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|
/* $Id$ */
#include "bbs.h"
/*
* "pmore" is "piaip's more", NOT "PTT's more"!!!
*
* piaip's new implementation of pager(more) with mmap,
* designed for unlimilited length(lines).
*
* Author: Hung-Te Lin (piaip), June 2005.
* <piaip@csie.ntu.edu.tw>
*
* MAJOR IMPROVEMENTS:
* - Clean source code, and more readble to mortal
* - Correct navigation
* - Excellent search ability (for correctness and user behavior)
* - Less memory consumption (mmap is not considered anyway)
* - Better support for large terminals
* - Unlimited file length and line numbers
*
* TODO:
* - Speed up with supporting Scroll [done]
* - Support PTT_PRINTS [done]
* - Wrap long lines [done]
* - left-right wide navigation
* - Big5 truncation
* - BBSMovie Support
*
* WONTDO:
* - The message seperator line is different from old more.
* I decided to abandon the old style (which is buggy).
* > old style: increase one line to show seperator
* > pmore style: use blank line for seperator.
* - However I've changed my mind. Now this can be simulated
* with wrapping. See Features section to enable
* PMORE_TRADITIONAL_SEPERATOR if you REALLY eager for this.
* HOWEVER IT MAY BE SLOW BECAUSE OPTIMIZED SCROLL IS DISABLED
* IN WRAPPING MODE.
*
* HINTS:
* - Remember mmap pointers are NOT null terminated strings.
* You have to use strn* APIs and make sure not exceeding mmap buffer.
* DO NOT USE strcmp, strstr, strchr, ...
* - Scroll handling is painful. If you displayed anything on screen,
* remember to MFDISP_DIRTY();
* - To be portable between most BBS systems, pmore is designed to
* workaround most BBS bugs inside itself.
*/
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <string.h>
// Platform Related. NoSync is faster but if we don't have it...
#ifdef MAP_NOSYNC
#define MF_MMAP_OPTION (MAP_NOSYNC)
#else
#define MF_MMAP_OPTION (MAP_SHARED)
#endif
// --------------------------------------------------------------- <FEATURES>
#define PMORE_USE_PTT_PRINTS // PTT or special printing
#define PMORE_USE_OPT_SCROLL // optimized scroll
#define PMORE_PRELOAD_SIZE (128*1024L) // on busy system set smaller or undef
//#define PMORE_TRADITIONAL_SEPERATOR // display seperator with extra space
//#define PMORE_TRADITIONAL_STATUSBAR // if you really love that
// -------------------------------------------------------------- </FEATURES>
//#define DEBUG
int debug = 0;
// --------------------------------------------- <Defines and constants>
// --------------------------- <Display>
// Escapes. I don't like \033 everywhere.
#define ESC_NUM (0x1b)
#define ESC_STR "\x1b"
#define ESC_CHR '\x1b'
// Common ANSI commands.
#define ANSI_RESET ESC_STR "[m"
#define ANSI_COLOR(x) ESC_STR "[" #x "m"
#define STR_ANSICODE "[0123456789;,"
// Poor BBS terminal system Workarounds
// - Most BBS implements clrtoeol() as fake command
// and usually messed up when output ANSI quoted string.
// - A workaround is suggested by kcwu:
// https://opensvn.csie.org/traccgi/pttbbs/trac.cgi/changeset/519
#define FORCE_CLRTOEOL() outs(ESC_STR "[K")
// --------------------------- </Display>
// --------------------------- <Main Navigation>
typedef struct
{
unsigned char
*start, *end, // file buffer
*disps, *dispe, // disply start/end
*maxdisps; // a very special pointer,
// consider as "disps of last page"
off_t len; // file total length
long lineno, // lineno of disps
oldlineno, // last drawn lineno, < 0 means full update
//
wraplines, // wrapped lines in last display
dispedlines, // how many different lines displayed
// usually dispedlines = PAGE-wraplines,
// but if last line is incomplete(wrapped),
// dispedlines = PAGE-wraplines + 1
lastpagelines,// lines of last page to show
// this indicates how many lines can
// maxdisps(maxlinenoS) display.
maxlinenoS; // lineno of maxdisps, "S"!
// What does the magic "S" mean?
// Just trying to notify you that it's
// NOT REAL MAX LINENO NOR FILELENGTH!!!
// You may consider "S" of "Start" (disps).
