Commit d43fbe9d authored by Gerd Moellmann's avatar Gerd Moellmann
Browse files

Comment fixes.

parent 624ef9b3
......@@ -10839,15 +10839,14 @@ find_last_row_displaying_text (matrix, it, start)
/* Return the last row in the current matrix of W that is not affected
by changes at the start of current_buffer that occurred since the
last time W was redisplayed. Value is null if no such row exists.
by changes at the start of current_buffer that occurred since W's
current matrix was built. Value is null if no such row exists.
The global variable beg_unchanged has to contain the number of
bytes unchanged at the start of current_buffer. BEG +
beg_unchanged is the buffer position of the first changed byte in
current_buffer. Characters at positions < BEG + beg_unchanged are
at the same buffer positions as they were when the current matrix
was built. */
BEG_UNCHANGED us the number of characters unchanged at the start of
current_buffer. BEG + BEG_UNCHANGED is the buffer position of the
first changed character in current_buffer. Characters at positions <
BEG + BEG_UNCHANGED are at the same buffer positions as they were
when the current matrix was built. */
static struct glyph_row *
find_last_unchanged_at_beg_row (w)
......@@ -10888,12 +10887,16 @@ find_last_unchanged_at_beg_row (w)
/* Find the first glyph row in the current matrix of W that is not
affected by changes at the end of current_buffer since the last
time the window was redisplayed. Return in *DELTA the number of
chars by which buffer positions in unchanged text at the end of
current_buffer must be adjusted. Return in *DELTA_BYTES the
corresponding number of bytes. Value is null if no such row
exists, i.e. all rows are affected by changes. */
affected by changes at the end of current_buffer since the
time W's current matrix was built.
Return in *DELTA the number of chars by which buffer positions in
unchanged text at the end of current_buffer must be adjusted.
Return in *DELTA_BYTES the corresponding number of bytes.
Value is null if no such row exists, i.e. all rows are affected by
changes. */
static struct glyph_row *
find_first_unchanged_at_end_row (w, delta, delta_bytes)
......@@ -10938,8 +10941,8 @@ find_first_unchanged_at_end_row (w, delta, delta_bytes)
/* Set last_unchanged_pos to the buffer position of the last
character in the buffer that has not been changed. Z is the
index + 1 of the last byte in current_buffer, i.e. by
subtracting end_unchanged we get the index of the last
index + 1 of the last character in current_buffer, i.e. by
subtracting END_UNCHANGED we get the index of the last
unchanged character, and we have to add BEG to get its buffer
position. */
last_unchanged_pos = Z - END_UNCHANGED + BEG;
......@@ -11086,8 +11089,6 @@ row_containing_pos (w, charpos, start, end)
7. Update W's window end information. */
/* Check that window end is what we expect it to be. */
static int
try_window_id (w)
struct window *w;
......@@ -11143,12 +11144,11 @@ try_window_id (w)
{
struct glyph_row *r0 = MATRIX_FIRST_TEXT_ROW (current_matrix);
int delta = CHARPOS (start) - MATRIX_ROW_START_CHARPOS (r0);
int delta_bytes = BYTEPOS (start) - MATRIX_ROW_START_BYTEPOS (r0);
if (delta)
if (delta || delta_bytes)
{
struct glyph_row *r1 = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w);
int delta_bytes = BYTEPOS (start) - MATRIX_ROW_START_BYTEPOS (r0);
increment_matrix_positions (w->current_matrix,
MATRIX_ROW_VPOS (r0, current_matrix),
MATRIX_ROW_VPOS (r1, current_matrix),
......
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