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InputText: Fixed updating cursor/selection position when a callback alters the buffer in a way where the byte count is unchanged but the decoded character count changes. (#3587)

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顾起威 2020-11-11 11:35:47 +01:00 committed by ocornut
parent 5789e69a62
commit 2785ac0ee3
2 changed files with 8 additions and 5 deletions
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2
docs/CHANGELOG.txt
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@ -64,6 +64,8 @@ Other Changes:
- Drag and Drop: Fix drag and drop to tie same-size drop targets by choosen the later one. Fixes dragging
into a full-window-sized dockspace inside a zero-padded window. (#3519, #2717) [@Black-Cat]
- Checkbox: Added CheckboxFlags() helper with int* type.
- InputText: Fixed updating cursor/selection position when a callback altered the buffer in a way
where the byte count is unchanged but the decoded character count changes. (#3587) [@gqw]
- Metrics: Fixed mishandling of ImDrawCmd::VtxOffset in wireframe mesh renderer.
- Misc: Replaced UTF-8 decoder by branchless one by Christopher Wellons (30~40% faster). [@rokups]
Super minor fix handling incomplete UTF-8 contents: if input does not contain enough bytes, decoder

9
imgui_widgets.cpp
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@ -4273,10 +4273,11 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
IM_ASSERT(callback_data.Buf == state->TextA.Data); // Invalid to modify those fields
IM_ASSERT(callback_data.BufSize == state->BufCapacityA);
IM_ASSERT(callback_data.Flags == flags);
if (callback_data.CursorPos != utf8_cursor_pos) { state->Stb.cursor = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.CursorPos); state->CursorFollow = true; }
if (callback_data.SelectionStart != utf8_selection_start) { state->Stb.select_start = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.SelectionStart); }
if (callback_data.SelectionEnd != utf8_selection_end) { state->Stb.select_end = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.SelectionEnd); }
if (callback_data.BufDirty)
const bool buf_dirty = callback_data.BufDirty;
if (callback_data.CursorPos != utf8_cursor_pos || buf_dirty) { state->Stb.cursor = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.CursorPos); state->CursorFollow = true; }
if (callback_data.SelectionStart != utf8_selection_start || buf_dirty) { state->Stb.select_start = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.SelectionStart); }
if (callback_data.SelectionEnd != utf8_selection_end || buf_dirty) { state->Stb.select_end = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.SelectionEnd); }
if (buf_dirty)
{
IM_ASSERT(callback_data.BufTextLen == (int)strlen(callback_data.Buf)); // You need to maintain BufTextLen if you change the text!
if (callback_data.BufTextLen > backup_current_text_length && is_resizable)