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Fix 83efdcec from overflowing buffer + make it a single undo records + comments (#3008)

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This commit is contained in:
omar 2020-02-03 16:37:54 +01:00
parent 83efdcec8d
commit bdbb2b21f5
2 changed files with 25 additions and 18 deletions
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3
docs/CHANGELOG.txt
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@ -76,7 +76,8 @@ Other Changes:
those improvements in 1.73 makes them unnecessary. (#2722, #2770). [@rokups]
- ColorEdit: "Copy As" context-menu tool shows hex values with a '#' prefix instead of '0x'.
- ColorEdit: "Copy As" content-menu tool shows hex values both with/without alpha when available.
- InputText: Fix crash when executing undo action after clearing input with ESC (#3008). [@rokups]
- InputText: Fix corruption or crash when executing undo after clearing input with ESC, as a
byproduct we are allowing to later undo the revert with a CTRL+Z. (#3008).
- MenuBar: Fix minor clipping issue where occasionally a menu text can overlap the right-most border.
- Window: Fix SetNextWindowBgAlpha(1.0f) failing to override alpha component. (#3007) [@Albog]
- Window: When testing for the presence of the ImGuiWindowFlags_NoBringToFrontOnFocus flag we

40
imgui_widgets.cpp
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@ -3271,8 +3271,25 @@ static bool STB_TEXTEDIT_INSERTCHARS(STB_TEXTEDIT_STRING* obj, int pos, const Im
#define STB_TEXTEDIT_IMPLEMENTATION
#include "imstb_textedit.h"
// stb_textedit internally allows for a single undo record to do addition and deletion, but somehow, calling
// the stb_textedit_paste() function creates two separate records, so we perform it manually. (FIXME: Report to nothings/stb?)
static void stb_textedit_replace(STB_TEXTEDIT_STRING* str, STB_TexteditState* state, const STB_TEXTEDIT_CHARTYPE* text, int text_len)
{
stb_text_makeundo_replace(str, state, 0, str->CurLenW, text_len);
ImStb::STB_TEXTEDIT_DELETECHARS(str, 0, str->CurLenW);
if (text_len <= 0)
return;
if (ImStb::STB_TEXTEDIT_INSERTCHARS(str, 0, text, text_len))
{
state->cursor = text_len;
state->has_preferred_x = 0;
return;
}
IM_ASSERT(0); // Failed to insert character, normally shouldn't happen because of how we currently use stb_textedit_replace()
}
} // namespace ImStb
void ImGuiInputTextState::OnKeyPressed(int key)
{
stb_textedit_key(this, &Stb, key);
@ -3826,27 +3843,16 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
// Restore initial value. Only return true if restoring to the initial value changes the current buffer contents.
if (!is_readonly && strcmp(buf, state->InitialTextA.Data) != 0)
{
// Push records into the undo stack so we can CTRL+Z the revert operation itself
apply_new_text = state->InitialTextA.Data;
apply_new_text_length = state->InitialTextA.Size - 1;
// Select all text
state->OnKeyPressed(STB_TEXTEDIT_K_TEXTSTART);
state->OnKeyPressed(STB_TEXTEDIT_K_TEXTEND | STB_TEXTEDIT_K_SHIFT);
// Paste converted text or empty buffer
if (state->InitialTextA.size() > 1)
ImVector<ImWchar> w_text;
if (apply_new_text_length > 0)
{
ImVector<ImWchar> w_text;
const char* apply_new_text_end = apply_new_text + apply_new_text_length + 1;
w_text.resize(ImTextCountCharsFromUtf8(apply_new_text, apply_new_text_end));
ImTextStrFromUtf8(w_text.Data, w_text.Size, apply_new_text, apply_new_text_end);
ImStb::stb_textedit_paste(state, &state->Stb, w_text.Data, w_text.Size);
}
else
{
ImWchar empty = 0;
ImStb::stb_textedit_paste(state, &state->Stb, &empty, 0);
w_text.resize(ImTextCountCharsFromUtf8(apply_new_text, apply_new_text + apply_new_text_length) + 1);
ImTextStrFromUtf8(w_text.Data, w_text.Size, apply_new_text, apply_new_text + apply_new_text_length);
}
stb_textedit_replace(state, &state->Stb, w_text.Data, (apply_new_text_length > 0) ? (w_text.Size - 1) : 0);
}
}