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Text: Fix clipping of single-character "..." ellipsis when font is scaled. (#2775

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ocornut 2023-01-11 15:56:33 +01:00
parent 482ac70a0b
commit 8801f02949
2 changed files with 8 additions and 4 deletions
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4
docs/CHANGELOG.txt
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@ -37,6 +37,10 @@ HOW TO UPDATE?
All changes:
- Text: Fix clipping of single-character "..." ellipsis (U+2026 or U+0085) when font
is scaled. Scaling wasn't taken into account, leading to ellipsis character straying
slightly out of its expected boundaries. (#2775)
-----------------------------------------------------------------------
VERSION 1.89.2 (Released 2023-01-05)

8
imgui.cpp
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@ -3236,7 +3236,6 @@ void ImGui::RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, cons
LogRenderedText(&pos_min, text, text_display_end);
}
// Another overly complex function until we reorganize everything into a nice all-in-one helper.
// This is made more complex because we have dissociated the layout rectangle (pos_min..pos_max) which define _where_ the ellipsis is, from actual clipping of text and limit of the ellipsis display.
// This is because in the context of tabs we selectively hide part of the text when the Close Button appears, but we don't want the ellipsis to move.
@ -3260,6 +3259,7 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
const ImFont* font = draw_list->_Data->Font;
const float font_size = draw_list->_Data->FontSize;
const float font_scale = font_size / font->FontSize;
const char* text_end_ellipsis = NULL;
ImWchar ellipsis_char = font->EllipsisChar;
@ -3271,14 +3271,14 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
}
const ImFontGlyph* glyph = font->FindGlyph(ellipsis_char);
float ellipsis_glyph_width = glyph->X1; // Width of the glyph with no padding on either side
float ellipsis_glyph_width = glyph->X1 * font_scale; // Width of the glyph with no padding on either side
float ellipsis_total_width = ellipsis_glyph_width; // Full width of entire ellipsis
if (ellipsis_char_count > 1)
{
// Full ellipsis size without free spacing after it.
const float spacing_between_dots = 1.0f * (draw_list->_Data->FontSize / font->FontSize);
ellipsis_glyph_width = glyph->X1 - glyph->X0 + spacing_between_dots;
const float spacing_between_dots = 1.0f * font_scale;
ellipsis_glyph_width = (glyph->X1 - glyph->X0) * font_scale + spacing_between_dots;
ellipsis_total_width = ellipsis_glyph_width * (float)ellipsis_char_count - spacing_between_dots;
}