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tweaks: when appropriate, move starting point of justified region back 

This makes things simpler, so that I can understand them.
master
Benno Schulenberg 2020-03-09 11:33:16 +01:00
parent dc05defb8a
commit d7875cdf4f
1 changed files with 18 additions and 28 deletions
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38
src/text.c
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@ -1768,6 +1768,10 @@ void do_justify(bool full_justify)
lead_len = quote_len + indent_length(startline->data + quote_len);
the_lead = measured_copy(startline->data, lead_len);
/* When the region starts IN the lead, take the whole lead. */
if (start_x <= lead_len)
start_x = 0;
/* Recede over any preceding whitespace. This effectively snips
* trailing blanks from what will become the preceding paragraph. */
while (start_x > 0 && is_blank_mbchar(&startline->data[start_x - 1]))
@ -1855,24 +1859,17 @@ void do_justify(bool full_justify)
if (openfile->mark) {
size_t line_len = strlen(cutbuffer->data), indent_len;
size_t needed_top_extra = (start_x < lead_len ? start_x : lead_len);
size_t needed_bot_extra = (end_x < lead_len ? lead_len - end_x : 0);
linestruct *line;
/* If the marked region starts in the middle of a line, and this line
* has a leading part, prepend any missing portion of this leading part
* to the first line of the extracted region. */
if (needed_top_extra > 0) {
cutbuffer->data = charealloc(cutbuffer->data,
line_len + needed_top_extra + 1);
memmove(cutbuffer->data + needed_top_extra, cutbuffer->data,
line_len + 1);
strncpy(cutbuffer->data, the_lead, needed_top_extra);
line_len += needed_top_extra;
/* When no portion was missing, nothing needs removing later. */
if (start_x > lead_len)
needed_top_extra = 0;
/* If the marked region started in the middle of a line, and this line
* has a leading part, then prepend this same leading part also to the
* first line of the extracted region. */
if (start_x > 0 && lead_len > 0) {
cutbuffer->data = charealloc(cutbuffer->data, line_len + lead_len + 1);
memmove(cutbuffer->data + lead_len, cutbuffer->data, line_len + 1);
strncpy(cutbuffer->data, the_lead, lead_len);
line_len += lead_len;
}
indent_len = indent_length(cutbuffer->data + lead_len);
@ -1900,21 +1897,14 @@ void do_justify(bool full_justify)
} else
rewrap_paragraph(&line, the_lead, lead_len);
/* If the marked region started after the beginning of a line, insert
* a new line before the new paragraph. But if the region started in
* the middle of the line's leading part, no new line is needed: just
* remove the (now-redundant) addition we made earlier. */
/* If the marked region started in the middle of a line,
* insert a newline before the new paragraph. */
if (start_x > 0) {
if (needed_top_extra > 0)
memmove(cutbuffer->data, cutbuffer->data + needed_top_extra,
strlen(cutbuffer->data) - needed_top_extra + 1);
else {
cutbuffer->prev = make_new_node(NULL);
cutbuffer->prev->data = copy_of("");
cutbuffer->prev->next = cutbuffer;
cutbuffer = cutbuffer->prev;
}
}
/* If the marked region ended in the middle of a line, insert a new
* line after the new paragraph. If the region ended in the middle