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Internal: InputText: Made clipboard copy/cut use its own temporary buffer (like paste) so we can guarantee that TempBuffer if not altered and can be preserved. Renamed TempBufferA to TextA to celebrate this.

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This commit is contained in:
omar 2019-02-21 17:33:57 +01:00
parent 81a8730022
commit 332f8f2462
2 changed files with 18 additions and 16 deletions
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6
imgui_internal.h
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@ -561,10 +561,10 @@ struct IMGUI_API ImGuiMenuColumns
struct IMGUI_API ImGuiInputTextState struct IMGUI_API ImGuiInputTextState
{ {
ImGuiID ID; // widget id owning the text state ImGuiID ID; // widget id owning the text state
int CurLenW, CurLenA; // we need to maintain our buffer length in both UTF-8 and wchar format.
ImVector<ImWchar> TextW; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer. ImVector<ImWchar> TextW; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
ImVector<char> TextA; // temporary UTF8 buffer for callbacks and other operations. this is not updated in every code-path! size=capacity.
ImVector<char> InitialTextA; // backup of end-user buffer at the time of focus (in UTF-8, unaltered) ImVector<char> InitialTextA; // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
ImVector<char> TempBufferA; // temporary buffer for callbacks and other operations. size=capacity.
int CurLenA, CurLenW; // we need to maintain our buffer length in both UTF-8 and wchar format.
int BufCapacityA; // end-user buffer capacity int BufCapacityA; // end-user buffer capacity
float ScrollX; // horizontal scrolling/offset float ScrollX; // horizontal scrolling/offset
ImStb::STB_TexteditState Stb; // state for stb_textedit.h ImStb::STB_TexteditState Stb; // state for stb_textedit.h
@ -578,7 +578,7 @@ struct IMGUI_API ImGuiInputTextState
void* UserCallbackData; void* UserCallbackData;
ImGuiInputTextState() { memset(this, 0, sizeof(*this)); } ImGuiInputTextState() { memset(this, 0, sizeof(*this)); }
void ClearFreeMemory() { TextW.clear(); InitialTextA.clear(); TempBufferA.clear(); } void ClearFreeMemory() { TextW.clear(); TextA.clear(); InitialTextA.clear(); }
void CursorAnimReset() { CursorAnim = -0.30f; } // After a user-input the cursor stays on for a while without blinking void CursorAnimReset() { CursorAnim = -0.30f; } // After a user-input the cursor stays on for a while without blinking
void CursorClamp() { Stb.cursor = ImMin(Stb.cursor, CurLenW); Stb.select_start = ImMin(Stb.select_start, CurLenW); Stb.select_end = ImMin(Stb.select_end, CurLenW); } void CursorClamp() { Stb.cursor = ImMin(Stb.cursor, CurLenW); Stb.select_start = ImMin(Stb.select_start, CurLenW); Stb.select_end = ImMin(Stb.select_end, CurLenW); }
bool HasSelection() const { return Stb.select_start != Stb.select_end; } bool HasSelection() const { return Stb.select_start != Stb.select_end; }

