Vim'中使用了什么算法;s`gq`段落填充?
Vim使用什么算法将段落分成行以填充段落(Vim'中使用了什么算法;s`gq`段落填充?,vim,Vim,Vim使用什么算法将段落分成行以填充段落(gq)? 它是一个简单的贪婪算法,就像Emacs中使用的算法一样,还是像TeX中使用的更复杂的算法? 最重要的是,我应该在哪里查看源代码以确认所使用的算法?第一步是:help gq和:help formatoptions。在那之后,我只需下载整个源代码,然后将其彻底删除。如果所有这些都失败了,我会搜索vim dev的档案,并可能在那里询问更多细节。与许多vim产品一样,它是可定制的。默认情况下是贪婪算法(“在空格后会断开一条长于[code>textwid
gq
)?
它是一个简单的贪婪算法,就像Emacs中使用的算法一样,还是像TeX中使用的更复杂的算法?
最重要的是,我应该在哪里查看源代码以确认所使用的算法?第一步是
:help gq
和:help formatoptions
。在那之后,我只需下载整个源代码,然后将其彻底删除。如果所有这些都失败了,我会搜索vim dev的档案,并可能在那里询问更多细节。与许多vim产品一样,它是可定制的。默认情况下是贪婪算法(“在空格后会断开一条长于[code>textwidth]的行以获得此宽度”),但通过设置formatexpr
,您可以使用vimscript格式化段落,并通过设置formatprg
(例如,设置为fmt
或par
)您可以将控制权交给外部程序。您可以获得vim的源代码。下载它,格式化功能位于vim/src/ops.c行:4710
。您可能还想看看
格式化行(行计数,避免)
行数(行数);;
int避免_fex;/*不要使用“formatexpr”*/
{
int max_len;
int不是par;/*当前行不是parag的一部分*/
int next_是_not_par;/*下一行不是段落的一部分*/
int是段落末尾的_end _par;/**/
int prev_是_end_par=FALSE;/*上一行不是段落的一部分*/
int next_为_start_par=FALSE;
#ifdef壮举注释
int leader_len=0;/*当前行的leader len*/
int next_leader_len;/*下一行的leader len*/
char_*leader_flags=NULL;/*当前行的前导标志*/
char_*next_leader_flags;/*下一行的leader标志*/
int do_注释;/*格式注释*/
int do_comments_list=0;/*将注释格式化为“n”或“2”*/
#恩迪夫
int advance=真;
int second_indent=-1;/*第二行的缩进(注释
*意识到)*/
int do_第二次缩进;
int do_编号\u缩进;
int do_trail_white;
int first_par_line=TRUE;
int smd_save;
长计数;
int need_set_indent=TRUE;/*设置下一段的缩进*/
int-force_格式=FALSE;
int old_State=状态;
/*强制格式化的行长度:3*“tw”*/
最大长度=复合文本宽度(真)*3;
/*检查“formatoptions”中的“q”、“2”和“1”*/
#ifdef壮举注释
do_comments=具有格式选项(FO_Q_COMS);
#恩迪夫
do_second_indent=具有格式选项(FO_Q_second);
do_number_indent=具有格式选项(FO_Q_number);
do_trail_white=具有格式选项(FO_white_PAR);
/*
*获取有关上一行和当前行的信息。
*/
如果(curwin->w_cursor.lnum>1)
不是吗?参数=fmt\u check\u par(curwin->w\u cursor.lnum-1
#ifdef壮举注释
,&leader\u len,&leader\u标志,do\u注释
#恩迪夫
);
其他的
是不是;
下一步是\u not \u par=fmt\u check\u par(curwin->w\u cursor.lnum
#ifdef壮举注释
,&下一个领导人,下一个领导人,做评论
#恩迪夫
);
is_end_par=(is_not_par | next_not_par);
如果(!是否为尾翼和尾翼为白色)
is_end_par=!end_为白色(curwin->w_cursor.lnum-1);
curwin->w_cursor.lnum--;
for(count=line\u count;count!=0&&!got\u int;--count)
{
/*
*进入下一段。
*/
如果(预付款)
{
curwin->w_cursor.lnum++;
prev_is_end_par=is_end_par;
is_not_par=下一个_not_par;
#ifdef壮举注释
leader\u len=下一个\u leader\u len;
领导标志=下一个领导标志;
#恩迪夫
}
/*
*要格式化的最后一行。
*/
if(count==1 | | curwin->w_cursor.lnum==curbuf->b|ml.ml_line_count)
{
下一步是不正确的;
#ifdef壮举注释
下一个\u leader\u len=0;
next_leader_flags=NULL;
#恩迪夫
}
其他的
{
下一步是\u not \u par=fmt\u check\u par(curwin->w\u cursor.lnum+1
#ifdef壮举注释
,&下一个领导人,下一个领导人,做评论
#恩迪夫
);
如果(不缩进编号)
下一步是开始=
(获取数字缩进(curwin->w\u cursor.lnum+1)>0);
}
前进=正确;
is_end_par=(is_not_par | next_not_par | next_not|u par | next_is_start_par);
如果(!是否为尾翼和尾翼为白色)
is_end_par=!end_为白色(curwin->w_cursor.lnum);
/*
*跳过不在段落中的行。
*/
如果(不是标准)
{
如果(行计数<0)
打破
}
其他的
{
/*
