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InputText: Fixed redo buffer exhaustion handling (rare) which could corrupt the undo character buffer. (#2333)

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This commit is contained in:
omar 2019-02-05 23:38:57 +01:00
parent 97ed97b8ce
commit c59611a3b3
2 changed files with 9 additions and 1 deletions
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2
docs/CHANGELOG.txt
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@ -41,6 +41,8 @@ Other Changes:
- Added .editorconfig file for text editors to standardize using spaces. (#2038) [@kudaba] - Added .editorconfig file for text editors to standardize using spaces. (#2038) [@kudaba]
- InputText: Fixed a bug where ESCAPE would not restore the initial value in all situations. (#2321) [@relick] - InputText: Fixed a bug where ESCAPE would not restore the initial value in all situations. (#2321) [@relick]
- InputText: Fixed a bug where ESCAPE would be first captured by the Keyboard Navigation code. (#2321, #787) - InputText: Fixed a bug where ESCAPE would be first captured by the Keyboard Navigation code. (#2321, #787)
- InputText: Fixed redo buffer exhaustion handling (rare) which could corrupt the undo character buffer. (#2333)
The way the redo/undo buffers work would have made it generally unnoticeable to the user.
- Fixed range-version of PushID() and GetID() not honoring the ### operator to restart from the seed value. - Fixed range-version of PushID() and GetID() not honoring the ### operator to restart from the seed value.
- Fixed CloseCurrentPopup() on a child-menu of a modal incorrectly closing the modal. (#2308) - Fixed CloseCurrentPopup() on a child-menu of a modal incorrectly closing the modal. (#2308)
- Tabs: Added ImGuiTabBarFlags_TabListPopupButton flag to show a popup button on manual tab bars. (#261, #351) - Tabs: Added ImGuiTabBarFlags_TabListPopupButton flag to show a popup button on manual tab bars. (#261, #351)

8
imstb_textedit.h
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@ -1132,7 +1132,13 @@ static void stb_textedit_discard_redo(StbUndoState *state)
state->undo_rec[i].char_storage += n; state->undo_rec[i].char_storage += n;
} }
// now move all the redo records towards the end of the buffer; the first one is at 'redo_point' // now move all the redo records towards the end of the buffer; the first one is at 'redo_point'
STB_TEXTEDIT_memmove(state->undo_rec + state->redo_point+1, state->undo_rec + state->redo_point, (size_t) ((STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_point)*sizeof(state->undo_rec[0]))); size_t move_size = (size_t)((STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_point - 1) * sizeof(state->undo_rec[0]));
const char* buf_begin = (char*)state->undo_rec; (void)buf_begin;
const char* buf_end = (char*)state->undo_rec + sizeof(state->undo_rec); (void)buf_end;
IM_ASSERT(((char*)(state->undo_rec + state->redo_point)) >= buf_begin);
IM_ASSERT(((char*)(state->undo_rec + state->redo_point + 1) + move_size) <= buf_end);
STB_TEXTEDIT_memmove(state->undo_rec + state->redo_point+1, state->undo_rec + state->redo_point, move_size);
// now move redo_point to point to the new one // now move redo_point to point to the new one
++state->redo_point; ++state->redo_point;
} }