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fixed vertically small window crash issue

This commit is contained in:
Allen Webster 2016-06-02 10:45:06 -04:00
parent 58a334190d
commit f3370cfc2e
1 changed files with 44 additions and 22 deletions
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66
4ed_file_view.cpp
View File

@ -1470,27 +1470,54 @@ view_get_cursor_y(View *view){
return result;
}
#define CursorMaxY_(m,h) ((m) - (h)*3)
#define CursorMinY_(m,h) (-(m) + (h)*2)
struct Cursor_Limits{
f32 min, max;
f32 delta;
};
#define CursorMaxY(m,h) (CursorMaxY_(m,h) > 0)?(CursorMaxY_(m,h)):(0)
#define CursorMinY(m,h) (CursorMinY_(m,h) > 0)?(CursorMinY_(m,h)):(0)
inline Cursor_Limits
view_cursor_limits(View *view){
Cursor_Limits limits = {0};
f32 line_height = (f32)view->line_height;
f32 visible_height = view_file_height(view);
limits.max = visible_height - line_height*3.f;
limits.min = line_height * 2;
if (limits.max - limits.min <= line_height){
if (visible_height >= line_height){
limits.max = visible_height - line_height;
limits.min = -line_height;
}
else{
limits.max = visible_height;
limits.min = -line_height;
}
}
limits.max = (limits.max > 0)?(limits.max):(0);
limits.min = (limits.min > 0)?(limits.min):(0);
limits.delta = clamp_top(line_height*3.f, (limits.max - limits.min)*.5f);
return(limits);
}
internal void
view_move_cursor_to_view(View *view, GUI_Scroll_Vars scroll){
f32 min_target_y = 0;
i32 line_height = view->line_height;
f32 old_cursor_y = view_get_cursor_y(view);
f32 cursor_y = old_cursor_y;
f32 target_y = scroll.target_y;
f32 cursor_max_y = CursorMaxY(view_file_height(view), line_height);
f32 cursor_min_y = CursorMinY(min_target_y, line_height);
if (cursor_y > target_y + cursor_max_y){
cursor_y = target_y + cursor_max_y;
Cursor_Limits limits = view_cursor_limits(view);
if (cursor_y > target_y + limits.max){
cursor_y = target_y + limits.max;
}
if (target_y != 0 && cursor_y < target_y + cursor_min_y){
cursor_y = target_y + cursor_min_y;
if (target_y != 0 && cursor_y < target_y + limits.min){
cursor_y = target_y + limits.min;
}
if (cursor_y != old_cursor_y){
@ -1507,10 +1534,6 @@ view_move_cursor_to_view(View *view, GUI_Scroll_Vars scroll){
internal void
view_move_view_to_cursor(View *view, GUI_Scroll_Vars *scroll){
f32 line_height = (f32)view->line_height;
f32 delta_y = 3.f*line_height;
f32 max_visible_y = view_file_height(view);
f32 max_x = view_file_width(view);
f32 cursor_y = view_get_cursor_y(view);
@ -1520,14 +1543,13 @@ view_move_view_to_cursor(View *view, GUI_Scroll_Vars *scroll){
f32 target_y = scroll_vars.target_y;
f32 target_x = scroll_vars.target_x;
f32 cursor_max_y = CursorMaxY(max_visible_y, line_height);
f32 cursor_min_y = CursorMinY(0, line_height);
Cursor_Limits limits = view_cursor_limits(view);
if (cursor_y > target_y + cursor_max_y){
target_y = cursor_y - cursor_max_y + delta_y;
if (cursor_y > target_y + limits.max){
target_y = cursor_y - limits.max + limits.delta;
}
if (cursor_y < target_y + cursor_min_y){
target_y = cursor_y - delta_y - cursor_min_y;
if (cursor_y < target_y + limits.min){
target_y = cursor_y - limits.delta - limits.min;
}
target_y = clamp(0.f, target_y, scroll_vars.max_y);
@ -4693,7 +4715,7 @@ do_input_file_view(System_Functions *system,
if (scroll_button_input(target, &gui_session, user_input, id, &result.is_animating)){
result.vars.target_y += target->delta * 0.25f;
result.vars.target_y = clamp_top(0.f, result.vars.max_y);
result.vars.target_y = clamp_top(result.vars.target_y, result.vars.max_y);
}
}break;