nvim/drawline.c @@ -0,0 +1,2706 @@ +// This is an open source non-commercial project. Dear PVS-Studio, please check +// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + +// drawline.c: Functions for drawing window lines on the screen. +// This is the middle level, drawscreen.c is the top and grid.c/screen.c the lower level. + +#include <assert.h> +#include <inttypes.h> +#include <stdbool.h> +#include <string.h> + +#include "nvim/arabic.h" +#include "nvim/buffer.h" +#include "nvim/charset.h" +#include "nvim/cursor.h" +#include "nvim/cursor_shape.h" +#include "nvim/diff.h" +#include "nvim/drawline.h" +#include "nvim/fold.h" +#include "nvim/grid.h" +#include "nvim/highlight.h" +#include "nvim/highlight_group.h" +#include "nvim/indent.h" +#include "nvim/match.h" +#include "nvim/move.h" +#include "nvim/option.h" +#include "nvim/plines.h" +#include "nvim/quickfix.h" +#include "nvim/search.h" +#include "nvim/sign.h" +#include "nvim/spell.h" +#include "nvim/state.h" +#include "nvim/syntax.h" +#include "nvim/undo.h" +#include "nvim/window.h" + +#define MB_FILLER_CHAR '<' // character used when a double-width character + // doesn't fit. + +/// for line_putchar. Contains the state that needs to be remembered from +/// putting one character to the next. +typedef struct { + const char *p; + int prev_c; ///< previous Arabic character + int prev_c1; ///< first composing char for prev_c +} LineState; +#define LINE_STATE(p) { p, 0, 0 } + +#ifdef INCLUDE_GENERATED_DECLARATIONS +# include "drawline.c.generated.h" +#endif + +/// Advance **color_cols +/// +/// @return true when there are columns to draw. +static bool advance_color_col(int vcol, int **color_cols) +{ + while (**color_cols >= 0 && vcol > **color_cols) { + (*color_cols)++; + } + return **color_cols >= 0; +} + +/// Used when 'cursorlineopt' contains "screenline": compute the margins between +/// which the highlighting is used. +static void margin_columns_win(win_T *wp, int *left_col, int *right_col) +{ + // cache previous calculations depending on w_virtcol + static int saved_w_virtcol; + static win_T *prev_wp; + static int prev_left_col; + static int prev_right_col; + static int prev_col_off; + + int cur_col_off = win_col_off(wp); + int width1; + int width2; + + if (saved_w_virtcol == wp->w_virtcol && prev_wp == wp + && prev_col_off == cur_col_off) { + *right_col = prev_right_col; + *left_col = prev_left_col; + return; + } + + width1 = wp->w_width - cur_col_off; + width2 = width1 + win_col_off2(wp); + + *left_col = 0; + *right_col = width1; + + if (wp->w_virtcol >= (colnr_T)width1) { + *right_col = width1 + ((wp->w_virtcol - width1) / width2 + 1) * width2; + } + if (wp->w_virtcol >= (colnr_T)width1 && width2 > 0) { + *left_col = (wp->w_virtcol - width1) / width2 * width2 + width1; + } + + // cache values + prev_left_col = *left_col; + prev_right_col = *right_col; + prev_wp = wp; + saved_w_virtcol = wp->w_virtcol; + prev_col_off = cur_col_off; +} + +/// Put a single char from an UTF-8 buffer into a line buffer. +/// +/// Handles composing chars and arabic shaping state. +static int line_putchar(buf_T *buf, LineState *s, schar_T *dest, int maxcells, bool rl, int vcol) +{ + const char_u *p = (char_u *)s->p; + int cells = utf_ptr2cells((char *)p); + int c_len = utfc_ptr2len((char *)p); + int u8c, u8cc[MAX_MCO]; + if (cells > maxcells) { + return -1; + } + u8c = utfc_ptr2char(p, u8cc); + if (*p == TAB) { + cells = MIN(tabstop_padding(vcol, buf->b_p_ts, buf->b_p_vts_array), maxcells); + for (int c = 0; c < cells; c++) { + schar_from_ascii(dest[c], ' '); + } + goto done; + } else if (*p < 0x80 && u8cc[0] == 0) { + schar_from_ascii(dest[0], (char)(*p)); + s->prev_c = u8c; + } else { + if (p_arshape && !p_tbidi && ARABIC_CHAR(u8c)) { + // Do Arabic shaping. + int pc, pc1, nc; + int pcc[MAX_MCO]; + int firstbyte = *p; + + // The idea of what is the previous and next + // character depends on 'rightleft'. + if (rl) { + pc = s->prev_c; + pc1 = s->prev_c1; + nc = utf_ptr2char((char *)p + c_len); + s->prev_c1 = u8cc[0]; + } else { + pc = utfc_ptr2char(p + c_len, pcc); + nc = s->prev_c; + pc1 = pcc[0]; + } + s->prev_c = u8c; + + u8c = arabic_shape(u8c, &firstbyte, &u8cc[0], pc, pc1, nc); + } else { + s->prev_c = u8c; + } + schar_from_cc(dest[0], u8c, u8cc); + } + if (cells > 1) { + dest[1][0] = 0; + } +done: + s->p += c_len; + return cells; +} + +static inline void provider_err_virt_text(linenr_T lnum, char *err) +{ + Decoration err_decor = DECORATION_INIT; + int hl_err = syn_check_group(S_LEN("ErrorMsg")); + kv_push(err_decor.virt_text, + ((VirtTextChunk){ .text = err, + .hl_id = hl_err })); + err_decor.virt_text_width = (int)mb_string2cells(err); + decor_add_ephemeral(lnum - 1, 0, lnum - 1, 0, &err_decor, 0, 0); +} + +static void draw_virt_text(win_T *wp, buf_T *buf, int col_off, int *end_col, int max_col, + int win_row) +{ + DecorState *state = &decor_state; + int right_pos = max_col; + bool do_eol = state->eol_col > -1; + for (size_t i = 0; i < kv_size(state->active); i++) { + DecorRange *item = &kv_A(state->active, i); + if (!(item->start_row == state->row + && (kv_size(item->decor.virt_text) || item->decor.ui_watched))) { + continue; + } + if (item->win_col == -1) { + if (item->decor.virt_text_pos == kVTRightAlign) { + right_pos -= item->decor.virt_text_width; + item->win_col = right_pos; + } else if (item->decor.virt_text_pos == kVTEndOfLine && do_eol) { + item->win_col = state->eol_col; + } else if (item->decor.virt_text_pos == kVTWinCol) { + item->win_col = MAX(item->decor.col + col_off, 0); + } + } + if (item->win_col < 0) { + continue; + } + int col; + if (item->decor.ui_watched) { + // send mark position to UI + col = item->win_col; + WinExtmark m = { (NS)item->ns_id, item->mark_id, win_row, col }; + kv_push(win_extmark_arr, m); + } + if (kv_size(item->decor.virt_text)) { + col = draw_virt_text_item(buf, item->win_col, item->decor.virt_text, + item->decor.hl_mode, max_col, item->win_col - col_off); + } + item->win_col = -2; // deactivate + if (item->decor.virt_text_pos == kVTEndOfLine && do_eol) { + state->eol_col = col + 1; + } + + *end_col = MAX(*end_col, col); + } +} + +static int draw_virt_text_item(buf_T *buf, int col, VirtText vt, HlMode hl_mode, int max_col, + int vcol) +{ + LineState s = LINE_STATE(""); + int virt_attr = 0; + size_t virt_pos = 0; + + while (col < max_col) { + if (!*s.p) { + if (virt_pos >= kv_size(vt)) { + break; + } + virt_attr = 0; + do { + s.p = kv_A(vt, virt_pos).text; + int hl_id = kv_A(vt, virt_pos).hl_id; + virt_attr = hl_combine_attr(virt_attr, + hl_id > 0 ? syn_id2attr(hl_id) : 0); + virt_pos++; + } while (!s.p && virt_pos < kv_size(vt)); + if (!s.p) { + break; + } + } + if (!*s.p) { + continue; + } + int attr; + bool through = false; + if (hl_mode == kHlModeCombine) { + attr = hl_combine_attr(linebuf_attr[col], virt_attr); + } else if (hl_mode == kHlModeBlend) { + through = (*s.p == ' '); + attr = hl_blend_attrs(linebuf_attr[col], virt_attr, &through); + } else { + attr = virt_attr; + } + schar_T dummy[2]; + int cells = line_putchar(buf, &s, through ? dummy : &linebuf_char[col], + max_col - col, false, vcol); + // if we failed to emit a char, we still need to advance + cells = MAX(cells, 1); + + for (int c = 0; c < cells; c++) { + linebuf_attr[col++] = attr; + } + vcol += cells; + } + return col; +} + +/// Return true if CursorLineSign highlight is to be used. +static bool use_cursor_line_sign(win_T *wp, linenr_T lnum) +{ + return wp->w_p_cul + && lnum == wp->w_cursor.lnum + && (wp->w_p_culopt_flags & CULOPT_NBR); +} + +// Get information needed to display the sign in line 'lnum' in window 'wp'. +// If 'nrcol' is TRUE, the sign is going to be displayed in the number column. +// Otherwise the sign is going to be displayed in the sign column. +// +// @param count max number of signs +// @param[out] n_extrap number of characters from pp_extra to display +// @param sign_idxp Index of the displayed sign +static void get_sign_display_info(bool nrcol, win_T *wp, linenr_T lnum, SignTextAttrs sattrs[], + int row, int startrow, int filler_lines, int filler_todo, + int *c_extrap, int *c_finalp, char_u *extra, size_t extra_size, + char_u **pp_extra, int *n_extrap, int *char_attrp, int sign_idx, + int cul_attr) +{ + // Draw cells with the sign value or blank. + *c_extrap = ' '; + *c_finalp = NUL; + if (nrcol) { + *n_extrap = number_width(wp) + 1; + } else { + if (use_cursor_line_sign(wp, lnum)) { + *char_attrp = win_hl_attr(wp, HLF_CLS); + } else { + *char_attrp = win_hl_attr(wp, HLF_SC); + } + *n_extrap = win_signcol_width(wp); + } + + if (row == startrow + filler_lines && filler_todo <= 0) { + SignTextAttrs *sattr = sign_get_attr(sign_idx, sattrs, wp->w_scwidth); + if (sattr != NULL) { + *pp_extra = sattr->text; + if (*pp_extra != NULL) { + *c_extrap = NUL; + *c_finalp = NUL; + + if (nrcol) { + int n, width = number_width(wp) - 2; + for (n = 0; n < width; n++) { + extra[n] = ' '; + } + extra[n] = NUL; + STRCAT(extra, *pp_extra); + STRCAT(extra, " "); + *pp_extra = extra; + *n_extrap = (int)STRLEN(*pp_extra); + } else { + size_t symbol_blen = STRLEN(*pp_extra); + + // TODO(oni-link): Is sign text already extended to + // full cell width? + assert((size_t)win_signcol_width(wp) >= mb_string2cells((char *)(*pp_extra))); + // symbol(s) bytes + (filling spaces) (one byte each) + *n_extrap = (int)symbol_blen + win_signcol_width(wp) - + (int)mb_string2cells((char *)(*pp_extra)); + + assert(extra_size > symbol_blen); + memset(extra, ' ', extra_size); + memcpy(extra, *pp_extra, symbol_blen); + + *pp_extra = extra; + (*pp_extra)[*n_extrap] = NUL; + } + } + + if (use_cursor_line_sign(wp, lnum) && cul_attr > 0) { + *char_attrp = cul_attr; + } else { + *char_attrp = sattr->hl_attr_id; + } + } + } +} + +static int get_sign_attrs(buf_T *buf, linenr_T lnum, SignTextAttrs *sattrs, int *line_attr, + int *num_attr, int *cul_attr) +{ + HlPriAttr line_attrs = { *line_attr, 0 }; + HlPriAttr num_attrs = { *num_attr, 0 }; + HlPriAttr cul_attrs = { *cul_attr, 0 }; + + // TODO(bfredl, vigoux): line_attr should not take priority over decoration! + int num_signs = buf_get_signattrs(buf, lnum, sattrs, &num_attrs, &line_attrs, &cul_attrs); + decor_redraw_signs(buf, lnum - 1, &num_signs, sattrs, &num_attrs, &line_attrs, &cul_attrs); + + *line_attr = line_attrs.attr_id; + *num_attr = num_attrs.attr_id; + *cul_attr = cul_attrs.attr_id; + + return num_signs; +} + +/// Return true if CursorLineNr highlight is to be used for the number column. +/// +/// - 'cursorline' must be set +/// - lnum must be the cursor line +/// - 'cursorlineopt' has "number" +/// - don't highlight filler lines (when in diff mode) +/// - When line is wrapped and 'cursorlineopt' does not have "line", only highlight the line number +/// itself on the first screenline of the wrapped line, otherwise highlight the number column of +/// all screenlines of the wrapped line. +static bool use_cursor_line_nr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines) +{ + return wp->w_p_cul + && lnum == wp->w_cursor.lnum + && (wp->w_p_culopt_flags & CULOPT_NBR) + && (row == startrow + filler_lines + || (row > startrow + filler_lines + && (wp->w_p_culopt_flags & CULOPT_LINE))); +} + +static inline void get_line_number_str(win_T *wp, linenr_T lnum, char_u *buf, size_t buf_len) +{ + long num; + char *fmt = "%*ld "; + + if (wp->w_p_nu && !wp->w_p_rnu) { + // 'number' + 'norelativenumber' + num = (long)lnum; + } else { + // 'relativenumber', don't use negative numbers + num = labs((long)get_cursor_rel_lnum(wp, lnum)); + if (num == 0 && wp->w_p_nu && wp->w_p_rnu) { + // 'number' + 'relativenumber' + num = lnum; + fmt = "%-*ld "; + } + } + + snprintf((char *)buf, buf_len, fmt, number_width(wp), num); +} + +static int get_line_number_attr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines) +{ + if (wp->w_p_rnu) { + if (lnum < wp->w_cursor.lnum) { + // Use LineNrAbove + return win_hl_attr(wp, HLF_LNA); + } + if (lnum > wp->w_cursor.lnum) { + // Use LineNrBelow + return win_hl_attr(wp, HLF_LNB); + } + } + + if (use_cursor_line_nr(wp, lnum, row, startrow, filler_lines)) { + // TODO(vim): Can we use CursorLine instead of CursorLineNr + // when CursorLineNr isn't set? + return win_hl_attr(wp, HLF_CLN); + } + + return win_hl_attr(wp, HLF_N); +} + +static void apply_cursorline_highlight(win_T *wp, linenr_T lnum, int *line_attr, int *cul_attr, + int *line_attr_lowprio) +{ + *cul_attr = win_hl_attr(wp, HLF_CUL); + HlAttrs ae = syn_attr2entry(*cul_attr); + // We make a compromise here (#7383): + // * low-priority CursorLine if fg is not set + // * high-priority ("same as Vim" priority) CursorLine if fg is set + if (ae.rgb_fg_color == -1 && ae.cterm_fg_color == 0) { + *line_attr_lowprio = *cul_attr; + } else { + if (!(State & MODE_INSERT) && bt_quickfix(wp->w_buffer) + && qf_current_entry(wp) == lnum) { + *line_attr = hl_combine_attr(*cul_attr, *line_attr); + } else { + *line_attr = *cul_attr; + } + } +} + +/// Display line "lnum" of window 'wp' on the screen. +/// wp->w_virtcol needs to be valid. +/// +/// @param lnum line to display +/// @param startrow first row relative to window grid +/// @param endrow last grid row to be redrawn +/// @param nochange not updating for changed text +/// @param number_only only update the number column +/// @param foldinfo fold info for this line +/// @param[in, out] providers decoration providers active this line +/// items will be disables if they cause errors +/// or explicitly return `false`. +/// +/// @return the number of last row the line occupies. +int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange, bool number_only, + foldinfo_T foldinfo, DecorProviders *providers, char **provider_err) +{ + int c = 0; // init for GCC + long vcol = 0; // virtual column (for tabs) + long vcol_sbr = -1; // virtual column after showbreak + long vcol_prev = -1; // "vcol" of previous character + char_u *line; // current line + char_u *ptr; // current position in "line" + int row; // row in the window, excl w_winrow + ScreenGrid *grid = &wp->w_grid; // grid specific to the window + + char_u extra[57]; // sign, line number and 'fdc' must + // fit in here + int n_extra = 0; // number of extra chars + char_u *p_extra = NULL; // string of extra chars, plus NUL + char_u *p_extra_free = NULL; // p_extra needs to be freed + int c_extra = NUL; // extra chars, all the same + int c_final = NUL; // final char, mandatory if set + int extra_attr = 0; // attributes when n_extra != 0 + static char_u *at_end_str = (char_u *)""; // used for p_extra when displaying + // curwin->w_p_lcs_chars.eol at + // end-of-line + int lcs_eol_one = wp->w_p_lcs_chars.eol; // 'eol' until it's been used + int lcs_prec_todo = wp->w_p_lcs_chars.prec; // 'prec' until it's been used + bool has_fold = foldinfo.fi_level != 0 && foldinfo.fi_lines > 0; + + // saved "extra" items for when draw_state becomes WL_LINE (again) + int saved_n_extra = 0; + char_u *saved_p_extra = NULL; + int saved_c_extra = 0; + int saved_c_final = 0; + int saved_char_attr = 0; + + int n_attr = 0; // chars with special attr + int saved_attr2 = 0; // char_attr saved for n_attr + int n_attr3 = 0; // chars with overruling special attr + int saved_attr3 = 0; // char_attr saved for n_attr3 + + int n_skip = 0; // nr of chars to skip for 'nowrap' + + int fromcol = -10; // start of inverting + int tocol = MAXCOL; // end of inverting + int fromcol_prev = -2; // start of inverting after cursor + bool noinvcur = false; // don't invert the cursor + bool lnum_in_visual_area = false; + pos_T pos; + long v; + + int char_attr = 0; // attributes for next character + bool attr_pri = false; // char_attr has priority + bool area_highlighting = false; // Visual or incsearch highlighting in this line + int attr = 0; // attributes for area highlighting + int area_attr = 0; // attributes desired by highlighting + int search_attr = 0; // attributes desired by 'hlsearch' + int vcol_save_attr = 0; // saved attr for 'cursorcolumn' + int syntax_attr = 0; // attributes desired by syntax + bool has_syntax = false; // this buffer has syntax highl. + int save_did_emsg; + int eol_hl_off = 0; // 1 if highlighted char after EOL + bool draw_color_col = false; // highlight colorcolumn + int *color_cols = NULL; // pointer to according columns array + bool has_spell = false; // this buffer has spell checking +#define SPWORDLEN 150 + char_u nextline[SPWORDLEN * 2]; // text with start of the next line + int nextlinecol = 0; // column where nextline[] starts + int nextline_idx = 0; // index in nextline[] where next line + // starts + int spell_attr = 0; // attributes desired by spelling + int word_end = 0; // last byte with same spell_attr + static linenr_T checked_lnum = 0; // line number for "checked_col" + static int checked_col = 0; // column in "checked_lnum" up to which + // there are no spell errors + static int cap_col = -1; // column to check for Cap word + static linenr_T capcol_lnum = 0; // line number where "cap_col" + int cur_checked_col = 0; // checked column for current line + int extra_check = 0; // has syntax or linebreak + int multi_attr = 0; // attributes desired by multibyte + int mb_l = 1; // multi-byte byte length + int mb_c = 0; // decoded multi-byte character + bool mb_utf8 = false; // screen char is UTF-8 char + int u8cc[MAX_MCO]; // composing UTF-8 chars + int filler_lines; // nr of filler lines to be drawn + int filler_todo; // nr of filler lines still to do + 1 + hlf_T diff_hlf = (hlf_T)0; // type of diff highlighting + int change_start = MAXCOL; // first col of changed area + int change_end = -1; // last col of changed area + colnr_T trailcol = MAXCOL; // start of trailing spaces + colnr_T leadcol = 0; // start of leading spaces + bool in_multispace = false; // in multiple consecutive spaces + int multispace_pos = 0; // position in lcs-multispace string + bool need_showbreak = false; // overlong line, skip first x chars + int line_attr = 0; // attribute for the whole line + int line_attr_save; + int line_attr_lowprio = 0; // low-priority attribute for the line + int line_attr_lowprio_save; + int prev_c = 0; // previous Arabic character + int prev_c1 = 0; // first composing char for prev_c + + bool search_attr_from_match = false; // if search_attr is from :match + bool has_decor = false; // this buffer has decoration + int win_col_offset = 0; // offset for window columns + + char_u buf_fold[FOLD_TEXT_LEN]; // Hold value returned by get_foldtext + + bool area_active = false; + + int cul_attr = 0; // set when 'cursorline' active + // 'cursorlineopt' has "screenline" and cursor is in this line + bool cul_screenline = false; + // margin columns for the screen line, needed for when 'cursorlineopt' + // contains "screenline" + int left_curline_col = 0; + int right_curline_col = 0; + + // draw_state: items that are drawn in sequence: +#define WL_START 0 // nothing done yet +#define WL_CMDLINE (WL_START + 1) // cmdline window column +#define WL_FOLD (WL_CMDLINE + 1) // 'foldcolumn' +#define WL_SIGN (WL_FOLD + 1) // column for signs +#define WL_NR (WL_SIGN + 1) // line number +#define WL_BRI (WL_NR + 1) // 'breakindent' +#define WL_SBR (WL_BRI + 1) // 'showbreak' or 'diff' +#define WL_LINE (WL_SBR + 1) // text in the line + int draw_state = WL_START; // what to draw next + + int syntax_flags = 0; + int syntax_seqnr = 0; + int prev_syntax_id = 0; + int conceal_attr = win_hl_attr(wp, HLF_CONCEAL); + bool is_concealing = false; + int boguscols = 0; ///< nonexistent columns added to + ///< force wrapping + int vcol_off = 0; ///< offset for concealed characters + int did_wcol = false; + int match_conc = 0; ///< cchar for match functions + int old_boguscols = 0; +#define VCOL_HLC (vcol - vcol_off) +#define FIX_FOR_BOGUSCOLS \ + { \ + n_extra += vcol_off; \ + vcol -= vcol_off; \ + vcol_off = 0; \ + col -= boguscols; \ + old_boguscols = boguscols; \ + boguscols = 0; \ + } + + if (startrow > endrow) { // past the end already! + return startrow; + } + + row = startrow; + + buf_T *buf = wp->w_buffer; + bool end_fill = (lnum == buf->b_ml.ml_line_count + 1); + + if (!number_only) { + // To speed up the loop below, set extra_check when there is linebreak, + // trailing white space and/or syntax processing to be done. + extra_check = wp->w_p_lbr; + if (syntax_present(wp) && !wp->w_s->b_syn_error && !wp->w_s->b_syn_slow + && !has_fold && !end_fill) { + // Prepare for syntax highlighting in this line. When there is an + // error, stop syntax highlighting. + save_did_emsg = did_emsg; + did_emsg = false; + syntax_start(wp, lnum); + if (did_emsg) { + wp->w_s->b_syn_error = true; + } else { + did_emsg = save_did_emsg; + if (!wp->w_s->b_syn_slow) { + has_syntax = true; + extra_check = true; + } + } + } + + has_decor = decor_redraw_line(buf, lnum - 1, &decor_state); + + providers_invoke_line(wp, providers, lnum - 1, &has_decor, provider_err); + + if (*provider_err) { + provider_err_virt_text(lnum, *provider_err); + has_decor = true; + *provider_err = NULL; + } + + if (has_decor) { + extra_check = true; + } + + // Check for columns to display for 'colorcolumn'. + color_cols = wp->w_buffer->terminal ? NULL : wp->w_p_cc_cols; + if (color_cols != NULL) { + draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols); + } + + if (wp->w_p_spell + && !has_fold + && !end_fill + && *wp->w_s->b_p_spl != NUL + && !GA_EMPTY(&wp->w_s->b_langp) + && *(char **)(wp->w_s->b_langp.ga_data) != NULL) { + // Prepare for spell checking. + has_spell = true; + extra_check = true; + + // Get the start of the next line, so that words that wrap to the next + // line are found too: "et<line-break>al.". + // Trick: skip a few chars for C/shell/Vim comments + nextline[SPWORDLEN] = NUL; + if (lnum < wp->w_buffer->b_ml.ml_line_count) { + line = ml_get_buf(wp->w_buffer, lnum + 1, false); + spell_cat_line(nextline + SPWORDLEN, line, SPWORDLEN); + } + + // When a word wrapped from the previous line the start of the current + // line is valid. + if (lnum == checked_lnum) { + cur_checked_col = checked_col; + } + checked_lnum = 0; + + // When there was a sentence end in the previous line may require a + // word starting with capital in this line. In line 1 always check + // the first word. + if (lnum != capcol_lnum) { + cap_col = -1; + } + if (lnum == 1) { + cap_col = 0; + } + capcol_lnum = 0; + } + + // handle Visual active in this window + if (VIsual_active && wp->w_buffer == curwin->w_buffer) { + pos_T *top, *bot; + + if (ltoreq(curwin->w_cursor, VIsual)) { + // Visual is after curwin->w_cursor + top = &curwin->w_cursor; + bot = &VIsual; + } else { + // Visual is before curwin->w_cursor + top = &VIsual; + bot = &curwin->w_cursor; + } + lnum_in_visual_area = (lnum >= top->lnum && lnum <= bot->lnum); + if (VIsual_mode == Ctrl_V) { + // block mode + if (lnum_in_visual_area) { + fromcol = wp->w_old_cursor_fcol; + tocol = wp->w_old_cursor_lcol; + } + } else { + // non-block mode + if (lnum > top->lnum && lnum <= bot->lnum) { + fromcol = 0; + } else if (lnum == top->lnum) { + if (VIsual_mode == 'V') { // linewise + fromcol = 0; + } else { + getvvcol(wp, top, (colnr_T *)&fromcol, NULL, NULL); + if (gchar_pos(top) == NUL) { + tocol = fromcol + 1; + } + } + } + if (VIsual_mode != 'V' && lnum == bot->lnum) { + if (*p_sel == 'e' && bot->col == 0 + && bot->coladd == 0) { + fromcol = -10; + tocol = MAXCOL; + } else if (bot->col == MAXCOL) { + tocol = MAXCOL; + } else { + pos = *bot; + if (*p_sel == 'e') { + getvvcol(wp, &pos, (colnr_T *)&tocol, NULL, NULL); + } else { + getvvcol(wp, &pos, NULL, NULL, (colnr_T *)&tocol); + tocol++; + } + } + } + } + + // Check if the char under the cursor should be inverted (highlighted). + if (!highlight_match && lnum == curwin->w_cursor.lnum && wp == curwin + && cursor_is_block_during_visual(*p_sel == 'e')) { + noinvcur = true; + } + + // if inverting in this line set area_highlighting + if (fromcol >= 0) { + area_highlighting = true; + attr = win_hl_attr(wp, HLF_V); + } + // handle 'incsearch' and ":s///c" highlighting + } else if (highlight_match + && wp == curwin + && !has_fold + && lnum >= curwin->w_cursor.lnum + && lnum <= curwin->w_cursor.lnum + search_match_lines) { + if (lnum == curwin->w_cursor.lnum) { + getvcol(curwin, &(curwin->w_cursor), + (colnr_T *)&fromcol, NULL, NULL); + } else { + fromcol = 0; + } + if (lnum == curwin->w_cursor.lnum + search_match_lines) { + pos.lnum = lnum; + pos.col = search_match_endcol; + getvcol(curwin, &pos, (colnr_T *)&tocol, NULL, NULL); + } + // do at least one character; happens when past end of line + if (fromcol == tocol && search_match_endcol) { + tocol = fromcol + 1; + } + area_highlighting = true; + attr = win_hl_attr(wp, HLF_I); + } + } + + int bg_attr = win_bg_attr(wp); + + filler_lines = diff_check(wp, lnum); + if (filler_lines < 0) { + if (filler_lines == -1) { + if (diff_find_change(wp, lnum, &change_start, &change_end)) { + diff_hlf = HLF_ADD; // added line + } else if (change_start == 0) { + diff_hlf = HLF_TXD; // changed text + } else { + diff_hlf = HLF_CHD; // changed line + } + } else { + diff_hlf = HLF_ADD; // added line + } + filler_lines = 0; + area_highlighting = true; + } + VirtLines virt_lines = KV_INITIAL_VALUE; + int n_virt_lines = decor_virt_lines(wp, lnum, &virt_lines); + filler_lines += n_virt_lines; + if (lnum == wp->w_topline) { + filler_lines = wp->w_topfill; + n_virt_lines = MIN(n_virt_lines, filler_lines); + } + filler_todo = filler_lines; + + // Cursor line highlighting for 'cursorline' in the current window. + if (lnum == wp->w_cursor.lnum) { + // Do not show the cursor line in the text when Visual mode is active, + // because it's not clear what is selected then. + if (wp->w_p_cul && !(wp == curwin && VIsual_active) + && wp->w_p_culopt_flags != CULOPT_NBR) { + cul_screenline = (wp->w_p_wrap + && (wp->w_p_culopt_flags & CULOPT_SCRLINE)); + if (!cul_screenline) { + apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio); + } else { + margin_columns_win(wp, &left_curline_col, &right_curline_col); + } + area_highlighting = true; + } + } + + SignTextAttrs sattrs[SIGN_SHOW_MAX]; // sign attributes for the sign column + int sign_num_attr = 0; // sign attribute for the number column + int sign_cul_attr = 0; // sign attribute for cursorline + CLEAR_FIELD(sattrs); + int num_signs = get_sign_attrs(buf, lnum, sattrs, &line_attr, &sign_num_attr, &sign_cul_attr); + + // Highlight the current line in the quickfix window. + if (bt_quickfix(wp->w_buffer) && qf_current_entry(wp) == lnum) { + line_attr = win_hl_attr(wp, HLF_QFL); + } + + if (line_attr_lowprio || line_attr) { + area_highlighting = true; + } + + if (cul_screenline) { + line_attr_save = line_attr; + line_attr_lowprio_save = line_attr_lowprio; + } + + line = end_fill ? (char_u *)"" : ml_get_buf(wp->w_buffer, lnum, false); + ptr = line; + + if (has_spell && !number_only) { + // For checking first word with a capital skip white space. + if (cap_col == 0) { + cap_col = (int)getwhitecols(line); + } + + // To be able to spell-check over line boundaries copy the end of the + // current line into nextline[]. Above the start of the next line was + // copied to nextline[SPWORDLEN]. + if (nextline[SPWORDLEN] == NUL) { + // No next line or it is empty. + nextlinecol = MAXCOL; + nextline_idx = 0; + } else { + v = (long)STRLEN(line); + if (v < SPWORDLEN) { + // Short line, use it completely and append the start of the + // next line. + nextlinecol = 0; + memmove(nextline, line, (size_t)v); + STRMOVE(nextline + v, nextline + SPWORDLEN); + nextline_idx = (int)v + 1; + } else { + // Long line, use only the last SPWORDLEN bytes. + nextlinecol = (int)v - SPWORDLEN; + memmove(nextline, line + nextlinecol, SPWORDLEN); // -V512 + nextline_idx = SPWORDLEN + 1; + } + } + } + + if (wp->w_p_list && !has_fold && !end_fill) { + if (wp->w_p_lcs_chars.space + || wp->w_p_lcs_chars.multispace != NULL + || wp->w_p_lcs_chars.leadmultispace != NULL + || wp->w_p_lcs_chars.trail + || wp->w_p_lcs_chars.lead + || wp->w_p_lcs_chars.nbsp) { + extra_check = true; + } + // find start of trailing whitespace + if (wp->w_p_lcs_chars.trail) { + trailcol = (colnr_T)STRLEN(ptr); + while (trailcol > (colnr_T)0 && ascii_iswhite(ptr[trailcol - 1])) { + trailcol--; + } + trailcol += (colnr_T)(ptr - line); + } + // find end of leading whitespace + if (wp->w_p_lcs_chars.lead || wp->w_p_lcs_chars.leadmultispace != NULL) { + leadcol = 0; + while (ascii_iswhite(ptr[leadcol])) { + leadcol++; + } + if (ptr[leadcol] == NUL) { + // in a line full of spaces all of them are treated as trailing + leadcol = (colnr_T)0; + } else { + // keep track of the first column not filled with spaces + leadcol += (colnr_T)(ptr - line) + 1; + } + } + } + + // 'nowrap' or 'wrap' and a single line that doesn't