} MmappedFile;
MmappedFile mf = {
0, 0, 0, 0, 0, 0L,
0, 0, 0, -1L, -1L, -1L
}; // current file
/* mf_* navigation commands return value meanings */
enum {
MFNAV_OK, // navigation ok
MFNAV_EXCEED, // request exceeds buffer
} MF_NAV_COMMANDS;
/* Navigation units (dynamic, so not in enum const) */
#define MFNAV_PAGE (t_lines-2) // when navigation, how many lines in a page to move
/* Display system */
enum {
/* newline method (because of poor BBS implementation) */
MFDISP_NEWLINE_CLEAR = 0, // \n and cleartoeol
MFDISP_NEWLINE_SKIP,
MFDISP_NEWLINE_MOVE, // use move to simulate newline.
MFDISP_WRAP_TRUNCATE = 0,
MFDISP_WRAP_WRAP,
} MF_DISP_CONST;
#define MFDISP_PAGE (t_lines-1) // the real number of lines to be shown.
#define MFDISP_DIRTY() { mf.oldlineno = -1; }
/* Indicators */
#define MFDISP_TRUNC_INDICATOR ANSI_COLOR(0;1;37) ">" ANSI_RESET
#define MFDISP_WRAP_INDICATOR ANSI_COLOR(0;1;37) "\\" ANSI_RESET
// --------------------------- </Main Navigation>
// --------------------------- <Aux. Structures>
/* browsing preference */
typedef struct
{
/* mode flags */
unsigned short int
rawmode, // show file as-is.
wrapmode, // wrap?
indicator; // show wrap indicators?
} MF_BrowsingPrefrence;
MF_BrowsingPrefrence bpref =
{ 0, MFDISP_WRAP_WRAP, 1, };
/* pretty format header */
#define FH_HEADERS (4) // how many headers do we know?
#define FH_HEADER_LEN (4) // strlen of each heads
static const char *_fh_disp_heads[FH_HEADERS] =
{"作者", "標題", "時間", "轉信"};
typedef struct
{
int lines; // header lines
unsigned char *headers[FH_HEADERS];
unsigned char *floats[2]; // right floating, name and val
} MF_PrettyFormattedHeader;
MF_PrettyFormattedHeader fh = { 0, {0,0,0,0}, {0, 0}};
/* search records */
typedef struct
{
int len;
int (*cmpfunc) (const char *, const char *, size_t);
char search_str[81]; // maybe we can change to dynamic allocation
} MF_SearchRecord;
MF_SearchRecord sr = { 0, strncmp, "" };
enum {
MFSEARCH_FORWARD,
MFSEARCH_BACKWARD,
} MFSEARCH_DIRECTION;
// Reset structures
#define RESETMF() { memset(&mf, 0, sizeof(mf)); \
mf.lastpagelines = mf.maxlinenoS = mf.oldlineno = -1; }
#define RESETFH() { memset(&fh, 0, sizeof(fh)); \
fh.lines = -1; }
// --------------------------- </Aux. Structures>
// --------------------------------------------- </Defines and constants>
// used by mf_attach
void mf_parseHeaders();
void mf_freeHeaders();
void mf_determinemaxdisps(int);
/*
* mmap basic operations
*/
int
mf_attach(unsigned char *fn)
{
struct stat st;
int fd = open(fn, O_RDONLY, 0600);
if(fd < 0)
return 0;
if (fstat(fd, &st) || ((mf.len = st.st_size) <= 0) || S_ISDIR(st.st_mode))
{
mf.len = 0;
close(fd);
return 0;
}
/*
mf.len = lseek(fd, 0L, SEEK_END);
lseek(fd, 0, SEEK_SET);
*/
mf.start = mmap(NULL, mf.len, PROT_READ,
MF_MMAP_OPTION, fd, 0);
close(fd);
if(mf.start == MAP_FAILED)
{
RESETMF();
return 0;
}
mf.end = mf.start + mf.len;
mf.disps = mf.dispe = mf.start;
mf.lineno = 0;
mf_determinemaxdisps(MFNAV_PAGE);
mf.disps = mf.dispe = mf.start;
mf.lineno = 0;
/* reset and parse article header */
mf_parseHeaders();
return 1;
}
void
mf_detach()
{
if(mf.start) {
munmap(mf.start, mf.len);
RESETMF();
}
mf_freeHeaders();
}
/*
* lineno calculation, and moving
*/
void
mf_sync_lineno()
{
unsigned char *p;
if(mf.disps == mf.maxdisps && mf.maxlinenoS >= 0)
{
mf.lineno = mf.maxlinenoS;
} else {
mf.lineno = 0;
for (p = mf.start; p < mf.disps; p++)
if(*p == '\n')
mf.lineno ++;
if(mf.disps == mf.maxdisps && mf.maxlinenoS < 0)
mf.maxlinenoS = mf.lineno;
}
}
int mf_backward(int); // used by mf_buildmaxdisps
void
mf_determinemaxdisps(int backlines)
{
unsigned char *pbak = mf.disps, *mbak = mf.maxdisps;
long lbak = mf.lineno;
if( mf.lastpagelines >= 0 &&
mf.lastpagelines <= backlines)
return;
mf.disps = mf.end - 1;
mf_backward(backlines);
if(mf.disps != mbak)
{
mf.maxdisps = mf.disps;
mf.lastpagelines = backlines;
mf.maxlinenoS = -1;
#ifdef PMORE_PRELOAD_SIZE
if(mf.len <= PMORE_PRELOAD_SIZE)
mf_sync_lineno(); // maxlinenoS will be automatically updated
#endif
}
mf.disps = pbak;
mf.lineno = lbak;
}
/*
* mf_backwards is also used for maxno determination,
* so we cannot change anything in mf except these:
* mf.disps
* mf.lineno
*/
int
mf_backward(int lines)
{
int flFirstLine = 1;
// first, because we have to trace back to line beginning,
// add one line.