*对于段落的第一行,检查第二行的缩进。
*不要对注释和空行执行此操作。
*/
如果(第一条基准线)
&&(第二次缩进|第二次缩进|第二次缩进)
&&上一页是最后一页
&&curwin->w_cursor.lnumb_ml.ml_line_count)
{
if(第二次缩进和第二行为空(curwin->w\u cursor.lnum+1))
{
#ifdef壮举注释
if(leader\u len==0和next\u leader\u len==0)
{
/*未找到任何评论*/
#恩迪夫
第二缩进=
获取缩进值(curwin->w\u cursor.lnum+1);
#ifdef壮举注释
}
其他的
{
第二个缩进=下一个领导者;
do_comments_list=1;
}
#恩迪夫
}
else if(是否进行编号缩进)
{
#ifdef壮举注释
if(leader\u len==0和next\u leader\u len==0)
{
/*未找到任何评论*/
#恩迪夫
第二缩进=
获取数字缩进(curwin->w\u cursor.lnum);
#ifdef壮举注释
}
format_lines(line_count, avoid_fex)
linenr_T line_count;
int avoid_fex; /* don't use 'formatexpr' */
{
int max_len;
int is_not_par; /* current line not part of parag. */
int next_is_not_par; /* next line not part of paragraph */
int is_end_par; /* at end of paragraph */
int prev_is_end_par = FALSE;/* prev. line not part of parag. */
int next_is_start_par = FALSE;
#ifdef FEAT_COMMENTS
int leader_len = 0; /* leader len of current line */
int next_leader_len; /* leader len of next line */
char_u *leader_flags = NULL; /* flags for leader of current line */
char_u *next_leader_flags; /* flags for leader of next line */
int do_comments; /* format comments */
int do_comments_list = 0; /* format comments with 'n' or '2' */
#endif
int advance = TRUE;
int second_indent = -1; /* indent for second line (comment
* aware) */
int do_second_indent;
int do_number_indent;
int do_trail_white;
int first_par_line = TRUE;
int smd_save;
long count;
int need_set_indent = TRUE; /* set indent of next paragraph */
int force_format = FALSE;
int old_State = State;
/* length of a line to force formatting: 3 * 'tw' */
max_len = comp_textwidth(TRUE) * 3;
/* check for 'q', '2' and '1' in 'formatoptions' */
#ifdef FEAT_COMMENTS
do_comments = has_format_option(FO_Q_COMS);
#endif
do_second_indent = has_format_option(FO_Q_SECOND);
do_number_indent = has_format_option(FO_Q_NUMBER);
do_trail_white = has_format_option(FO_WHITE_PAR);
/*
* Get info about the previous and current line.
*/
if (curwin->w_cursor.lnum > 1)
is_not_par = fmt_check_par(curwin->w_cursor.lnum - 1
#ifdef FEAT_COMMENTS
, &leader_len, &leader_flags, do_comments
#endif
);
else
is_not_par = TRUE;
next_is_not_par = fmt_check_par(curwin->w_cursor.lnum
#ifdef FEAT_COMMENTS
, &next_leader_len, &next_leader_flags, do_comments
#endif
);
is_end_par = (is_not_par || next_is_not_par);
if (!is_end_par && do_trail_white)
is_end_par = !ends_in_white(curwin->w_cursor.lnum - 1);
curwin->w_cursor.lnum--;
for (count = line_count; count != 0 && !got_int; --count)
{
/*
* Advance to next paragraph.
*/
if (advance)
{
curwin->w_cursor.lnum++;
prev_is_end_par = is_end_par;
is_not_par = next_is_not_par;
#ifdef FEAT_COMMENTS
leader_len = next_leader_len;
leader_flags = next_leader_flags;
#endif
}
/*
* The last line to be formatted.
