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text: move the indenting of a single line into its own function

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This is modeled after the undo/redo code for commenting.  do_indent() now
calls indent_a_line() on each line it covers.  The latter function will
eventually be used by the undo/redo code.
This commit is contained in:
David Lawrence Ramsey 2017-07-13 17:22:10 -05:00 committed by Benno Schulenberg
parent ae25e15d61
commit 57d7f8852d
1 changed files with 30 additions and 24 deletions
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54
src/text.c
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@ -275,6 +275,32 @@ void do_tab(void)
}
#ifndef NANO_TINY
/* Add an indent to the line in f. */
void indent_a_line(filestruct *f, char *line_indent)
{
size_t line_indent_len = strlen(line_indent);
size_t line_len = strlen(f->data);
/* If the indent is empty, don't change the line. */
if (line_indent_len == 0)
return;
/* Add the fabricated indentation to the beginning of the line. */
f->data = charealloc(f->data, line_len + line_indent_len + 1);
charmove(&f->data[line_indent_len], f->data, line_len + 1);
strncpy(f->data, line_indent, line_indent_len);
openfile->totsize += line_indent_len;
/* Compensate for the change in the current line. */
if (openfile->mark_set && f == openfile->mark_begin)
openfile->mark_begin_x += line_indent_len;
if (f == openfile->current) {
openfile->current_x += line_indent_len;
openfile->placewewant = xplustabs();
}
}
/* Indent the current line (or the marked lines) by tabsize columns.
* This inserts either a tab character or a tab's worth of spaces,
* depending on whether --tabstospaces is in effect. */
@ -282,8 +308,6 @@ void do_indent(void)
{
char *line_indent = charalloc(tabsize + 1);
/* The whitespace added to each line in order to indent it. */
size_t line_indent_len = 0;
/* The number of bytes added to each line in order to indent it. */
filestruct *top, *bot, *f;
size_t top_x, bot_x;
@ -311,35 +335,17 @@ void do_indent(void)
/* Set the indentation to either a bunch of spaces or a single tab. */
if (ISSET(TABS_TO_SPACES)) {
charset(line_indent, ' ', tabsize);
line_indent_len = tabsize;
line_indent[tabsize] = '\0';
} else {
line_indent[0] = '\t';
line_indent_len = 1;
line_indent[1] = '\0';
}
line_indent[line_indent_len] = '\0';
/* Go through each of the lines, but skip empty ones. */
for (f = top; f != bot->next; f = f->next) {
size_t line_len = strlen(f->data);
char *real_indent = (f->data[0] == '\0') ? "" : line_indent;
if (f->data[0] == '\0')
continue;
/* Add the fabricated indentation to the beginning of the line. */
f->data = charealloc(f->data, line_len + line_indent_len + 1);
charmove(&f->data[line_indent_len], f->data, line_len + 1);
strncpy(f->data, line_indent, line_indent_len);
openfile->totsize += line_indent_len;
/* Compensate for the change in the current line. */
if (openfile->mark_set && f == openfile->mark_begin)
openfile->mark_begin_x += line_indent_len;
if (f == openfile->current) {
openfile->current_x += line_indent_len;
openfile->placewewant = xplustabs();
}
indent_a_line(f, real_indent);
}
free(line_indent);