lines ++;
// now try to rollback for lines
if(lines == 1)
{
/* special case! just rollback to start */
while ( mf.disps > mf.start &&
*(mf.disps-1) != '\n')
mf.disps --;
mf.disps --;
lines --;
}
else while(mf.disps > mf.start && lines > 0)
{
while (mf.disps > mf.start && *--mf.disps != '\n');
if(flFirstLine)
{
flFirstLine = 0; lines--;
continue;
}
if(mf.disps >= mf.start)
mf.lineno--, lines--;
}
if(mf.disps == mf.start)
mf.lineno = 0;
else
mf.disps ++;
if(lines > 0)
return MFNAV_OK;
else
return MFNAV_EXCEED;
}
int
mf_forward(int lines)
{
while(mf.disps <= mf.maxdisps && lines > 0)
{
while (mf.disps <= mf.maxdisps && *mf.disps++ != '\n');
if(mf.disps <= mf.maxdisps)
mf.lineno++, lines--;
}
if(mf.disps > mf.maxdisps)
mf.disps = mf.maxdisps;
/* please make sure you have lineno synced. */
if(mf.disps == mf.maxdisps && mf.maxlinenoS < 0)
mf.maxlinenoS = mf.lineno;
if(lines > 0)
return MFNAV_OK;
else
return MFNAV_EXCEED;
}
int
mf_goTop()
{
mf.disps = mf.start;
mf.lineno = 0;
return MFNAV_OK;
}
int
mf_goBottom()
{
mf.disps = mf.maxdisps;
mf_sync_lineno();
return MFNAV_OK;
}
int
mf_goto(int lineno)
{
mf.disps = mf.start;
mf.lineno = 0;
return mf_forward(lineno);
}
int
mf_viewedNone()
{
return (mf.disps <= mf.start);
}
int
mf_viewedAll()
{
return (mf.dispe >= mf.end);
}
/*
* search!
*/
int
mf_search(int direction)
{
unsigned char *s = sr.search_str;
int l = sr.len;
int flFound = 0;
if(!*s)
return 0;
if(direction == MFSEARCH_FORWARD)
{
mf_forward(1);
while(mf.disps < mf.end - l)
{
if(sr.cmpfunc(mf.disps, s, l) == 0)
{
flFound = 1;
break;
} else
mf.disps ++;
}
mf_backward(0);
if(mf.disps > mf.maxdisps)
mf.disps = mf.maxdisps;
mf_sync_lineno();
}
else if(direction == MFSEARCH_BACKWARD)
{
mf_backward(1);
while (!flFound && mf.disps > mf.start)
{
while(!flFound && mf.disps < mf.end-l && *mf.disps != '\n')
{
if(sr.cmpfunc(mf.disps, s, l) == 0)
{
flFound = 1;
} else
mf.disps ++;
}
if(!flFound)
mf_backward(1);
}
mf_backward(0);
if(mf.disps < mf.start)
mf.disps = mf.start;
mf_sync_lineno();
}
if(flFound)
MFDISP_DIRTY();
return flFound;
}
/* String Processing
*
* maybe you already have your string processors (or not).
* whether yes or no, here we provides some.
*/
void
pmore_str_strip_ansi(unsigned char *p) // warning: p is NULL terminated
{
unsigned char *pb = p;
while (*p != 0)
{
if (*p == ESC_CHR)
{
// ansi code sequence, ignore them.
pb = p++;
while (*p && strchr(STR_ANSICODE, *p++));
memmove(pb, p, strlen(p)+1);
p = pb;
}
else if (*p < ' ')
{
// control codes, ignore them.
memmove(p, p+1, strlen(p+1)+1);
}
else
p++;
}
}
/* this chomp is a little different:
* it kills starting and trailing spaces.
