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tweaks: swap the names of two variables, to make more sense 

An iterator should not be called "start_col", because it is only the
starting column at the very beginning.

Also, start_col (after the rename) can never be /larger/ than column.
master
Benno Schulenberg 2017-04-28 14:05:07 +02:00
parent 03ecbf3d55
commit 1f55c8819b
2 changed files with 30 additions and 35 deletions
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3
src/proto.h
View File

@ -638,8 +638,7 @@ void blank_edit(void);
void blank_statusbar(void);
void blank_bottombars(void);
void check_statusblank(void);
char *display_string(const char *buf, size_t start_col, size_t span,
bool dollars);
char *display_string(const char *buf, size_t column, size_t span, bool isdata);
void titlebar(const char *path);
extern void set_modified(void);
void statusbar(const char *msg);

62
src/winio.c
View File

@ -1805,31 +1805,29 @@ void check_statusblank(void)
edit_refresh();
}
/* Convert buf into a string that can be displayed on screen. The
* caller wants to display buf starting with column start_col, and
* extending for at most span columns. start_col is zero-based. span
* is one-based, so span == 0 means you get "" returned. The returned
* string is dynamically allocated, and should be freed. If isdata is
* TRUE, the caller might put "$" at the beginning or end of the line if
* it's too long. */
char *display_string(const char *buf, size_t start_col, size_t span,
bool isdata)
/* Convert buf into a string that can be displayed on screen. The caller
* wants to display buf starting with the given column, and extending for
* at most span columns. column is zero-based, and span is one-based, so
* span == 0 means you get "" returned. The returned string is dynamically
* allocated, and should be freed. If isdata is TRUE, the caller might put
* "$" at the beginning or end of the line if it's too long. */
char *display_string(const char *buf, size_t column, size_t span, bool isdata)
{
size_t start_index;
/* Index in buf of the first character shown. */
size_t column;
size_t start_col;
/* Screen column that start_index corresponds to. */
char *converted;
/* The string we return. */
/* The expanded string we will return. */
size_t index;
/* Current position in converted. */
size_t beyond = start_col + span;
size_t beyond = column + span;
/* The column number just beyond the last shown character. */
start_index = actual_x(buf, start_col);
column = strnlenpt(buf, start_index);
start_index = actual_x(buf, column);
start_col = strnlenpt(buf, start_index);
assert(column <= start_col);
assert(start_col <= column);
index = 0;
#ifdef USING_OLD_NCURSES
@ -1842,32 +1840,31 @@ char *display_string(const char *buf, size_t start_col, size_t span,
/* If the first character starts before the left edge, or would be
* overwritten by a "$" token, then show placeholders instead. */
if (*buf != '\0' && *buf != '\t' && (column < start_col ||
(column > 0 && isdata && !ISSET(SOFTWRAP)))) {
if (*buf != '\0' && *buf != '\t' && (start_col < column ||
(start_col > 0 && isdata && !ISSET(SOFTWRAP)))) {
if (is_cntrl_mbchar(buf)) {
if (column < start_col) {
if (start_col < column) {
converted[index++] = control_mbrep(buf, isdata);
start_col++;
column++;
buf += parse_mbchar(buf, NULL, NULL);
}
}
#ifdef ENABLE_UTF8
else if (mbwidth(buf) == 2) {
if (column >= start_col) {
if (start_col == column) {
converted[index++] = ' ';
start_col++;
column++;
}
/* Display the right half of a two-column character as '<'. */
converted[index++] = '<';
start_col++;
column++;
buf += parse_mbchar(buf, NULL, NULL);
}
#endif
}
while (*buf != '\0' && start_col < beyond) {
while (*buf != '\0' && column < beyond) {
int charlength, charwidth = 1;
if (*buf == ' ') {
@ -1881,7 +1878,7 @@ char *display_string(const char *buf, size_t start_col, size_t span,
} else
#endif
converted[index++] = ' ';
start_col++;
column++;
buf++;
continue;
} else if (*buf == '\t') {
@ -1895,11 +1892,11 @@ char *display_string(const char *buf, size_t start_col, size_t span,
} else
#endif
converted[index++] = ' ';
start_col++;
column++;
/* Fill the tab up with the required number of spaces. */
while (start_col % tabsize != 0) {
while (column % tabsize != 0) {
converted[index++] = ' ';
start_col++;
column++;
}
buf++;
continue;
@ -1911,7 +1908,7 @@ char *display_string(const char *buf, size_t start_col, size_t span,
if (is_cntrl_mbchar(buf)) {
converted[index++] = '^';
converted[index++] = control_mbrep(buf, isdata);
start_col += 2;
column += 2;
buf += charlength;
continue;
}
@ -1921,7 +1918,7 @@ char *display_string(const char *buf, size_t start_col, size_t span,
for (; charlength > 0; charlength--)
converted[index++] = *(buf++);
start_col += charwidth;
column += charwidth;
#ifdef USING_OLD_NCURSES
if (charwidth > 1)
seen_wide = TRUE;
@ -1933,8 +1930,7 @@ char *display_string(const char *buf, size_t start_col, size_t span,
converted[index++] = '\xEF';
converted[index++] = '\xBF';
converted[index++] = '\xBD';
start_col += 1;
column++;
buf++;
/* For invalid codepoints, skip extra bytes. */
@ -1943,7 +1939,7 @@ char *display_string(const char *buf, size_t start_col, size_t span,
}
/* If there is more text than can be shown, make room for the $ or >. */
if (*buf != '\0' && (start_col > beyond || (isdata && !ISSET(SOFTWRAP)))) {
if (*buf != '\0' && (column > beyond || (isdata && !ISSET(SOFTWRAP)))) {
index = move_mbleft(converted, index);
#ifdef ENABLE_UTF8