fit: Advance to the + // first character to be displayed. + if (wp->w_p_wrap) { + v = wp->w_skipcol; + } else { + v = wp->w_leftcol; + } + if (v > 0 && !number_only) { + char_u *prev_ptr = ptr; + while (vcol < v && *ptr != NUL) { + c = win_lbr_chartabsize(wp, line, ptr, (colnr_T)vcol, NULL); + vcol += c; + prev_ptr = ptr; + MB_PTR_ADV(ptr); + } + + // When: + // - 'cuc' is set, or + // - 'colorcolumn' is set, or + // - 'virtualedit' is set, or + // - the visual mode is active, + // the end of the line may be before the start of the displayed part. + if (vcol < v && (wp->w_p_cuc + || draw_color_col + || virtual_active() + || (VIsual_active && wp->w_buffer == curwin->w_buffer))) { + vcol = v; + } + + // Handle a character that's not completely on the screen: Put ptr at + // that character but skip the first few screen characters. + if (vcol > v) { + vcol -= c; + ptr = prev_ptr; + // If the character fits on the screen, don't need to skip it. + // Except for a TAB. + if (utf_ptr2cells((char *)ptr) >= c || *ptr == TAB) { + n_skip = (int)(v - vcol); + } + } + + // Adjust for when the inverted text is before the screen, + // and when the start of the inverted text is before the screen. + if (tocol <= vcol) { + fromcol = 0; + } else if (fromcol >= 0 && fromcol < vcol) { + fromcol = (int)vcol; + } + + // When w_skipcol is non-zero, first line needs 'showbreak' + if (wp->w_p_wrap) { + need_showbreak = true; + } + // When spell checking a word we need to figure out the start of the + // word and if it's badly spelled or not. + if (has_spell) { + size_t len; + colnr_T linecol = (colnr_T)(ptr - line); + hlf_T spell_hlf = HLF_COUNT; + + pos = wp->w_cursor; + wp->w_cursor.lnum = lnum; + wp->w_cursor.col = linecol; + len = spell_move_to(wp, FORWARD, true, true, &spell_hlf); + + // spell_move_to() may call ml_get() and make "line" invalid + line = ml_get_buf(wp->w_buffer, lnum, false); + ptr = line + linecol; + + if (len == 0 || (int)wp->w_cursor.col > ptr - line) { + // no bad word found at line start, don't check until end of a + // word + spell_hlf = HLF_COUNT; + word_end = (int)(spell_to_word_end(ptr, wp) - line + 1); + } else { + // bad word found, use attributes until end of word + assert(len <= INT_MAX); + word_end = wp->w_cursor.col + (int)len + 1; + + // Turn index into actual attributes. + if (spell_hlf != HLF_COUNT) { + spell_attr = highlight_attr[spell_hlf]; + } + } + wp->w_cursor = pos; + + // Need to restart syntax highlighting for this line. + if (has_syntax) { + syntax_start(wp, lnum); + } + } + } + + // Correct highlighting for cursor that can't be disabled. + // Avoids having to check this for each character. + if (fromcol >= 0) { + if (noinvcur) { + if ((colnr_T)fromcol == wp->w_virtcol) { + // highlighting starts at cursor, let it start just after the + // cursor + fromcol_prev = fromcol; + fromcol = -1; + } else if ((colnr_T)fromcol < wp->w_virtcol) { + // restart highlighting after the cursor + fromcol_prev = wp->w_virtcol; + } + } + if (fromcol >= tocol) { + fromcol = -1; + } + } + + if (!number_only && !has_fold && !end_fill) { + v = ptr - line; + area_highlighting |= prepare_search_hl_line(wp, lnum, (colnr_T)v, + &line, &screen_search_hl, &search_attr, + &search_attr_from_match); + ptr = line + v; // "line" may have been updated + } + + int off = 0; // Offset relative start of line + int col = 0; // Visual column on screen. + if (wp->w_p_rl) { + // Rightleft window: process the text in the normal direction, but put + // it in linebuf_char[off] from right to left. Start at the + // rightmost column of the window. + col = grid->cols - 1; + off += col; + } + + // won't highlight after TERM_ATTRS_MAX columns + int term_attrs[TERM_ATTRS_MAX] = { 0 }; + if (wp->w_buffer->terminal) { + terminal_get_line_attributes(wp->w_buffer->terminal, wp, lnum, term_attrs); + extra_check = true; + } + + int sign_idx = 0; + // Repeat for the whole displayed line. + for (;;) { + int has_match_conc = 0; ///< match wants to conceal + int decor_conceal = 0; + + bool did_decrement_ptr = false; + + // Skip this quickly when working on the text. + if (draw_state != WL_LINE) { + if (cul_screenline) { + cul_attr = 0; + line_attr = line_attr_save; + line_attr_lowprio = line_attr_lowprio_save; + } + + if (draw_state == WL_CMDLINE - 1 && n_extra == 0) { + draw_state = WL_CMDLINE; + if (cmdwin_type != 0 && wp == curwin) { + // Draw the cmdline character. + n_extra = 1; + c_extra = cmdwin_type; + c_final = NUL; + char_attr = win_hl_attr(wp, HLF_AT); + } + } + + if (draw_state == WL_FOLD - 1 && n_extra == 0) { + int fdc = compute_foldcolumn(wp, 0); + + draw_state = WL_FOLD; + if (fdc > 0) { + // Draw the 'foldcolumn'. Allocate a buffer, "extra" may + // already be in use. + xfree(p_extra_free); + p_extra_free = xmalloc(MAX_MCO * (size_t)fdc + 1); + n_extra = (int)fill_foldcolumn(p_extra_free, wp, foldinfo, lnum); + p_extra_free[n_extra] = NUL; + p_extra = p_extra_free; + c_extra = NUL; + c_final = NUL; + if (use_cursor_line_sign(wp, lnum)) { + char_attr = win_hl_attr(wp, HLF_CLF); + } else { + char_attr = win_hl_attr(wp, HLF_FC); + } + } + } + + // sign column, this is hit until sign_idx reaches count + if (draw_state == WL_SIGN - 1 && n_extra == 0) { + draw_state = WL_SIGN; + // Show the sign column when there are any signs in this buffer + if (wp->w_scwidth > 0) { + get_sign_display_info(false, wp, lnum, sattrs, row, + startrow, filler_lines, filler_todo, + &c_extra, &c_final, extra, sizeof(extra), + &p_extra, &n_extra, &char_attr, sign_idx, + sign_cul_attr); + sign_idx++; + if (sign_idx < wp->w_scwidth) { + draw_state = WL_SIGN - 1; + } else { + sign_idx = 0; + } + } + } + + if (draw_state == WL_NR - 1 && n_extra == 0) { + draw_state = WL_NR; + // Display the absolute or relative line number. After the + // first fill with blanks when the 'n' flag isn't in 'cpo' + if ((wp->w_p_nu || wp->w_p_rnu) + && (row == startrow + filler_lines + || vim_strchr(p_cpo, CPO_NUMCOL) == NULL)) { + // If 'signcolumn' is set to 'number' and a sign is present + // in 'lnum', then display the sign instead of the line + // number. + if (*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u' && num_signs > 0) { + get_sign_display_info(true, wp, lnum, sattrs, row, + startrow, filler_lines, filler_todo, + &c_extra, &c_final, extra, sizeof(extra), + &p_extra, &n_extra, &char_attr, sign_idx, + sign_cul_attr); + } else { + // Draw the line number (empty space after wrapping). + if (row == startrow + filler_lines) { + get_line_number_str(wp, lnum, (char_u *)extra, sizeof(extra)); + if (wp->w_skipcol > 0) { + for (p_extra = extra; *p_extra == ' '; p_extra++) { + *p_extra = '-'; + } + } + if (wp->w_p_rl) { // reverse line numbers + // like rl_mirror(), but keep the space at the end + char_u *p2 = (char_u *)skipwhite((char *)extra); + p2 = skiptowhite(p2) - 1; + for (char_u *p1 = (char_u *)skipwhite((char *)extra); p1 < p2; p1++, p2--) { + const char_u t = *p1; + *p1 = *p2; + *p2 = t; + } + } + p_extra = extra; + c_extra = NUL; + } else { + c_extra = ' '; + } + c_final = NUL; + n_extra = number_width(wp) + 1; + if (sign_num_attr > 0) { + char_attr = sign_num_attr; + } else { + char_attr = get_line_number_attr(wp, lnum, row, startrow, filler_lines); + } + } + } + } + + if (draw_state == WL_NR && n_extra == 0) { + win_col_offset = off; + } + + if (wp->w_briopt_sbr && draw_state == WL_BRI - 1 + && n_extra == 0 && *get_showbreak_value(wp) != NUL) { + // draw indent after showbreak value + draw_state = WL_BRI; + } else if (wp->w_briopt_sbr && draw_state == WL_SBR && n_extra == 0) { + // after the showbreak, draw the breakindent + draw_state = WL_BRI - 1; + } + + // draw 'breakindent': indent wrapped text accordingly + if (draw_state == WL_BRI - 1 && n_extra == 0) { + draw_state = WL_BRI; + // if need_showbreak is set, breakindent also applies + if (wp->w_p_bri && (row != startrow || need_showbreak) + && filler_lines == 0) { + char_attr = 0; + + if (diff_hlf != (hlf_T)0) { + char_attr = win_hl_attr(wp, (int)diff_hlf); + } + p_extra = NULL; + c_extra = ' '; + c_final = NUL; + n_extra = + get_breakindent_win(wp, ml_get_buf(wp->w_buffer, lnum, false)); + if (row == startrow) { + n_extra -= win_col_off2(wp); + if (n_extra < 0) { + n_extra = 0; + } + } + if (wp->w_skipcol > 0 && wp->w_p_wrap && wp->w_briopt_sbr) { + need_showbreak = false; + } + // Correct end of highlighted area for 'breakindent', + // required wen 'linebreak' is also set. + if (tocol == vcol) { + tocol += n_extra; + } + } + } + + if (draw_state == WL_SBR - 1 && n_extra == 0) { + draw_state = WL_SBR; + if (filler_todo > filler_lines - n_virt_lines) { + // TODO(bfredl): check this doesn't inhibit TUI-style + // clear-to-end-of-line. + c_extra = ' '; + c_final = NUL; + if (wp->w_p_rl) { + n_extra = col + 1; + } else { + n_extra = grid->cols - col; + } + char_attr = 0; + } else if (filler_todo > 0) { + // draw "deleted" diff line(s) + if (char2cells(wp->w_p_fcs_chars.diff) > 1) { + c_extra = '-'; + c_final = NUL; + } else { + c_extra = wp->w_p_fcs_chars.diff; + c_final = NUL; + } + if (wp->w_p_rl) { + n_extra = col + 1; + } else { + n_extra = grid->cols - col; + } + char_attr = win_hl_attr(wp, HLF_DED); + } + char_u *const sbr = get_showbreak_value(wp); + if (*sbr != NUL && need_showbreak) { + // Draw 'showbreak' at the start of each broken line. + p_extra = sbr; + c_extra = NUL; + c_final = NUL; + n_extra = (int)STRLEN(sbr); + char_attr = win_hl_attr(wp, HLF_AT); + if (wp->w_skipcol == 0 || !wp->w_p_wrap) { + need_showbreak = false; + } + vcol_sbr = vcol + mb_charlen(sbr); + // Correct