*/
void
pmore_str_chomp(unsigned char *p)
{
unsigned char *pb = p + strlen(p)-1;
while (pb >= p)
if(isascii(*pb) && isspace(*pb))
*pb-- = 0;
else
break;
pb = p;
while (*pb && isascii(*pb) && isspace(*pb))
pb++;
if(pb != p)
memmove(p, pb, strlen(pb)+1);
}
int
pmore_str_safe_big5len(unsigned char *p)
{
return 0;
}
/*
* Format Related
*/
void
mf_freeHeaders()
{
if(fh.lines > 0)
{
int i;
for (i = 0; i < FH_HEADERS; i++)
if(fh.headers[i])
free(fh.headers[i]);
for (i = 0; i < sizeof(fh.floats) / sizeof(unsigned char*); i++)
free(fh.floats[i]);
RESETFH();
}
}
void
mf_parseHeaders()
{
/* file format:
* AUTHOR: author BOARD: blah <- headers[0], flaots[0], floats[1]
* XXX: xxx <- headers[1]
* XXX: xxx <- headers[n]
* [blank, fill with seperator] <- lines
*
* #define STR_AUTHOR1 "作者:"
* #define STR_AUTHOR2 "發信人:"
*/
unsigned char *pmf = mf.start;
int i = 0;
RESETFH();
if(mf.len < LEN_AUTHOR2)
return;
if (strncmp(mf.start, STR_AUTHOR1, LEN_AUTHOR1) == 0)
{
fh.lines = 3; // local
}
else if (strncmp(mf.start, STR_AUTHOR2, LEN_AUTHOR2) == 0)
{
fh.lines = 4;
}
else
return;
for (i = 0; i < fh.lines; i++)
{
unsigned char *p = pmf, *pb = pmf;
int l;
/* first, go to line-end */
while(pmf < mf.end && *pmf != '\n')
pmf++;
if(pmf >= mf.end)
break;
p = pmf;
pmf ++; // move to next line.
// p is pointing at a new line. (\n)
l = (int)(p - pb);
p = (unsigned char*) malloc (l+1);
fh.headers[i] = p;
memcpy(p, pb, l);
p[l] = 0;
// now, postprocess p.
pmore_str_strip_ansi(p);
// strip to quotes[+1 space]
if((pb = strchr(p, ':')) != NULL)
{
if(*(pb+1) == ' ') pb++;
memmove(p, pb, strlen(pb)+1);
}
// kill staring and trailing spaces
pmore_str_chomp(p);
// special case, floats are in line[0].
if(i == 0 && (pb = strrchr(p, ':')) != NULL && *(pb+1))
{
unsigned char *np = strdup(pb+1);
fh.floats[1] = np;
pmore_str_chomp(np);
// remove quote and traverse back
*pb-- = 0;
while (pb > p && *pb != ',' && !(isascii(*pb) && isspace(*pb)))
pb--;
if (pb > p) {
fh.floats[0] = strdup(pb+1);
pmore_str_chomp(fh.floats[0]);
*pb = 0;
pmore_str_chomp(fh.headers[0]);
} else {
fh.floats[0] = strdup("");
}
}
}
}
/*
* mf_disp utility macros
*/
inline static void
MFDISP_SKIPCURLINE()
{
while (mf.dispe < mf.end && *mf.dispe != '\n')
mf.dispe++;
}
inline static int
MFDISP_DBCS_HEADERWIDTH(int originalw)
{
return originalw - (originalw %2);
// return (originalw >> 1) << 1;
}
/*
* display mf content from disps for MFDISP_PAGE
*/
void
mf_disp()
{
int lines = 0, col = 0, currline = 0, wrapping = 0;
int startline = 0, endline = MFDISP_PAGE-1;
/* why t_columns-1 here?
* because BBS systems usually have a poor terminal system
* and many stupid clients behave differently.
* So we try to avoid using the last column, leave it for
* BBS to place '\n' and CLRTOEOL.
*/
const int headerw = MFDISP_DBCS_HEADERWIDTH(t_columns-1);
const int dispw = headerw - (t_columns - headerw < 2);
const int maxcol = dispw - 1;
if(mf.wraplines)
MFDISP_DIRTY(); // we can't scroll with wrapped lines.
mf.wraplines = 0;
mf.dispedlines = 0;
#ifdef PMORE_USE_OPT_SCROLL
/* process scrolling */
if (mf.oldlineno >= 0 && mf.oldlineno != mf.lineno)
{
int scrll = mf.lineno - mf.oldlineno, i;
int reverse = (scrll > 0 ? 0 : 1);
if(reverse)
scrll = -scrll;
else
{
/* because bottom status line is also scrolled,
* we have to erase it here.
