From 1827d03696e86b9c15aa71c3ebcdf1039545b399 Mon Sep 17 00:00:00 2001 From: Karl Heuer Date: Fri, 18 Mar 1994 04:18:37 +0000 Subject: [PATCH] (compute_motion): Doc fixes. --- src/indent.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/src/indent.c b/src/indent.c index 5eef49c3a16..83122d3b0db 100644 --- a/src/indent.c +++ b/src/indent.c @@ -401,6 +401,11 @@ struct position val_compute_motion; and vpos give its cartesian location. I'm not clear on what the other members are. + Note that FROMHPOS and TOHPOS should be expressed in real screen + columns, taking HSCROLL and the truncation glyph at the left margin + into account. That is, beginning-of-line moves you to the hpos + -HSCROLL + (HSCROLL > 0). + For example, to find the buffer position of column COL of line LINE of a certain window, pass the window's starting location as FROM and the window's upper-left coordinates as FROMVPOS and FROMHPOS. @@ -422,12 +427,12 @@ struct position val_compute_motion; FRAME_HAS_VERTICAL_SCROLL_BARS (XFRAME (WINDOW_FRAME (window))) and frame_width = FRAME_WIDTH (XFRAME (window->frame)) - Or, - window_internal_width (w) - 1 + Or you can let window_internal_width do this all for you, and write: + window_internal_width (w) - 1 The `-1' accounts for the continuation-line backslashes; the rest accounts for window borders if the window is split horizontally, and - the scroll bars if the frame supports them. */ + the scroll bars if they are turned on. */ struct position * compute_motion (from, fromvpos, fromhpos, to, tovpos, tohpos, width, hscroll, tab_offset) @@ -537,7 +542,7 @@ compute_motion (from, fromvpos, fromhpos, to, tovpos, tohpos, width, hscroll, ta vpos++; hpos = 0; hpos -= hscroll; - if (hscroll > 0) hpos++; /* Count the $ on column 0 */ + if (hscroll > 0) hpos++; /* Truncation glyph on column 0 */ tab_offset = 0; } } -- 2.39.5