28
imgui_widgets.cpp
View File

@ -3045,10 +3045,10 @@ void ImGuiInputTextCallbackData::InsertChars(int pos, const char* new_text, cons
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
ImGuiInputTextState* edit_state = &g.InputTextState; ImGuiInputTextState* edit_state = &g.InputTextState;
IM_ASSERT(edit_state->ID != 0 && g.ActiveId == edit_state->ID); IM_ASSERT(edit_state->ID != 0 && g.ActiveId == edit_state->ID);
IM_ASSERT(Buf == edit_state->TempBufferA.Data); IM_ASSERT(Buf == edit_state->TextA.Data);
int new_buf_size = BufTextLen + ImClamp(new_text_len * 4, 32, ImMax(256, new_text_len)) + 1; int new_buf_size = BufTextLen + ImClamp(new_text_len * 4, 32, ImMax(256, new_text_len)) + 1;
edit_state->TempBufferA.reserve(new_buf_size + 1); edit_state->TextA.reserve(new_buf_size + 1);
Buf = edit_state->TempBufferA.Data; Buf = edit_state->TextA.Data;
BufSize = edit_state->BufCapacityA = new_buf_size; BufSize = edit_state->BufCapacityA = new_buf_size;
} }
@ -3444,9 +3444,11 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
{ {
const int ib = state->HasSelection() ? ImMin(state->Stb.select_start, state->Stb.select_end) : 0; const int ib = state->HasSelection() ? ImMin(state->Stb.select_start, state->Stb.select_end) : 0;
const int ie = state->HasSelection() ? ImMax(state->Stb.select_start, state->Stb.select_end) : state->CurLenW; const int ie = state->HasSelection() ? ImMax(state->Stb.select_start, state->Stb.select_end) : state->CurLenW;
state->TempBufferA.resize((ie-ib) * 4 + 1); const int clipboard_data_len = ImTextCountUtf8BytesFromStr(state->TextW.Data + ib, state->TextW.Data + ie) + 1;
ImTextStrToUtf8(state->TempBufferA.Data, state->TempBufferA.Size, state->TextW.Data+ib, state->TextW.Data+ie); char* clipboard_data = (char*)MemAlloc(clipboard_data_len * sizeof(char));
SetClipboardText(state->TempBufferA.Data); ImTextStrToUtf8(clipboard_data, clipboard_data_len, state->TextW.Data + ib, state->TextW.Data + ie);
SetClipboardText(clipboard_data);
MemFree(clipboard_data);
} }
if (is_cut) if (is_cut)
{ {
@ -3512,8 +3514,8 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
// FIXME-OPT: CPU waste to do this every time the widget is active, should mark dirty state from the stb_textedit callbacks. // FIXME-OPT: CPU waste to do this every time the widget is active, should mark dirty state from the stb_textedit callbacks.
if (!is_readonly) if (!is_readonly)
{ {
state->TempBufferA.resize(state->TextW.Size * 4 + 1); state->TextA.resize(state->TextW.Size * 4 + 1);
ImTextStrToUtf8(state->TempBufferA.Data, state->TempBufferA.Size, state->TextW.Data, NULL); ImTextStrToUtf8(state->TextA.Data, state->TextA.Size, state->TextW.Data, NULL);
} }
// User callback // User callback
@ -3551,7 +3553,7 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
callback_data.UserData = callback_user_data; callback_data.UserData = callback_user_data;
callback_data.EventKey = event_key; callback_data.EventKey = event_key;
callback_data.Buf = state->TempBufferA.Data; callback_data.Buf = state->TextA.Data;
callback_data.BufTextLen = state->CurLenA; callback_data.BufTextLen = state->CurLenA;
callback_data.BufSize = state->BufCapacityA; callback_data.BufSize = state->BufCapacityA;
callback_data.BufDirty = false; callback_data.BufDirty = false;
@ -3566,7 +3568,7 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
callback(&callback_data); callback(&callback_data);
// Read back what user may have modified // Read back what user may have modified
IM_ASSERT(callback_data.Buf == state->TempBufferA.Data); // Invalid to modify those fields IM_ASSERT(callback_data.Buf == state->TextA.Data); // Invalid to modify those fields
IM_ASSERT(callback_data.BufSize == state->BufCapacityA); IM_ASSERT(callback_data.BufSize == state->BufCapacityA);
IM_ASSERT(callback_data.Flags == flags); 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.CursorPos != utf8_cursor_pos) { state->Stb.cursor = ImTextCountCharsFromUtf8(callback_data.Buf, callback_data.Buf + callback_data.CursorPos); state->CursorFollow = true; }
@ -3585,9 +3587,9 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
} }
// Will copy result string if modified // Will copy result string if modified
if (!is_readonly && strcmp(state->TempBufferA.Data, buf) != 0) if (!is_readonly && strcmp(state->TextA.Data, buf) != 0)
{ {
apply_new_text = state->TempBufferA.Data; apply_new_text = state->TextA.Data;
apply_new_text_length = state->CurLenA; apply_new_text_length = state->CurLenA;
} }
} }
@ -3633,7 +3635,7 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
const int buf_display_max_length = 2 * 1024 * 1024; const int buf_display_max_length = 2 * 1024 * 1024;
// Select which buffer we are going to display. We set buf to NULL to prevent accidental usage from now on. // Select which buffer we are going to display. We set buf to NULL to prevent accidental usage from now on.
const char* buf_display = (state != NULL && !is_readonly) ? state->TempBufferA.Data : buf; const char* buf_display = (state != NULL && !is_readonly) ? state->TextA.Data : buf;
IM_ASSERT(buf_display); IM_ASSERT(buf_display);
buf = NULL; buf = NULL;