*/
move(b_lines, 0);
clrtoeol();
}
if(scrll > MFDISP_PAGE)
scrll = MFDISP_PAGE;
i = scrll;
while(i-- > 0)
if (reverse)
rscroll(); // v
else
scroll(); // ^
if(reverse)
{
startline = 0; // v
endline = scrll-1;
// clear the line which will be scrolled
// to bottom (status line position).
move(b_lines, 0);
clrtoeol();
}
else
{
startline = MFDISP_PAGE - scrll; // ^
endline = MFDISP_PAGE - 1;
}
move(startline, 0);
// return; // uncomment if you want to observe scrolling
}
else
#endif
clear(), move(0, 0);
mf.dispe = mf.disps;
while (lines < MFDISP_PAGE)
{
int inAnsi = 0;
int newline = MFDISP_NEWLINE_CLEAR;
currline = mf.lineno + lines;
col = 0;
if(!wrapping && mf.dispe < mf.end)
mf.dispedlines++;
/* Is currentline visible? */
if (lines < startline || lines > endline)
{
while(mf.dispe < mf.end && *mf.dispe != '\n')
mf.dispe++;
newline = MFDISP_NEWLINE_SKIP;
}
/* Now, consider what kind of line
* (header, seperator, or normal text)
* is current line.
*/
else if (!bpref.rawmode && currline == fh.lines)
{
/* case 1, header seperator line */
outs(ANSI_COLOR(36));
for(col = 0; col < headerw; col+=2)
{
// prints("%02d", col);
outs("─");
}
outs(ANSI_RESET);
#ifdef PMORE_TRADITIONAL_SEPERATOR
/* Traditional 'more' adds seperator as a newline.
* This is buggy, however we can support this
* by using wrapping features.
* Anyway I(piaip) don't like this. And using wrap
* leads to slow display (we cannt speed it up with
* optimized scrolling.
*/
if(bpref.wrapmode == MFDISP_WRAP_WRAP)
{
/* we have to do all wrapping stuff
* in normal text section.
* make sure this is updated.
*/
wrapping = 1;
mf.wraplines ++;
endline = MFDISP_PAGE-1;
if(mf.dispe > mf.start &&
mf.dispe < mf.end &&
*mf.dispe == '\n')
mf.dispe --;
}
else
#endif
MFDISP_SKIPCURLINE();
}
else if (!bpref.rawmode && currline < fh.lines)
{
/* case 2, we're printing headers */
const char *val = fh.headers[currline];
const char *name = _fh_disp_heads[currline];
int w = headerw - FH_HEADER_LEN - 3;
outs(ANSI_COLOR(47;34) " ");
outs(name);
outs(" " ANSI_COLOR(44;37) " ");
/* right floating stuff? */
if (currline == 0 && fh.floats[0])
{
w -= strlen(fh.floats[0]) + strlen(fh.floats[1]) + 4;
}
prints("%-*.*s", w, w,
(val ? val : ""));
if (currline == 0 && fh.floats[0])
{
outs(ANSI_COLOR(47;34) " ");
outs(fh.floats[0]);
outs(" " ANSI_COLOR(44;37) " ");
outs(fh.floats[1]);
outs(" ");
}
outs(ANSI_RESET);
MFDISP_SKIPCURLINE();
}
else if(mf.dispe < mf.end)
{
/* case 3, normal text */
long dist = mf.end - mf.dispe;
long flResetColor = 0;
int srlen = -1;
int breaknow = 0;
// first check quote
if(!bpref.rawmode)
{
if(dist > 1 &&
(*mf.dispe == ':' || *mf.dispe == '>') &&
*(mf.dispe+1) == ' ')
{
outs(ANSI_COLOR(36));
flResetColor = 1;
} else if (dist > 2 &&
(!strncmp(mf.dispe, "※", 2) ||
!strncmp(mf.dispe, "==>", 3)))
{
outs(ANSI_COLOR(32));
flResetColor = 1;
}
}
while(!breaknow && mf.dispe < mf.end && *mf.dispe != '\n')
{
if(inAnsi)
{
if (!strchr(STR_ANSICODE, *mf.dispe))
inAnsi = 0;
if(col <= maxcol)
outc(*mf.dispe);
} else {
if(*mf.dispe == ESC_CHR)
inAnsi = 1;
else if(srlen < 0 && sr.search_str[0] && // support search
//tolower(sr.search_str[0]) == tolower(*mf.dispe) &&
mf.end - mf.dispe > sr.len &&
sr.cmpfunc(mf.dispe, sr.search_str, sr.len) == 0)
{
outs(ANSI_COLOR(7));
srlen = sr.len-1;
flResetColor = 1;
}
#ifdef PMORE_USE_PTT_PRINTS
/* special case to resolve dirty Ptt_Prints */
if(inAnsi &&
mf.end - mf.dispe > 2 &&
*(mf.dispe+1) == '*')
{
int i;
char buf[64]; // make sure ptt_prints will not exceed
memset(buf, 0, sizeof(buf));
strncpy(buf, mf.dispe, 3); // ^[[*s
mf.dispe += 2;
if(bpref.rawmode)
buf[0] = '*';
else
Ptt_prints(buf, NO_RELOAD); // result in buf
i = strlen(buf);
if (col + i > maxcol)
i = maxcol - col;
if(i > 0)
{
buf[i] = 0;
col += i;
outs(buf);
}
inAnsi = 0;
} else
#endif
{
/* if col > maxcol,
* because we have the space for
* "indicators" (one byte),
* so we can tolerate one more byte.