end of highlighted area for 'showbreak', + // required when 'linebreak' is also set. + if (tocol == vcol) { + tocol += n_extra; + } + // Combine 'showbreak' with 'cursorline', prioritizing 'showbreak'. + if (cul_attr) { + char_attr = hl_combine_attr(cul_attr, char_attr); + } + } + } + + if (draw_state == WL_LINE - 1 && n_extra == 0) { + sign_idx = 0; + draw_state = WL_LINE; + + if (has_decor && row == startrow + filler_lines) { + // hide virt_text on text hidden by 'nowrap' + decor_redraw_col(wp->w_buffer, (int)vcol, off, true, &decor_state); + } + + if (saved_n_extra) { + // Continue item from end of wrapped line. + n_extra = saved_n_extra; + c_extra = saved_c_extra; + c_final = saved_c_final; + p_extra = saved_p_extra; + char_attr = saved_char_attr; + } else { + char_attr = 0; + } + } + } + + if (cul_screenline && draw_state == WL_LINE + && vcol >= left_curline_col + && vcol < right_curline_col) { + apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio); + } + + // When still displaying '$' of change command, stop at cursor + if (((dollar_vcol >= 0 + && wp == curwin + && lnum == wp->w_cursor.lnum + && vcol >= (long)wp->w_virtcol) + || (number_only && draw_state > WL_NR)) + && filler_todo <= 0) { + draw_virt_text(wp, buf, win_col_offset, &col, grid->cols, row); + grid_put_linebuf(grid, row, 0, col, -grid->cols, wp->w_p_rl, wp, bg_attr, false); + // Pretend we have finished updating the window. Except when + // 'cursorcolumn' is set. + if (wp->w_p_cuc) { + row = wp->w_cline_row + wp->w_cline_height; + } else { + row = grid->rows; + } + break; + } + + if (draw_state == WL_LINE + && has_fold + && col == win_col_offset + && n_extra == 0 + && row == startrow) { + char_attr = win_hl_attr(wp, HLF_FL); + + linenr_T lnume = lnum + foldinfo.fi_lines - 1; + memset(buf_fold, ' ', FOLD_TEXT_LEN); + p_extra = get_foldtext(wp, lnum, lnume, foldinfo, buf_fold); + n_extra = (int)STRLEN(p_extra); + + if (p_extra != buf_fold) { + xfree(p_extra_free); + p_extra_free = p_extra; + } + c_extra = NUL; + c_final = NUL; + p_extra[n_extra] = NUL; + } + + if (draw_state == WL_LINE + && has_fold + && col < grid->cols + && n_extra == 0 + && row == startrow) { + // fill rest of line with 'fold' + c_extra = wp->w_p_fcs_chars.fold; + c_final = NUL; + + n_extra = wp->w_p_rl ? (col + 1) : (grid->cols - col); + } + + if (draw_state == WL_LINE + && has_fold + && col >= grid->cols + && n_extra != 0 + && row == startrow) { + // Truncate the folding. + n_extra = 0; + } + + if (draw_state == WL_LINE && (area_highlighting || has_spell)) { + // handle Visual or match highlighting in this line + if (vcol == fromcol + || (vcol + 1 == fromcol && n_extra == 0 + && utf_ptr2cells((char *)ptr) > 1) + || ((int)vcol_prev == fromcol_prev + && vcol_prev < vcol // not at margin + && vcol < tocol)) { + area_attr = attr; // start highlighting + if (area_highlighting) { + area_active = true; + } + } else if (area_attr != 0 && (vcol == tocol + || (noinvcur + && (colnr_T)vcol == wp->w_virtcol))) { + area_attr = 0; // stop highlighting + area_active = false; + } + + if (!n_extra) { + // Check for start/end of 'hlsearch' and other matches. + // After end, check for start/end of next match. + // When another match, have to check for start again. + v = (ptr - line); + search_attr = update_search_hl(wp, lnum, (colnr_T)v, &line, &screen_search_hl, + &has_match_conc, + &match_conc, lcs_eol_one, &search_attr_from_match); + ptr = line + v; // "line" may have been changed + + // Do not allow a conceal over EOL otherwise EOL will be missed + // and bad things happen. + if (*ptr == NUL) { + has_match_conc = 0; + } + } + + if (diff_hlf != (hlf_T)0) { + if (diff_hlf == HLF_CHD && ptr - line >= change_start + && n_extra == 0) { + diff_hlf = HLF_TXD; // changed text + } + if (diff_hlf == HLF_TXD && ptr - line > change_end + && n_extra == 0) { + diff_hlf = HLF_CHD; // changed line + } + line_attr = win_hl_attr(wp, (int)diff_hlf); + // Overlay CursorLine onto diff-mode highlight. + if (cul_attr) { + line_attr = 0 != line_attr_lowprio // Low-priority CursorLine + ? hl_combine_attr(hl_combine_attr(cul_attr, line_attr), + hl_get_underline()) + : hl_combine_attr(line_attr, cul_attr); + } + } + + // Decide which of the highlight attributes to use. + attr_pri = true; + + if (area_attr != 0) { + char_attr = hl_combine_attr(line_attr, area_attr); + if (!highlight_match) { + // let search highlight show in Visual area if possible + char_attr = hl_combine_attr(search_attr, char_attr); + } + } else if (search_attr != 0) { + char_attr = hl_combine_attr(line_attr, search_attr); + } else if (line_attr != 0 && ((fromcol == -10 && tocol == MAXCOL) + || vcol < fromcol || vcol_prev < fromcol_prev + || vcol >= tocol)) { + // Use line_attr when not in the Visual or 'incsearch' area + // (area_attr may be 0 when "noinvcur" is set). + char_attr = line_attr; + } else { + attr_pri = false; + if (has_syntax) { + char_attr = syntax_attr; + } else { + char_attr = 0; + } + } + } + + // Get the next character to put on the screen. + // + // The "p_extra" points to the extra stuff that is inserted to + // represent special characters (non-printable stuff) and other + // things. When all characters are the same, c_extra is used. + // If c_final is set, it will compulsorily be used at the end. + // "p_extra" must end in a NUL to avoid utfc_ptr2len() reads past + // "p_extra[n_extra]". + // For the '$' of the 'list' option, n_extra == 1, p_extra == "". + if (n_extra > 0) { + if (c_extra != NUL || (n_extra == 1 && c_final != NUL)) { + c = (n_extra == 1 && c_final != NUL) ? c_final : c_extra; + mb_c = c; // doesn't handle non-utf-8 multi-byte! + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; + } + } else { + assert(p_extra != NULL); + c = *p_extra; + mb_c = c; + // If the UTF-8 character is more than one byte: + // Decode it into "mb_c". + mb_l = utfc_ptr2len((char *)p_extra); + mb_utf8 = false; + if (mb_l > n_extra) { + mb_l = 1; + } else if (mb_l > 1) { + mb_c = utfc_ptr2char(p_extra, u8cc); + mb_utf8 = true; + c = 0xc0; + } + if (mb_l == 0) { // at the NUL at end-of-line + mb_l = 1; + } + + // If a double-width char doesn't fit display a '>' in the last column. + if ((wp->w_p_rl ? (col <= 0) : (col >= grid->cols - 1)) + && utf_char2cells(mb_c) == 2) { + c = '>'; + mb_c = c; + mb_l = 1; + (void)mb_l; + multi_attr = win_hl_attr(wp, HLF_AT); + + if (cul_attr) { + multi_attr = 0 != line_attr_lowprio + ? hl_combine_attr(cul_attr, multi_attr) + : hl_combine_attr(multi_attr, cul_attr); + } + + // put the pointer back to output the double-width + // character at the start of the next line. + n_extra++; + p_extra--; + } else { + n_extra -= mb_l - 1; + p_extra += mb_l - 1; + } + p_extra++; + } + n_extra--; + } else if (foldinfo.fi_lines > 0) { + // skip writing the buffer line itself + c = NUL; + XFREE_CLEAR(p_extra_free); + } else { + int c0; + + XFREE_CLEAR(p_extra_free); + + // Get a character from the line itself. + c0 = c = *ptr; + mb_c = c; + // If the UTF-8 character is more than one byte: Decode it + // into "mb_c". + mb_l = utfc_ptr2len((char *)ptr); + mb_utf8 = false; + if (mb_l > 1) { + mb_c = utfc_ptr2char(ptr, u8cc); + // Overlong encoded ASCII or ASCII with composing char + // is displayed normally, except a NUL. + if (mb_c < 0x80) { + c0 = c = mb_c; + } + mb_utf8 = true; + + // At start of the line we can have a composing char. + // Draw it as a space with a composing char. + if (utf_iscomposing(mb_c)) { + int i; + + for (i = MAX_MCO - 1; i > 0; i--) { + u8cc[i] = u8cc[i - 1]; + } + u8cc[0] = mb_c; + mb_c = ' '; + } + } + + if ((mb_l == 1 && c >= 0x80) + || (mb_l >= 1 && mb_c == 0) + || (mb_l > 1 && (!vim_isprintc(mb_c)))) { + // Illegal UTF-8 byte: display as <xx>. + // Non-BMP character : display as ? or fullwidth ?. + transchar_hex((char *)extra, mb_c); + if (wp->w_p_rl) { // reverse + rl_mirror(extra); + } + + p_extra = extra; + c = *p_extra; + mb_c = mb_ptr2char_adv((const char_u **)&p_extra); + mb_utf8 = (c >= 0x80); + n_extra = (int)STRLEN(p_extra); + c_extra = NUL; + c_final = NUL; + if (area_attr == 0 && search_attr == 0) { + n_attr = n_extra + 1; + extra_attr = win_hl_attr(wp, HLF_8); + saved_attr2 = char_attr; // save current attr + } + } else if (mb_l == 0) { // at the NUL at end-of-line + mb_l = 1; + } else if (p_arshape && !p_tbidi && ARABIC_CHAR(mb_c)) { + // Do Arabic shaping. + int pc, pc1, nc; + int pcc[MAX_MCO]; + + // The idea of what is the previous and next + // character depends on 'rightleft'. + if (wp->w_p_rl) { + pc = prev_c; + pc1 = prev_c1; + nc = utf_ptr2char((char *)ptr + mb_l); + prev_c1 = u8cc[0]; + } else { + pc = utfc_ptr2char(ptr + mb_l, pcc); + nc = prev_c; + pc1 = pcc[0]; + } + prev_c = mb_c; + + mb_c = arabic_shape(mb_c, &c, &u8cc[0], pc, pc1, nc); + } else { + prev_c = mb_c; + } + // If a double-width char doesn't fit display a '>' in the + // last column; the character is displayed at the start of the + // next line. + if ((wp->w_p_rl ? (col <= 0) : + (col >= grid->cols - 1)) + && utf_char2cells(mb_c) == 2) { + c = '>'; + mb_c = c; + mb_utf8 = false; + mb_l = 1; + multi_attr = win_hl_attr(wp, HLF_AT); + // Put pointer back so that the character will be + // displayed at the start of the next line. + ptr--; + did_decrement_ptr = true; + } else if (*ptr != NUL) { + ptr += mb_l - 1; + } + + // If a double-width char doesn't fit at the left side display a '<' in + // the first column. Don't do this for unprintable characters. + if (n_skip > 0 && mb_l > 1 && n_extra == 0) { + n_extra = 1; + c_extra = MB_FILLER_CHAR; + c_final = NUL; + c = ' '; + if (area_attr == 0 && search_attr == 0) { + n_attr = n_extra + 1; + extra_attr = win_hl_attr(wp, HLF_AT); + saved_attr2 = char_attr; // save current attr + } + mb_c = c; + mb_utf8 = false; + mb_l = 1; + } + ptr++; + + if (extra_check) { + bool can_spell = true; + + // Get syntax attribute, unless still at the start of the line + // (double-wide char that doesn't fit). + v = (ptr - line); + if (has_syntax && v > 0) { + // Get the syntax attribute for the character. If there + // is an error, disable syntax highlighting. + save_did_emsg = did_emsg; + did_emsg = false; + + syntax_attr = get_syntax_attr((colnr_T)v - 1, + has_spell ? &can_spell : NULL, false); + + if (did_emsg) { + wp->w_s->b_syn_error = true; + has_syntax = false; + } else { + did_emsg = save_did_emsg; + } + + if (wp->w_s->b_syn_slow) { + has_syntax = false; + } + + // Need to get the line again, a multi-line regexp may + // have made it invalid. + line = ml_get_buf(wp->w_buffer, lnum, false); + ptr = line + v; + + if (!attr_pri) { + if (cul_attr) { + char_attr = 0 != line_attr_lowprio + ? hl_combine_attr(cul_attr, syntax_attr) + : hl_combine_attr(syntax_attr, cul_attr); + } else { + char_attr = syntax_attr; + } + } else { + char_attr = hl_combine_attr(syntax_attr, char_attr); + } + // no concealing past the end of the line, it interferes + // with line highlighting. + if (c == NUL) { + syntax_flags = 0; + } else { + syntax_flags = get_syntax_info(&syntax_seqnr); + } + } else if (!attr_pri) { + char_attr = 0; + } + + // Check spelling (unless at the end of the line). + // Only do this when there is no syntax highlighting, the + // @Spell cluster is not used or the current syntax item + // contains the @Spell cluster. + v = (ptr - line); + if (has_spell && v >= word_end && v > cur_checked_col) { + spell_attr = 0; + if (!attr_pri) { + char_attr = syntax_attr; + } + if (c != 0 && (!has_syntax || can_spell)) { + char_u *prev_ptr; + char_u *p; + int len; + hlf_T spell_hlf = HLF_COUNT; + prev_ptr = ptr - mb_l; + v -= mb_l - 1; + + // Use nextline[] if possible, it has the start of the + // next line concatenated. + if ((prev_ptr - line) - nextlinecol >= 0) { + p = nextline + ((prev_ptr - line) - nextlinecol); + } else { + p = prev_ptr; + } + cap_col -= (int)(prev_ptr - line); + size_t tmplen = spell_check(wp, p, &spell_hlf, &cap_col, nochange); + assert(tmplen <= INT_MAX); + len = (int)tmplen; + word_end = (int)v + len; + + // In Insert mode only highlight a word that + // doesn't touch the cursor. + if (spell_hlf != HLF_COUNT + && (State & MODE_INSERT) + && wp->w_cursor.lnum == lnum + && wp->w_cursor.col >= + (colnr_T)(prev_ptr - line) + && wp->w_cursor.col < (colnr_T)word_end) { + spell_hlf = HLF_COUNT; + spell_redraw_lnum = lnum; + } + + if (spell_hlf == HLF_COUNT && p != prev_ptr + && (p - nextline) + len > nextline_idx) { + // Remember that the good word continues at the + // start of the next line. + checked_lnum = lnum + 1; + checked_col = (int)((p - nextline) + len - nextline_idx); + } + + // Turn index into actual attributes. + if (spell_hlf != HLF_COUNT) { + spell_attr = highlight_attr[spell_hlf]; + } + + if (cap_col > 0) { + if (p != prev_ptr + && (p - nextline) + cap_col >= nextline_idx) { + // Remember that the word in the next line + // must start with a capital. + capcol_lnum = lnum + 1; + cap_col = (int)((p - nextline) + cap_col + - nextline_idx); + } else { + // Compute the actual column. + cap_col += (int)(prev_ptr - line); + } + } + } + } + if (spell_attr != 0) { + if (!attr_pri) { + char_attr = hl_combine_attr(char_attr, spell_attr); + } else { + char_attr = hl_combine_attr(spell_attr, char_attr); + } + } + + if (wp->w_buffer->terminal) { + char_attr = hl_combine_attr(term_attrs[vcol], char_attr); + } + + if (has_decor && v > 0) { + bool selected = (area_active || (area_highlighting && noinvcur + && (colnr_T)vcol == wp->w_virtcol)); + int extmark_attr = decor_redraw_col(wp->w_buffer, (colnr_T)v - 1, off, + selected, &decor_state); + if (extmark_attr != 0) { + if (!attr_pri) { + char_attr = hl_combine_attr(char_attr, extmark_attr); + } else { + char_attr = hl_combine_attr(extmark_attr, char_attr); + } + } + + decor_conceal = decor_state.conceal; + if (decor_conceal && decor_state.conceal_char) { + decor_conceal = 2; // really?? + } + } + + // Found last space before word: check for line break. + if (wp->w_p_lbr && c0 == c && vim_isbreak(c) + && !vim_isbreak((int)(*ptr))) { + int mb_off = utf_head_off(line, ptr - 1); + char_u *p = ptr - (mb_off + 1); + // TODO(neovim): is passing p for start of the line OK? + n_extra = win_lbr_chartabsize(wp, line, p, (colnr_T)vcol, NULL) - 1; + + // We have just drawn the showbreak value, no need to add + // space for it again. + if (vcol == vcol_sbr) { + n_extra -= mb_charlen(get_showbreak_value(wp)); + if (n_extra < 0) { + n_extra = 0; + } + } + + if (c == TAB && n_extra + col > grid->cols) { + n_extra = tabstop_padding((colnr_T)vcol, wp->w_buffer->b_p_ts, + wp->w_buffer->b_p_vts_array) - 1; + } + c_extra = mb_off > 0 ? MB_FILLER_CHAR : ' '; + c_final = NUL; + if (ascii_iswhite(c)) { + if (c == TAB) { + // See "Tab alignment" below. + FIX_FOR_BOGUSCOLS; + } + if (!wp->w_p_list) { + c = ' '; + } + } + } + + in_multispace = c == ' ' && ((ptr > line + 1 && ptr[-2] == ' ') || *ptr == ' '); + if (!in_multispace) { + multispace_pos = 0; + } + + // 'list': Change char 160 to 'nbsp' and space to 'space'. + // But not when the character is followed by a composing + // character (use mb_l to check that). + if (wp->w_p_list + && ((((c == 160 && mb_l == 1) + || (mb_utf8 + && ((mb_c == 160 && mb_l == 2) + || (mb_c == 0x202f && mb_l == 3)))) + && wp->w_p_lcs_chars.nbsp) + || (c == ' ' + && mb_l == 1 + && (wp->w_p_lcs_chars.space + || (in_multispace && wp->w_p_lcs_chars.multispace != NULL)) + && ptr - line >= leadcol + && ptr - line <= trailcol))) { + if (in_multispace && wp->w_p_lcs_chars.multispace != NULL) { + c = wp->w_p_lcs_chars.multispace[multispace_pos++]; + if (wp->w_p_lcs_chars.multispace[multispace_pos] == NUL) { + multispace_pos = 0; + } + } else { + c = (c == ' ') ? wp->w_p_lcs_chars.space : wp->w_p_lcs_chars.nbsp; + } + n_attr = 1; + extra_attr = win_hl_attr(wp, HLF_0); + saved_attr2 = char_attr; // save current attr + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; + } + } + + if (c == ' ' && ((trailcol != MAXCOL && ptr > line + trailcol) + || (leadcol != 0 && ptr < line + leadcol))) { + if (leadcol != 0 && in_multispace && ptr < line + leadcol + && wp->w_p_lcs_chars.leadmultispace != NULL) { + c = wp->w_p_lcs_chars.leadmultispace[multispace_pos++]; + if (wp->w_p_lcs_chars.leadmultispace[multispace_pos] == NUL) { + multispace_pos = 0; + } + } else if (ptr > line + trailcol && wp->w_p_lcs_chars.trail) { + c = wp->w_p_lcs_chars.trail; + } else if (ptr < line + leadcol && wp->w_p_lcs_chars.lead) { + c = wp->w_p_lcs_chars.lead; + } else if (leadcol != 0 && wp->w_p_lcs_chars.space) { + c = wp->w_p_lcs_chars.space; + } + + n_attr = 1; + extra_attr = win_hl_attr(wp, HLF_0); + saved_attr2 = char_attr; // save current attr + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; + } + } + } + + // Handling of non-printable characters. + if (!vim_isprintc(c)) { + // when getting a character from the file, we may have to + // turn it into something else on the way to putting it on the screen. + if (c == TAB && (!wp->w_p_list || wp->w_p_lcs_chars.tab1)) { + int tab_len = 0; + long vcol_adjusted = vcol; // removed showbreak length + char_u *const sbr = get_showbreak_value(wp); + + // Only adjust the tab_len, when at the first column after the + // showbreak value was drawn. + if (*sbr != NUL && vcol == vcol_sbr && wp->w_p_wrap) { + vcol_adjusted = vcol - mb_charlen(sbr); + } + // tab amount depends on current column + tab_len = tabstop_padding((colnr_T)vcol_adjusted, + wp->w_buffer->b_p_ts, + wp->w_buffer->b_p_vts_array) - 1; + + if (!wp->w_p_lbr || !wp->w_p_list) { + n_extra = tab_len; + } else { + char_u *p; + int i; + int saved_nextra = n_extra; + + if (vcol_off > 0) { + // there are characters to conceal + tab_len += vcol_off; + } + // boguscols before FIX_FOR_BOGUSCOLS macro from above. + if (wp->w_p_lcs_chars.tab1 && old_boguscols > 0 + && n_extra > tab_len) { + tab_len += n_extra - tab_len; + } + + // If n_extra > 0, it gives the number of chars + // to use for a tab, else we need to calculate the width + // for a tab. + int len = (tab_len * utf_char2len(wp->w_p_lcs_chars.tab2)); + if (wp->w_p_lcs_chars.tab3) { + len += utf_char2len(wp->w_p_lcs_chars.tab3); + } + if (n_extra > 0) { + len += n_extra - tab_len; + } + c = wp->w_p_lcs_chars.tab1; + p = xmalloc((size_t)len + 1); + memset(p, ' ', (size_t)len); + p[len] = NUL; + xfree(p_extra_free); + p_extra_free = p; + for (i = 0; i < tab_len; i++) { + if (*p == NUL) { + tab_len = i; + break; + } + int lcs = wp->w_p_lcs_chars.tab2; + + // if tab3 is given, use it for the last char + if (wp->w_p_lcs_chars.tab3 && i == tab_len - 1) { + lcs = wp->w_p_lcs_chars.tab3; + } + p += utf_char2bytes(lcs, (char *)p); + n_extra += utf_char2len(lcs) - (saved_nextra > 0 ? 