*/
if (count == 1 || curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
{
next_is_not_par = TRUE;
#ifdef FEAT_COMMENTS
next_leader_len = 0;
next_leader_flags = NULL;
#endif
}
else
{
next_is_not_par = fmt_check_par(curwin->w_cursor.lnum + 1
#ifdef FEAT_COMMENTS
, &next_leader_len, &next_leader_flags, do_comments
#endif
);
if (do_number_indent)
next_is_start_par =
(get_number_indent(curwin->w_cursor.lnum + 1) > 0);
}
advance = TRUE;
is_end_par = (is_not_par || next_is_not_par || next_is_start_par);
if (!is_end_par && do_trail_white)
is_end_par = !ends_in_white(curwin->w_cursor.lnum);
/*
* Skip lines that are not in a paragraph.
*/
if (is_not_par)
{
if (line_count < 0)
break;
}
else
{
/*
* For the first line of a paragraph, check indent of second line.
* Don't do this for comments and empty lines.
*/
if (first_par_line
&& (do_second_indent || do_number_indent)
&& prev_is_end_par
&& curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
{
if (do_second_indent && !lineempty(curwin->w_cursor.lnum + 1))
{
#ifdef FEAT_COMMENTS
if (leader_len == 0 && next_leader_len == 0)
{
/* no comment found */
#endif
second_indent =
get_indent_lnum(curwin->w_cursor.lnum + 1);
#ifdef FEAT_COMMENTS
}
else
{
second_indent = next_leader_len;
do_comments_list = 1;
}
#endif
}
else if (do_number_indent)
{
#ifdef FEAT_COMMENTS
if (leader_len == 0 && next_leader_len == 0)
{
/* no comment found */
#endif
second_indent =
get_number_indent(curwin->w_cursor.lnum);
#ifdef FEAT_COMMENTS
}
else
{
/* get_number_indent() is now "comment aware"... */
second_indent =
get_number_indent(curwin->w_cursor.lnum);
do_comments_list = 1;
}
#endif
}
}
/*
* When the comment leader changes, it's the end of the paragraph.
*/
if (curwin->w_cursor.lnum >= curbuf->b_ml.ml_line_count
#ifdef FEAT_COMMENTS
|| !same_leader(curwin->w_cursor.lnum,
leader_len, leader_flags,
next_leader_len, next_leader_flags)
#endif
)
is_end_par = TRUE;
/*
* If we have got to the end of a paragraph, or the line is
* getting long, format it.
*/
if (is_end_par || force_format)
{
if (need_set_indent)
/* replace indent in first line with minimal number of
* tabs and spaces, according to current options */
(void)set_indent(get_indent(), SIN_CHANGED);
/* put cursor on last non-space */
State = NORMAL; /* don't go past end-of-line */
coladvance((colnr_T)MAXCOL);
while (curwin->w_cursor.col && vim_isspace(gchar_cursor()))
dec_cursor();
/* do the formatting, without 'showmode' */
State = INSERT; /* for open_line() */
smd_save = p_smd;
p_smd = FALSE;
insertchar(NUL, INSCHAR_FORMAT
#ifdef FEAT_COMMENTS
+ (do_comments ? INSCHAR_DO_COM : 0)
+ (do_comments && do_comments_list
? INSCHAR_COM_LIST : 0)
#endif
+ (avoid_fex ? INSCHAR_NO_FEX : 0), second_indent);
State = old_State;
p_smd = smd_save;
second_indent = -1;
/* at end of par.: need to set indent of next par. */
need_set_indent = is_end_par;
if (is_end_par)
{
/* When called with a negative line count, break at the
* end of the paragraph. */
if (line_count < 0)
break;
first_par_line = TRUE;
}
force_format = FALSE;
}
/*
* When still in same paragraph, join the lines together. But
* first delete the comment leader from the second line.
*/
if (!is_end_par)
{
advance = FALSE;
curwin->w_cursor.lnum++;
curwin->w_cursor.col = 0;
if (line_count < 0 && u_save_cursor() == FAIL)
break;
#ifdef FEAT_COMMENTS
(void)del_bytes((long)next_leader_len, FALSE, FALSE);
if (next_leader_len > 0)
mark_col_adjust(curwin->w_cursor.lnum, (colnr_T)0, 0L,
(long)-next_leader_len);
#endif
curwin->w_cursor.lnum--;
if (do_join(2, TRUE, FALSE, FALSE) == FAIL)
{
beep_flush();
break;
}
first_par_line = FALSE;
/* If the line is getting long, format it next time */
if (STRLEN(ml_get_curline()) > (size_t)max_len)
force_format = TRUE;
else
force_format = FALSE;
}
}
line_breakcheck();
}
}