*/
if(col <= maxcol ||
(mf.dispe < mf.end-1 &&
*(mf.dispe+1) == '\n'))
outc(*mf.dispe);
else switch (bpref.wrapmode)
{
case MFDISP_WRAP_WRAP:
breaknow = 1;
wrapping = 1;
mf.wraplines ++;
break;
case MFDISP_WRAP_TRUNCATE:
breaknow = 1;
MFDISP_SKIPCURLINE();
wrapping = 0;
break;
}
if(!inAnsi)
{
col++;
if (srlen == 0)
outs(ANSI_RESET);
if(srlen >= 0)
srlen --;
}
}
}
if(!breaknow)
mf.dispe ++;
}
if(flResetColor)
outs(ANSI_RESET);
/* "wrapping" should be only in normal text section.
* We don't support wrap within scrolling,
* so if we have to wrap, invalidate all lines.
*/
if(breaknow)
{
if(wrapping)
endline = MFDISP_PAGE-1;
if(bpref.indicator)
{
if(wrapping)
outs(MFDISP_WRAP_INDICATOR);
else
outs(MFDISP_TRUNC_INDICATOR);
}
}
else
wrapping = 0;
}
if(mf.dispe < mf.end && *mf.dispe == '\n')
mf.dispe ++;
// else, we're in wrap mode.
switch(newline)
{
case MFDISP_NEWLINE_SKIP:
break;
case MFDISP_NEWLINE_CLEAR:
FORCE_CLRTOEOL();
outc('\n');
break;
case MFDISP_NEWLINE_MOVE:
move(lines+1, 0);
break;
}
lines ++;
}
/*
* we've displayed the file.
* but if we got wrapped lines in last page,
* mf.maxdisps may be required to be larger.
*/
if(mf.disps == mf.maxdisps && mf.dispe < mf.end)
{
mf_determinemaxdisps(0);
}
mf.oldlineno = mf.lineno;
}
/* --------------------- MAIN PROCEDURE ------------------------- */
static const char * const pmore_help[] = {
"\0閱\讀文章功\能鍵使用說明",
"\01游標移動功\能鍵",
"(j)(↑) 上捲一行",
"(k)(↓)(Enter) 下捲一行",
"(^B)(PgUp)(BackSpace) 上捲一頁",
"(^F)(PgDn)(Space)(→) 下捲一頁",
"(0)(g)(Home) 檔案開頭",
"($)(G)(End) 檔案結尾",
"(;/:) 跳至某行/某頁",
"數字鍵 1-9 跳至輸入的行號",
"\01其他功\能鍵",
"(/) 搜尋字串",
"(n/N) 重複正/反向搜尋",
"(Ctrl-T) 存到暫存檔",
"(f/b) 跳至下/上篇",
"(a/A) 跳至同一作者下/上篇",
"(t/[-/]+) 主題式閱\讀:循序/前/後篇",
"(\\/w/W) 切換顯示原始內容/自動折行/折行符號", // this IS already aligned!
"(q)(←) 結束",
"(h)(H)(?) 本說明畫面",
#ifdef DEBUG
"(d) 切換除錯(debug)模式",
#endif
"\01本系統使用 piaip 的新式瀏覽程式: pmore, piaip's more",
NULL
};
/*
* pmore utility macros
*/
inline static void
PMORE_UINAV_FORWARDPAGE()
{
/* Usually, a forward is just mf_forward(MFNAV_PAGE);
* but because of wrapped lines...
* This function is used when user tries to nagivate
* with page request.
* If you want to a real page forward, don't use this.
* That's why we have this special function.
*/
int i = mf.dispedlines - 1;
if(i < 1)
i = 1;
mf_forward(i);
}
/*
* piaip's more, a replacement for old more
*/
int
pmore(char *fpath, int promptend)
{
int flExit = 0, retval = 0;
int ch = 0;
STATINC(STAT_MORE);
if(!mf_attach(fpath))
return -1;
clear();
while(!flExit)
{
mf_disp();
if(promptend == NA && mf_viewedAll())
break;
move(b_lines, 0);
// clrtoeol(); // this shall be done in mf_disp to speed up.