1 : 0); + } + p_extra = p_extra_free; + + // n_extra will be increased by FIX_FOX_BOGUSCOLS + // macro below, so need to adjust for that here + if (vcol_off > 0) { + n_extra -= vcol_off; + } + } + + { + int vc_saved = vcol_off; + + // Tab alignment should be identical regardless of + // 'conceallevel' value. So tab compensates of all + // previous concealed characters, and thus resets + // vcol_off and boguscols accumulated so far in the + // line. Note that the tab can be longer than + // 'tabstop' when there are concealed characters. + FIX_FOR_BOGUSCOLS; + + // Make sure, the highlighting for the tab char will be + // correctly set further below (effectively reverts the + // FIX_FOR_BOGSUCOLS macro). + if (n_extra == tab_len + vc_saved && wp->w_p_list + && wp->w_p_lcs_chars.tab1) { + tab_len += vc_saved; + } + } + + mb_utf8 = false; // don't draw as UTF-8 + if (wp->w_p_list) { + c = (n_extra == 0 && wp->w_p_lcs_chars.tab3) + ? wp->w_p_lcs_chars.tab3 + : wp->w_p_lcs_chars.tab1; + if (wp->w_p_lbr) { + c_extra = NUL; // using p_extra from above + } else { + c_extra = wp->w_p_lcs_chars.tab2; + } + c_final = wp->w_p_lcs_chars.tab3; + n_attr = tab_len + 1; + extra_attr = win_hl_attr(wp, HLF_0); + saved_attr2 = char_attr; // save current attr + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } + } else { + c_final = NUL; + c_extra = ' '; + c = ' '; + } + } else if (c == NUL + && (wp->w_p_list + || ((fromcol >= 0 || fromcol_prev >= 0) + && tocol > vcol + && VIsual_mode != Ctrl_V + && (wp->w_p_rl ? (col >= 0) : (col < grid->cols)) + && !(noinvcur + && lnum == wp->w_cursor.lnum + && (colnr_T)vcol == wp->w_virtcol))) + && lcs_eol_one > 0) { + // Display a '$' after the line or highlight an extra + // character if the line break is included. + // For a diff line the highlighting continues after the "$". + if (diff_hlf == (hlf_T)0 + && line_attr == 0 + && line_attr_lowprio == 0) { + // In virtualedit, visual selections may extend beyond end of line + if (area_highlighting && virtual_active() + && tocol != MAXCOL && vcol < tocol) { + n_extra = 0; + } else { + p_extra = at_end_str; + n_extra = 1; + c_extra = NUL; + c_final = NUL; + } + } + if (wp->w_p_list && wp->w_p_lcs_chars.eol > 0) { + c = wp->w_p_lcs_chars.eol; + } else { + c = ' '; + } + lcs_eol_one = -1; + ptr--; // put it back at the NUL + extra_attr = win_hl_attr(wp, HLF_AT); + n_attr = 1; + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; // don't draw as UTF-8 + } + } else if (c != NUL) { + p_extra = transchar_buf(wp->w_buffer, c); + if (n_extra == 0) { + n_extra = byte2cells(c) - 1; + } + if ((dy_flags & DY_UHEX) && wp->w_p_rl) { + rl_mirror(p_extra); // reverse "<12>" + } + c_extra = NUL; + c_final = NUL; + if (wp->w_p_lbr) { + char_u *p; + + c = *p_extra; + p = xmalloc((size_t)n_extra + 1); + memset(p, ' ', (size_t)n_extra); + STRNCPY(p, p_extra + 1, STRLEN(p_extra) - 1); // NOLINT(runtime/printf) + p[n_extra] = NUL; + xfree(p_extra_free); + p_extra_free = p_extra = p; + } else { + n_extra = byte2cells(c) - 1; + c = *p_extra++; + } + n_attr = n_extra + 1; + extra_attr = win_hl_attr(wp, HLF_8); + saved_attr2 = char_attr; // save current attr + mb_utf8 = false; // don't draw as UTF-8 + } else if (VIsual_active + && (VIsual_mode == Ctrl_V || VIsual_mode == 'v') + && virtual_active() + && tocol != MAXCOL + && vcol < tocol + && (wp->w_p_rl ? (col >= 0) : (col < grid->cols))) { + c = ' '; + ptr--; // put it back at the NUL + } + } + + if (wp->w_p_cole > 0 + && (wp != curwin || lnum != wp->w_cursor.lnum || conceal_cursor_line(wp)) + && ((syntax_flags & HL_CONCEAL) != 0 || has_match_conc > 0 || decor_conceal > 0) + && !(lnum_in_visual_area && vim_strchr((char *)wp->w_p_cocu, 'v') == NULL)) { + char_attr = conceal_attr; + if (((prev_syntax_id != syntax_seqnr && (syntax_flags & HL_CONCEAL) != 0) + || has_match_conc > 1 || decor_conceal > 1) + && (syn_get_sub_char() != NUL + || (has_match_conc && match_conc) + || (decor_conceal && decor_state.conceal_char) + || wp->w_p_cole == 1) + && wp->w_p_cole != 3) { + // First time at this concealed item: display one + // character. + if (has_match_conc && match_conc) { + c = match_conc; + } else if (decor_conceal && decor_state.conceal_char) { + c = decor_state.conceal_char; + if (decor_state.conceal_attr) { + char_attr = decor_state.conceal_attr; + } + } else if (syn_get_sub_char() != NUL) { + c = syn_get_sub_char(); + } else if (wp->w_p_lcs_chars.conceal != NUL) { + c = wp->w_p_lcs_chars.conceal; + } else { + c = ' '; + } + + prev_syntax_id = syntax_seqnr; + + if (n_extra > 0) { + vcol_off += n_extra; + } + vcol += n_extra; + if (wp->w_p_wrap && n_extra > 0) { + if (wp->w_p_rl) { + col -= n_extra; + boguscols -= n_extra; + } else { + boguscols += n_extra; + col += n_extra; + } + } + n_extra = 0; + n_attr = 0; + } else if (n_skip == 0) { + is_concealing = true; + n_skip = 1; + } + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; // don't draw as UTF-8 + } + } else { + prev_syntax_id = 0; + is_concealing = false; + } + + if (n_skip > 0 && did_decrement_ptr) { + // not showing the '>', put pointer back to avoid getting stuck + ptr++; + } + } // end of printing from buffer content + + // In the cursor line and we may be concealing characters: correct + // the cursor column when we reach its position. + if (!did_wcol && draw_state == WL_LINE + && wp == curwin && lnum == wp->w_cursor.lnum + && conceal_cursor_line(wp) + && (int)wp->w_virtcol <= vcol + n_skip) { + if (wp->w_p_rl) { + wp->w_wcol = grid->cols - col + boguscols - 1; + } else { + wp->w_wcol = col - boguscols; + } + wp->w_wrow = row; + did_wcol = true; + wp->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL; + } + + // Don't override visual selection highlighting. + if (n_attr > 0 && draw_state == WL_LINE && !search_attr_from_match) { + char_attr = hl_combine_attr(char_attr, extra_attr); + } + + // Handle the case where we are in column 0 but not on the first + // character of the line and the user wants us to show us a + // special character (via 'listchars' option "precedes:<char>". + if (lcs_prec_todo != NUL + && wp->w_p_list + && (wp->w_p_wrap ? (wp->w_skipcol > 0 && row == 0) : wp->w_leftcol > 0) + && filler_todo <= 0 + && draw_state > WL_NR + && c != NUL) { + c = wp->w_p_lcs_chars.prec; + lcs_prec_todo = NUL; + if (utf_char2cells(mb_c) > 1) { + // Double-width character being overwritten by the "precedes" + // character, need to fill up half the character. + c_extra = MB_FILLER_CHAR; + c_final = NUL; + n_extra = 1; + n_attr = 2; + extra_attr = win_hl_attr(wp, HLF_AT); + } + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; // don't draw as UTF-8 + } + saved_attr3 = char_attr; // save current attr + char_attr = win_hl_attr(wp, HLF_AT); // overwriting char_attr + n_attr3 = 1; + } + + // At end of the text line or just after the last character. + if (c == NUL && eol_hl_off == 0) { + // flag to indicate whether prevcol equals startcol of search_hl or + // one of the matches + bool prevcol_hl_flag = get_prevcol_hl_flag(wp, &screen_search_hl, + (long)(ptr - line) - 1); + + // Invert at least one char, used for Visual and empty line or + // highlight match at end of line. If it's beyond the last + // char on the screen, just overwrite that one (tricky!) Not + // needed when a '$' was displayed for 'list'. + if (wp->w_p_lcs_chars.eol == lcs_eol_one + && ((area_attr != 0 && vcol == fromcol + && (VIsual_mode != Ctrl_V + || lnum == VIsual.lnum + || lnum == curwin->w_cursor.lnum)) + // highlight 'hlsearch' match at end of line + || prevcol_hl_flag)) { + int n = 0; + + if (wp->w_p_rl) { + if (col < 0) { + n = 1; + } + } else { + if (col >= grid->cols) { + n = -1; + } + } + if (n != 0) { + // At the window boundary, highlight the last character + // instead (better than nothing). + off += n; + col += n; + } else { + // Add a blank character to highlight. + schar_from_ascii(linebuf_char[off], ' '); + } + if (area_attr == 0 && !has_fold) { + // Use attributes from match with highest priority among + // 'search_hl' and the match list. + get_search_match_hl(wp, &screen_search_hl, (long)(ptr - line), &char_attr); + } + + int eol_attr = char_attr; + if (cul_attr) { + eol_attr = hl_combine_attr(cul_attr, eol_attr); + } + linebuf_attr[off] = eol_attr; + if (wp->w_p_rl) { + col--; + off--; + } else { + col++; + off++; + } + vcol++; + eol_hl_off = 1; + } + // Highlight 'cursorcolumn' & 'colorcolumn' past end of the line. + if (wp->w_p_wrap) { + v = wp->w_skipcol; + } else { + v = wp->w_leftcol; + } + + // check if line ends before left margin + if (vcol < v + col - win_col_off(wp)) { + vcol = v + col - win_col_off(wp); + } + // Get rid of the boguscols now, we want to draw until the right + // edge for 'cursorcolumn'. + col -= boguscols; + // boguscols = 0; // Disabled because value never read after this + + if (draw_color_col) { + draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols); + } + + bool has_virttext = false; + // Make sure alignment is the same regardless + // if listchars=eol:X is used or not. + int eol_skip = (wp->w_p_lcs_chars.eol == lcs_eol_one && eol_hl_off == 0 + ? 