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Ensure the line is correctly clamped in scroll_window

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Seems like the previous implementation was not always doing that
correctly, so just use an obviously correct method.

Fixes #951
This commit is contained in:
Maxime Coste 2016-12-10 13:33:42 +00:00
parent 0f486666e0
commit 5d9f3b7f3f
1 changed files with 4 additions and 2 deletions
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6
src/input_handler.cc
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@ -1515,9 +1515,11 @@ void scroll_window(Context& context, LineCount offset)
SelectionList& selections = context.selections(); SelectionList& selections = context.selections();
const BufferCoord cursor = selections.main().cursor(); const BufferCoord cursor = selections.main().cursor();
auto line = clamp(cursor.line, win_pos.line + scrolloff.line,
win_pos.line + win_dim.line - 1 - scrolloff.line);
line = clamp(line, 0_line, line_count-1);
using std::min; using std::max; using std::min; using std::max;
auto line = clamp(cursor.line, max(0_line, win_pos.line + scrolloff.line),
min(line_count-1, win_pos.line + win_dim.line - 1 - scrolloff.line));
// This is not exactly a clamp, and must be done in this order as // This is not exactly a clamp, and must be done in this order as
// byte_count_to could return line length // byte_count_to could return line length
auto col = min(max(cursor.column, buffer[line].byte_count_to(win_pos.column)), auto col = min(max(cursor.column, buffer[line].byte_count_to(win_pos.column)),