/* PRINT BOTTOM STATUS BAR */
#ifdef DEBUG
if(debug)
{
/* in debug mode don't print ANSI codes
* because themselves are buggy.
*/
prints("L#%ld(w%ld) pmt=%d Dsp:%08X/%08X/%08X, "
"F:%08X/%08X(%d) tScr(%dx%d)",
mf.lineno, mf.wraplines, promptend,
(unsigned int)mf.disps,
(unsigned int)mf.maxdisps,
(unsigned int)mf.dispe,
(unsigned int)mf.start, (unsigned int)mf.end,
(int)mf.len,
t_columns,
t_lines
);
}
else
#endif
{
char *printcolor;
#ifndef PMORE_TRADITIONAL_STATUSBAR
char buf[256]; // orz
int prefixlen = 0;
int barlen = 0;
int postfix1len = 0, postfix2len = 0;
#endif
if(mf_viewedAll())
printcolor = ANSI_COLOR(37;44);
else if (mf_viewedNone())
printcolor = ANSI_COLOR(33;45);
else
printcolor = ANSI_COLOR(34;46);
outs(ANSI_RESET);
outs(printcolor);
#ifdef PMORE_TRADITIONAL_STATUSBAR
prints(" 瀏覽 P.%d(%d%%) %s %-30.30s%s",
(int)(mf.lineno / MFNAV_PAGE)+1,
(int)((unsigned long)(mf.dispe-mf.start) * 100 / mf.len),
ANSI_COLOR(31;47),
"(h)"
ANSI_COLOR(30) "求助 "
ANSI_COLOR(31) "→↓[PgUp][",
"PgDn][Home][End]"
ANSI_COLOR(30) "游標移動 "
ANSI_COLOR(31) "←[q]"
ANSI_COLOR(30) "結束 ");
#else
if(mf.maxlinenoS >= 0)
sprintf(buf,
" 瀏覽 第 %1d/%1d 頁 ",
(int)(mf.lineno / MFNAV_PAGE)+1,
(int)(mf.maxlinenoS / MFNAV_PAGE)+1
);
else
sprintf(buf,
" 瀏覽 第 %1d 頁 ",
(int)(mf.lineno / MFNAV_PAGE)+1
);
outs(buf); prefixlen += strlen(buf);
outs(ANSI_COLOR(1;30;47));
sprintf(buf,
" 閱\讀進度%3d%%, 目前顯示: 第 %02d~%02d 行",
(int)((unsigned long)(mf.dispe-mf.start) * 100 / mf.len),
(int)(mf.lineno + 1),
(int)(mf.lineno + mf.dispedlines)
);
outs(buf); prefixlen += strlen(buf);
postfix1len = 12; // check msg below
postfix2len = 10;
if (prefixlen + postfix1len + postfix2len + 1 > t_columns)
{
postfix1len = 0;
if (prefixlen + postfix1len + postfix2len + 1 > t_columns)
postfix2len = 0;
}
barlen = t_columns - 1 - postfix1len - postfix2len - prefixlen;
while(barlen-- > 0)
outc(' ');
if(postfix1len > 0)
outs(
ANSI_COLOR(0;31;47) "(h)"
ANSI_COLOR(30) "按鍵說明 "
);
if(postfix2len > 0)
outs(
ANSI_COLOR(0;31;47) "←[q]"
ANSI_COLOR(30) "離開 "
);
#endif
outs(ANSI_RESET);
FORCE_CLRTOEOL();
}
/* igetch() will do refresh(); */
ch = igetch();
switch (ch) {
/* ------------------ EXITING KEYS ------------------ */
case 'r':
case 'R':
case 'Y':
case 'y':
flExit = 1, retval = 999;
break;
case 'X':
flExit = 1, retval = 998;
break;
case 'A':
flExit = 1, retval = AUTHOR_PREV;
break;
case 'a':
flExit = 1, retval = AUTHOR_NEXT;
break;
case 'F':
case 'f':
flExit = 1, retval = READ_NEXT;
break;
case 'B':
case 'b':
flExit = 1, retval = READ_PREV;
break;
case KEY_LEFT:
case 'q':
flExit = 1, retval = FULLUPDATE;
break;
/* from Kaede, thread reading */
case ']':
case '+':
flExit = 1, retval = RELATE_NEXT;
break;
case '[':
case '-':
flExit = 1, retval = RELATE_PREV;
break;
case '=':
flExit = 1, retval = RELATE_FIRST;
break;
/* ------------------ NAVIGATION KEYS ------------------ */
/* Simple Navigation */
case 'j':
case 'J':
mf_backward(1);
break;
case 'k':
case 'K':
mf_forward(1);
break;
case Ctrl('F'):