1 : 0); + + if (has_decor) { + has_virttext = decor_redraw_eol(wp->w_buffer, &decor_state, &line_attr, + col + eol_skip); + } + + if (((wp->w_p_cuc + && (int)wp->w_virtcol >= VCOL_HLC - eol_hl_off + && (int)wp->w_virtcol < + (long)grid->cols * (row - startrow + 1) + v + && lnum != wp->w_cursor.lnum) + || draw_color_col || line_attr_lowprio || line_attr + || diff_hlf != (hlf_T)0 || has_virttext)) { + int rightmost_vcol = 0; + int i; + + if (wp->w_p_cuc) { + rightmost_vcol = wp->w_virtcol; + } + + if (draw_color_col) { + // determine rightmost colorcolumn to possibly draw + for (i = 0; color_cols[i] >= 0; i++) { + if (rightmost_vcol < color_cols[i]) { + rightmost_vcol = color_cols[i]; + } + } + } + + int cuc_attr = win_hl_attr(wp, HLF_CUC); + int mc_attr = win_hl_attr(wp, HLF_MC); + + int diff_attr = 0; + if (diff_hlf == HLF_TXD) { + diff_hlf = HLF_CHD; + } + if (diff_hlf != 0) { + diff_attr = win_hl_attr(wp, (int)diff_hlf); + } + + int base_attr = hl_combine_attr(line_attr_lowprio, diff_attr); + if (base_attr || line_attr || has_virttext) { + rightmost_vcol = INT_MAX; + } + + int col_stride = wp->w_p_rl ? -1 : 1; + + while (wp->w_p_rl ? col >= 0 : col < grid->cols) { + schar_from_ascii(linebuf_char[off], ' '); + col += col_stride; + if (draw_color_col) { + draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols); + } + + int col_attr = base_attr; + + if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol) { + col_attr = cuc_attr; + } else if (draw_color_col && VCOL_HLC == *color_cols) { + col_attr = mc_attr; + } + + col_attr = hl_combine_attr(col_attr, line_attr); + + linebuf_attr[off] = col_attr; + off += col_stride; + + if (VCOL_HLC >= rightmost_vcol) { + break; + } + + vcol += 1; + } + } + + // TODO(bfredl): integrate with the common beyond-the-end-loop + if (wp->w_buffer->terminal) { + // terminal buffers may need to highlight beyond the end of the + // logical line + int n = wp->w_p_rl ? -1 : 1; + while (col >= 0 && col < grid->cols) { + schar_from_ascii(linebuf_char[off], ' '); + linebuf_attr[off] = vcol >= TERM_ATTRS_MAX ? 0 : term_attrs[vcol]; + off += n; + vcol += n; + col += n; + } + } + + draw_virt_text(wp, buf, win_col_offset, &col, grid->cols, row); + grid_put_linebuf(grid, row, 0, col, grid->cols, wp->w_p_rl, wp, bg_attr, false); + row++; + + // Update w_cline_height and w_cline_folded if the cursor line was + // updated (saves a call to plines_win() later). + if (wp == curwin && lnum == curwin->w_cursor.lnum) { + curwin->w_cline_row = startrow; + curwin->w_cline_height = row - startrow; + curwin->w_cline_folded = foldinfo.fi_lines > 0; + curwin->w_valid |= (VALID_CHEIGHT|VALID_CROW); + conceal_cursor_used = conceal_cursor_line(curwin); + } + break; + } + + // Show "extends" character from 'listchars' if beyond the line end and + // 'list' is set. + if (wp->w_p_lcs_chars.ext != NUL + && draw_state == WL_LINE + && wp->w_p_list + && !wp->w_p_wrap + && filler_todo <= 0 + && (wp->w_p_rl ? col == 0 : col == grid->cols - 1) + && !has_fold + && (*ptr != NUL + || lcs_eol_one > 0 + || (n_extra && (c_extra != NUL || *p_extra != NUL)))) { + c = wp->w_p_lcs_chars.ext; + char_attr = win_hl_attr(wp, HLF_AT); + mb_c = c; + if (utf_char2len(c) > 1) { + mb_utf8 = true; + u8cc[0] = 0; + c = 0xc0; + } else { + mb_utf8 = false; + } + } + + // advance to the next 'colorcolumn' + if (draw_color_col) { + draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols); + } + + // Highlight the cursor column if 'cursorcolumn' is set. But don't + // highlight the cursor position itself. + // Also highlight the 'colorcolumn' if it is different than + // 'cursorcolumn' + // Also highlight the 'colorcolumn' if 'breakindent' and/or 'showbreak' + // options are set + vcol_save_attr = -1; + if ((draw_state == WL_LINE + || draw_state == WL_BRI + || draw_state == WL_SBR) + && !lnum_in_visual_area + && search_attr == 0 + && area_attr == 0 + && filler_todo <= 0) { + if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol + && lnum != wp->w_cursor.lnum) { + vcol_save_attr = char_attr; + char_attr = hl_combine_attr(win_hl_attr(wp, HLF_CUC), char_attr); + } else if (draw_color_col && VCOL_HLC == *color_cols) { + vcol_save_attr = char_attr; + char_attr = hl_combine_attr(win_hl_attr(wp, HLF_MC), char_attr); + } + } + + // Apply lowest-priority line attr now, so everything can override it. + if (draw_state == WL_LINE) { + char_attr = hl_combine_attr(line_attr_lowprio, char_attr); + } + + // Store character to be displayed. + // Skip characters that are left of the screen for 'nowrap'. + vcol_prev = vcol; + if (draw_state < WL_LINE || n_skip <= 0) { + // + // Store the character. + // + if (wp->w_p_rl && utf_char2cells(mb_c) > 1) { + // A double-wide character is: put first half in left cell. + off--; + col--; + } + if (mb_utf8) { + schar_from_cc(linebuf_char[off], mb_c, u8cc); + } else { + schar_from_ascii(linebuf_char[off], (char)c); + } + if (multi_attr) { + linebuf_attr[off] = multi_attr; + multi_attr = 0; + } else { + linebuf_attr[off] = char_attr; + } + + if (utf_char2cells(mb_c) > 1) { + // Need to fill two screen columns. + off++; + col++; + // UTF-8: Put a 0 in the second screen char. + linebuf_char[off][0] = 0; + if (draw_state > WL_NR && filler_todo <= 0) { + vcol++; + } + // When "tocol" is halfway through a character, set it to the end of + // the character, otherwise highlighting won't stop. + if (tocol == vcol) { + tocol++; + } + if (wp->w_p_rl) { + // now it's time to backup one cell + off--; + col--; + } + } + if (wp->w_p_rl) { + off--; + col--; + } else { + off++; + col++; + } + } else if (wp->w_p_cole > 0 && is_concealing) { + n_skip--; + vcol_off++; + if (n_extra > 0) { + vcol_off += n_extra; + } + if (wp->w_p_wrap) { + // Special voodoo required if 'wrap' is on. + // + // Advance the column indicator to force the line + // drawing to wrap early. This will make the line + // take up the same screen space when parts are concealed, + // so that cursor line computations aren't messed up. + // + // To avoid the fictitious advance of 'col' causing + // trailing junk to be written out of the screen line + // we are building, 'boguscols' keeps track of the number + // of bad columns we have advanced. + if (n_extra > 0) { + vcol += n_extra; + if (wp->w_p_rl) { + col -= n_extra; + boguscols -= n_extra; + } else { + col += n_extra; + boguscols += n_extra; + } + n_extra = 0; + n_attr = 0; + } + + if (utf_char2cells(mb_c) > 1) { + // Need to fill two screen columns. + if (wp->w_p_rl) { + boguscols--; + col--; + } else { + boguscols++; + col++; + } + } + + if (wp->w_p_rl) { + boguscols--; + col--; + } else { + boguscols++; + col++; + } + } else { + if (n_extra > 0) { + vcol += n_extra; + n_extra = 0; + n_attr = 0; + } + } + } else { + n_skip--; + } + + // Only advance the "vcol" when after the 'number' or 'relativenumber' + // column. + if (draw_state > WL_NR + && filler_todo <= 0) { + vcol++; + } + + if (vcol_save_attr >= 0) { + char_attr = vcol_save_attr; + } + + // restore attributes after "predeces" in 'listchars' + if (draw_state > WL_NR && n_attr3 > 0 && --n_attr3 == 0) { + char_attr = saved_attr3; + } + + // restore attributes after last 'listchars' or 'number' char + if (n_attr > 0 && draw_state == WL_LINE && --n_attr == 0) { + char_attr = saved_attr2; + } + + // At end of screen line and there is more to come: Display the line + // so far. If there is no more to display it is caught above. + if ((wp->w_p_rl ? (col < 0) : (col >= grid->cols)) + && foldinfo.fi_lines == 0 + && (draw_state != WL_LINE + || *ptr != NUL + || filler_todo > 0 + || (wp->w_p_list && wp->w_p_lcs_chars.eol != NUL + && p_extra != at_end_str) + || (n_extra != 0 + && (c_extra != NUL || *p_extra != NUL)))) { + bool wrap = wp->w_p_wrap // Wrapping enabled. + && filler_todo <= 0 // Not drawing diff filler lines. + && lcs_eol_one != -1 // Haven't printed the lcs_eol character. + && row != endrow - 1 // Not the last line being displayed. + && (grid->cols == Columns // Window spans the width of the screen, + || ui_has(kUIMultigrid)) // or has dedicated grid. + && !wp->w_p_rl; // Not right-to-left. + + int draw_col = col - boguscols; + if (filler_todo > 0) { + int index = filler_todo - (filler_lines - n_virt_lines); + if (index > 0) { + int i = (int)kv_size(virt_lines) - index; + assert(i >= 0); + int offset = kv_A(virt_lines, i).left_col ? 0 : win_col_offset; + draw_virt_text_item(buf, offset, kv_A(virt_lines, i).line, + kHlModeReplace, grid->cols, offset); + } + } else { + draw_virt_text(wp, buf, win_col_offset, &draw_col, grid->cols, row); + } + + grid_put_linebuf(grid, row, 0, draw_col, grid->cols, wp->w_p_rl, wp, bg_attr, wrap); + if (wrap) { + ScreenGrid *current_grid = grid; + int current_row = row, dummy_col = 0; // dummy_col unused + grid_adjust(¤t_grid, ¤t_row, &dummy_col); + + // Force a redraw of the first column of the next line. + current_grid->attrs[current_grid->line_offset[current_row + 1]] = -1; + + // Remember that the line wraps, used for modeless copy. + current_grid->line_wraps[current_row] = true; + } + + boguscols = 0; + row++; + + // When not wrapping and finished diff lines, or when displayed + // '$' and highlighting until last column, break here. + if ((!wp->w_p_wrap && filler_todo <= 0) || lcs_eol_one == -1) { + break; + } + + // When the window is too narrow draw all "@" lines. + if (draw_state != WL_LINE && filler_todo <= 0) { + win_draw_end(wp, '@', ' ', true, row, wp->w_grid.rows, HLF_AT); + row = endrow; + } + + // When line got too long for screen break here. + if (row == endrow) { + row++; + break; + } + + col = 0; + off = 0; + if (wp->w_p_rl) { + col = grid->cols - 1; // col is not used if breaking! + off += col; + } + + // reset the drawing state for the start of a wrapped line + draw_state = WL_START; + saved_n_extra = n_extra; + saved_p_extra = p_extra; + saved_c_extra = c_extra; + saved_c_final = c_final; + saved_char_attr = char_attr; + n_extra = 0; + lcs_prec_todo = wp->w_p_lcs_chars.prec; + if (filler_todo <= 0) { + need_showbreak = true; + } + filler_todo--; + // When the filler lines are actually below the last line of the + // file, don't draw the line itself, break here. + if (filler_todo == 0 && (wp->w_botfill || end_fill)) { + break; + } + } + } // for every character in the line + + // After an empty line check first word for capital. + if (*skipwhite((char *)line) == NUL) { + capcol_lnum = lnum + 1; + cap_col = 0; + } + + kv_destroy(virt_lines); + xfree(p_extra_free); + return row; +} |