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correctly bounds-check cursor before doing snapping operations

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This commit is contained in:
Ryan Fleury
2024-10-30 06:20:11 -07:00
parent 327fec3155
commit 37b27a9cff
1 changed files with 26 additions and 20 deletions
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src/raddbg/raddbg_views.c
+26 -20
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@@ -617,6 +617,9 @@ rd_code_view_build(Arena *arena, RD_CodeViewState *cv, RD_CodeViewBuildFlags fla
//
if(text_info->lines_count != 0)
{
TxtPt cursor = rd_regs()->cursor;
B32 cursor_in_range = (1 <= cursor.line && cursor.line <= text_info->lines_count);
// rjf: contain => snap
if(cv->contain_cursor && text_info->lines_count != 0)
{
@@ -629,31 +632,34 @@ rd_code_view_build(Arena *arena, RD_CodeViewState *cv, RD_CodeViewBuildFlags fla
if(cv->center_cursor && text_info->lines_count != 0)
{
cv->center_cursor = 0;
String8 cursor_line = str8_substr(text_data, text_info->lines_ranges[rd_regs()->cursor.line-1]);
F32 cursor_advance = fnt_dim_from_tag_size_string(code_font, code_font_size, 0, code_tab_size, str8_prefix(cursor_line, rd_regs()->cursor.column-1)).x;
// rjf: scroll x
if(cursor_in_range)
{
S64 new_idx = (S64)(cursor_advance - code_area_dim.x/2);
new_idx = Clamp(scroll_idx_rng[Axis2_X].min, new_idx, scroll_idx_rng[Axis2_X].max);
ui_scroll_pt_target_idx(&scroll_pos.x, new_idx);
snap[Axis2_X] = 0;
}
// rjf: scroll y
{
S64 new_idx = (rd_regs()->cursor.line-1) - num_possible_visible_lines/2 + 2;
new_idx = Clamp(scroll_idx_rng[Axis2_Y].min, new_idx, scroll_idx_rng[Axis2_Y].max);
ui_scroll_pt_target_idx(&scroll_pos.y, new_idx);
snap[Axis2_Y] = 0;
String8 cursor_line = str8_substr(text_data, text_info->lines_ranges[cursor.line-1]);
F32 cursor_advance = fnt_dim_from_tag_size_string(code_font, code_font_size, 0, code_tab_size, str8_prefix(cursor_line, cursor.column-1)).x;
// rjf: scroll x
{
S64 new_idx = (S64)(cursor_advance - code_area_dim.x/2);
new_idx = Clamp(scroll_idx_rng[Axis2_X].min, new_idx, scroll_idx_rng[Axis2_X].max);
ui_scroll_pt_target_idx(&scroll_pos.x, new_idx);
snap[Axis2_X] = 0;
}
// rjf: scroll y
{
S64 new_idx = (cursor.line-1) - num_possible_visible_lines/2 + 2;
new_idx = Clamp(scroll_idx_rng[Axis2_Y].min, new_idx, scroll_idx_rng[Axis2_Y].max);
ui_scroll_pt_target_idx(&scroll_pos.y, new_idx);
snap[Axis2_Y] = 0;
}
}
}
// rjf: snap in X
if(snap[Axis2_X])
if(snap[Axis2_X] && cursor_in_range)
{
String8 cursor_line = str8_substr(text_data, text_info->lines_ranges[rd_regs()->cursor.line-1]);
S64 cursor_off = (S64)(fnt_dim_from_tag_size_string(code_font, code_font_size, 0, code_tab_size, str8_prefix(cursor_line, rd_regs()->cursor.column-1)).x + priority_margin_width_px + catchall_margin_width_px + line_num_width_px);
String8 cursor_line = str8_substr(text_data, text_info->lines_ranges[cursor.line-1]);
S64 cursor_off = (S64)(fnt_dim_from_tag_size_string(code_font, code_font_size, 0, code_tab_size, str8_prefix(cursor_line, cursor.column-1)).x + priority_margin_width_px + catchall_margin_width_px + line_num_width_px);
Rng1S64 visible_pixel_range =
{
scroll_pos.x.idx,
@@ -674,7 +680,7 @@ rd_code_view_build(Arena *arena, RD_CodeViewState *cv, RD_CodeViewBuildFlags fla
// rjf: snap in Y
if(snap[Axis2_Y])
{
Rng1S64 cursor_visibility_range = r1s64(rd_regs()->cursor.line-4, rd_regs()->cursor.line+4);
Rng1S64 cursor_visibility_range = r1s64(cursor.line-4, cursor.line+4);
cursor_visibility_range.min = ClampBot(0, cursor_visibility_range.min);
cursor_visibility_range.max = ClampBot(0, cursor_visibility_range.max);
S64 min_delta = Min(0, cursor_visibility_range.min-(target_visible_line_num_range.min));