case KEY_PGDN:
PMORE_UINAV_FORWARDPAGE();
break;
case Ctrl('B'):
case KEY_PGUP:
mf_backward(MFNAV_PAGE);
break;
case '0':
case 'g':
case KEY_HOME:
mf_goTop();
break;
case '$':
case 'G':
case KEY_END:
mf_goBottom();
break;
/* Compound Navigation */
case '\r':
case '\n':
case KEY_DOWN:
if (mf_viewedAll() ||
(promptend == 2 && (ch == '\r' || ch == '\n')))
flExit = 1, retval = READ_NEXT;
else
mf_forward(1);
break;
case ' ':
if (mf_viewedAll())
flExit = 1, retval = READ_NEXT;
else
PMORE_UINAV_FORWARDPAGE();
break;
case KEY_RIGHT:
if(mf_viewedAll())
promptend = 0, flExit = 1, retval = 0;
else
PMORE_UINAV_FORWARDPAGE();
break;
case KEY_UP:
if(mf_viewedNone())
flExit = 1, retval = READ_PREV;
else
mf_backward(1);
break;
case Ctrl('H'):
if(mf_viewedNone())
flExit = 1, retval = READ_PREV;
else
mf_backward(MFNAV_PAGE);
break;
case 't':
if (mf_viewedAll())
flExit = 1, retval = RELATE_NEXT;
else
PMORE_UINAV_FORWARDPAGE();
break;
/* ------------------ SEARCH KEYS ------------------ */
case '/':
{
char ans[4] = "n";
sr.search_str[0] = 0;
getdata_buf(b_lines - 1, 0, "[搜尋]關鍵字:", sr.search_str,
40, DOECHO);
if (sr.search_str[0]) {
if (getdata(b_lines - 1, 0, "區分大小寫(Y/N/Q)? [N] ",
ans, sizeof(ans), LCECHO) && *ans == 'y')
sr.cmpfunc = strncmp;
else
sr.cmpfunc = strncasecmp;
if (*ans == 'q')
sr.search_str[0] = 0;
}
sr.len = strlen(sr.search_str);
mf_search(MFSEARCH_FORWARD);
MFDISP_DIRTY();
}
break;
case 'n':
mf_search(MFSEARCH_FORWARD);
break;
case 'N':
mf_search(MFSEARCH_BACKWARD);
break;
/* ------------------ SPECIAL KEYS ------------------ */
case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case ';': case ':':
{
char buf[10] = "";
int i = 0;
int pageMode = (ch == ':');
if (ch >= '1' && ch <= '9')
buf[0] = ch, buf[1] = 0;
getdata_buf(b_lines-1, 0,
(pageMode ? "跳至此頁: " : "跳至此行: "),
buf, 7, DOECHO);
if(buf[0]) {
i = atoi(buf);
if(i-- > 0)
mf_goto(i * (pageMode ? MFNAV_PAGE : 1));
}
MFDISP_DIRTY();
}
break;
case Ctrl('T'):
{
char buf[10];
getdata(b_lines - 1, 0, "把這篇文章收入到暫存檔?[y/N] ",
buf, 4, LCECHO);
if (buf[0] == 'y') {
setuserfile(buf, ask_tmpbuf(b_lines - 1));
Copy(fpath, buf);
}
MFDISP_DIRTY();
}
break;
case 'h':
case 'H':
case '?':
// help
show_help(pmore_help);
MFDISP_DIRTY();
break;
case 'E':
// admin edit any files other than ve help file
if (HAS_PERM(PERM_SYSOP) && strcmp(fpath, "etc/ve.hlp")) {
mf_detach();
vedit(fpath, NA, NULL);
return 0;
}
break;
case 'w':
switch(bpref.wrapmode)
{
case MFDISP_WRAP_WRAP:
bpref.wrapmode = MFDISP_WRAP_TRUNCATE;
break;
case MFDISP_WRAP_TRUNCATE:
bpref.wrapmode = MFDISP_WRAP_WRAP;
break;
}
MFDISP_DIRTY();
break;
case 'W':
bpref.indicator = !bpref.indicator;
MFDISP_DIRTY();
break;
case '\\':
bpref.rawmode = !bpref.rawmode;
MFDISP_DIRTY();
break;
#ifdef DEBUG
case 'd':
debug = !debug;
MFDISP_DIRTY();
break;
#endif
}
}
mf_detach();
if (retval == 0 && promptend) {
pressanykey();
clear();
} else
outs(reset_color);
return retval;
}
/* vim:sw=4
*/
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