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Fix: Editbox behaved improperly with RTL languages. (#12746)

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Text in the editbox was always left-aligned and did not scroll with the caret position.
This commit is contained in:
Peter Nelson 2024-06-04 23:05:51 +01:00 committed by GitHub
parent 579ce8eae0
commit 57186d4650
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GPG Key ID: B5690EEEBB952194
1 changed files with 37 additions and 16 deletions
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53
src/misc_gui.cpp
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@ -780,6 +780,25 @@ static int GetCaretWidth()
return GetCharacterWidth(FS_NORMAL, '_');
}
/**
* Reposition edit text box rect based on textbuf length can caret position.
* @param r Initial rect of edit text box.
* @param tb The Textbuf being processed.
* @return Updated rect.
*/
static Rect ScrollEditBoxTextRect(Rect r, const Textbuf &tb)
{
const int linewidth = tb.pixels + GetCaretWidth();
const int boxwidth = r.Width();
if (linewidth <= boxwidth) return r;
/* Extend to cover whole string. This is left-aligned, adjusted by caret position. */
r = r.WithWidth(linewidth, false);
/* Slide so that the caret is at the centre unless limited by bounds of the line, i.e. near either end. */
return r.Translate(-std::clamp(tb.caretxoffs - (boxwidth / 2), 0, linewidth - boxwidth), 0);
}
void QueryString::DrawEditBox(const Window *w, WidgetID wid) const
{
const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
@ -805,24 +824,29 @@ void QueryString::DrawEditBox(const Window *w, WidgetID wid) const
/* Limit the drawing of the string inside the widget boundaries */
DrawPixelInfo dpi;
if (!FillDrawPixelInfo(&dpi, fr)) return;
/* Keep coordinates relative to the window. */
dpi.left += fr.left;
dpi.top += fr.top;
AutoRestoreBackup dpi_backup(_cur_dpi, &dpi);
/* We will take the current widget length as maximum width, with a small
* space reserved at the end for the caret to show */
const Textbuf *tb = &this->text;
int delta = std::min(0, (fr.right - fr.left) - tb->pixels - GetCaretWidth());
if (tb->caretxoffs + delta < 0) delta = -tb->caretxoffs;
fr = ScrollEditBoxTextRect(fr, *tb);
/* If we have a marked area, draw a background highlight. */
if (tb->marklength != 0) GfxFillRect(delta + tb->markxoffs, 0, delta + tb->markxoffs + tb->marklength - 1, fr.bottom - fr.top, PC_GREY);
if (tb->marklength != 0) GfxFillRect(fr.left + tb->markxoffs, fr.top, fr.left + tb->markxoffs + tb->marklength - 1, fr.bottom, PC_GREY);
DrawString(delta, tb->pixels, 0, tb->buf, TC_YELLOW);
DrawString(fr.left, fr.right, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), tb->buf, TC_YELLOW);
bool focussed = w->IsWidgetGloballyFocused(wid) || IsOSKOpenedFor(w, wid);
if (focussed && tb->caret) {
int caret_width = GetStringBoundingBox("_").width;
DrawString(tb->caretxoffs + delta, tb->caretxoffs + delta + caret_width, 0, "_", TC_WHITE);
int caret_width = GetCaretWidth();
if (rtl) {
DrawString(fr.right - tb->pixels + tb->caretxoffs - caret_width, fr.right - tb->pixels + tb->caretxoffs, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
} else {
DrawString(fr.left + tb->caretxoffs, fr.left + tb->caretxoffs + caret_width, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
}
}
}
@ -846,10 +870,9 @@ Point QueryString::GetCaretPosition(const Window *w, WidgetID wid) const
/* Clamp caret position to be inside out current width. */
const Textbuf *tb = &this->text;
int delta = std::min(0, (r.right - r.left) - tb->pixels - GetCaretWidth());
if (tb->caretxoffs + delta < 0) delta = -tb->caretxoffs;
r = ScrollEditBoxTextRect(r, *tb);
Point pt = {r.left + tb->caretxoffs + delta, r.top};
Point pt = {r.left + tb->caretxoffs, r.top};
return pt;
}
@ -875,14 +898,13 @@ Rect QueryString::GetBoundingRect(const Window *w, WidgetID wid, const char *fro
/* Clamp caret position to be inside our current width. */
const Textbuf *tb = &this->text;
int delta = std::min(0, r.Width() - tb->pixels - GetCaretWidth());
if (tb->caretxoffs + delta < 0) delta = -tb->caretxoffs;
r = ScrollEditBoxTextRect(r, *tb);
/* Get location of first and last character. */
Point p1 = GetCharPosInString(tb->buf, from, FS_NORMAL);
Point p2 = from != to ? GetCharPosInString(tb->buf, to, FS_NORMAL) : p1;
return { Clamp(r.left + p1.x + delta, r.left, r.right), r.top, Clamp(r.left + p2.x + delta, r.left, r.right), r.bottom };
return { Clamp(r.left + p1.x, r.left, r.right), r.top, Clamp(r.left + p2.x, r.left, r.right), r.bottom };
}
/**
@ -908,10 +930,9 @@ ptrdiff_t QueryString::GetCharAtPosition(const Window *w, WidgetID wid, const Po
/* Clamp caret position to be inside our current width. */
const Textbuf *tb = &this->text;
int delta = std::min(0, r.Width() - tb->pixels - GetCaretWidth());
if (tb->caretxoffs + delta < 0) delta = -tb->caretxoffs;
r = ScrollEditBoxTextRect(r, *tb);
return ::GetCharAtPosition(tb->buf, pt.x - delta - r.left);
return ::GetCharAtPosition(tb->buf, pt.x - r.left);
}
void QueryString::ClickEditBox(Window *w, Point pt, WidgetID wid, int click_count, bool focus_changed)