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InputText: Word-Wrap: added custom implementation for Home/End that is word-wrap friendly. (#3237, #952, #1062, #7363)

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ocornut
2025-08-29 18:18:18 +02:00
parent 985723ed94
commit 16415aa39f
1 changed files with 69 additions and 0 deletions
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69
imgui_widgets.cpp
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@@ -4101,6 +4101,75 @@ static int STB_TEXTEDIT_MOVEWORDRIGHT_IMPL(ImGuiInputTextState* obj, int idx)
#define STB_TEXTEDIT_MOVEWORDLEFT STB_TEXTEDIT_MOVEWORDLEFT_IMPL // They need to be #define for stb_textedit.h
#define STB_TEXTEDIT_MOVEWORDRIGHT STB_TEXTEDIT_MOVEWORDRIGHT_IMPL
// Reimplementation of stb_textedit_move_line_start()/stb_textedit_move_line_end() which supports word-wrapping.
static int STB_TEXTEDIT_MOVELINESTART_IMPL(ImGuiInputTextState* obj, ImStb::STB_TexteditState* state, int cursor)
{
if (state->single_line)
return 0;
if (obj->WrapWidth > 0.0f)
{
ImGuiContext& g = *obj->Ctx;
const char* p_cursor = obj->TextSrc + cursor;
const char* p_bol = ImStrbol(p_cursor, obj->TextSrc);
const char* p = p_bol;
const char* text_end = obj->TextSrc + obj->TextLen; // End of line would be enough
while (p >= p_bol)
{
const char* p_eol = ImFontCalcWordWrapPositionEx(g.Font, g.FontSize, p, text_end, obj->WrapWidth, ImDrawTextFlags_WrapKeepBlanks);
if (p == p_cursor) // If we are already on a visible beginning-of-line, return real beginning-of-line (would be same as regular handler below)
return (int)(p_bol - obj->TextSrc);
if (p_eol == p_cursor && obj->TextA[cursor] != '\n' && obj->LastMoveDirectionLR == ImGuiDir_Left)
return (int)(p_bol - obj->TextSrc);
if (p_eol >= p_cursor)
return (int)(p - obj->TextSrc);
p = (*p_eol == '\n') ? p_eol + 1 : p_eol;
}
}
// Regular handler, same as stb_textedit_move_line_start()
while (cursor > 0)
{
int prev_cursor = IMSTB_TEXTEDIT_GETPREVCHARINDEX(obj, cursor);
if (STB_TEXTEDIT_GETCHAR(obj, prev_cursor) == STB_TEXTEDIT_NEWLINE)
break;
cursor = prev_cursor;
}
return cursor;
}
static int STB_TEXTEDIT_MOVELINEEND_IMPL(ImGuiInputTextState* obj, ImStb::STB_TexteditState* state, int cursor)
{
int n = STB_TEXTEDIT_STRINGLEN(obj);
if (state->single_line)
return n;
if (obj->WrapWidth > 0.0f)
{
ImGuiContext& g = *obj->Ctx;
const char* p_cursor = obj->TextSrc + cursor;
const char* p = ImStrbol(p_cursor, obj->TextSrc);
const char* text_end = obj->TextSrc + obj->TextLen; // End of line would be enough
while (p < text_end)
{
const char* p_eol = ImFontCalcWordWrapPositionEx(g.Font, g.FontSize, p, text_end, obj->WrapWidth, ImDrawTextFlags_WrapKeepBlanks);
cursor = (int)(p_eol - obj->TextSrc);
if (p_eol == p_cursor && obj->LastMoveDirectionLR != ImGuiDir_Left) // If we are already on a visible end-of-line, switch to regular handle
break;
if (p_eol > p_cursor)
return cursor;
p = (*p_eol == '\n') ? p_eol + 1 : p_eol;
}
}
// Regular handler, same as stb_textedit_move_line_end()
while (cursor < n && STB_TEXTEDIT_GETCHAR(obj, cursor) != STB_TEXTEDIT_NEWLINE)
cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, cursor);
return cursor;
}
#define STB_TEXTEDIT_MOVELINESTART STB_TEXTEDIT_MOVELINESTART_IMPL
#define STB_TEXTEDIT_MOVELINEEND STB_TEXTEDIT_MOVELINEEND_IMPL
static void STB_TEXTEDIT_DELETECHARS(ImGuiInputTextState* obj, int pos, int n)
{
// Offset remaining text (+ copy zero terminator)