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Font: Narrow ellipsis: various minor stylistic tweaks (#2775)

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This commit is contained in:
omar
2019-09-17 10:00:28 +02:00
parent 45405f0dc9
commit 57623c15dd
6 changed files with 49 additions and 55 deletions
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61
imgui.cpp
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@ -2506,38 +2506,32 @@ 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 char* text_end_ellipsis = NULL;
const ImFontGlyph* glyph;
int ellipsis_char_num = 1;
ImWchar ellipsis_codepoint = font->EllipsisCodePoint;
if (ellipsis_codepoint != (ImWchar)-1)
glyph = font->FindGlyph(ellipsis_codepoint);
else
ImWchar ellipsis_char = font->EllipsisChar;
int ellipsis_char_count = 1;
if (ellipsis_char == (ImWchar)-1)
{
ellipsis_codepoint = (ImWchar)'.';
glyph = font->FindGlyph(ellipsis_codepoint);
ellipsis_char_num = 3;
ellipsis_char = (ImWchar)'.';
ellipsis_char_count = 3;
}
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_width = ellipsis_glyph_width; // Full width of entire ellipsis
float push_left = 1.f;
float ellipsis_glyph_width = glyph->X1; // Width of the glyph with no padding on either side
float ellipsis_total_width = ellipsis_glyph_width; // Full width of entire ellipsis
float push_left = 1.0f;
if (ellipsis_char_num > 1)
if (ellipsis_char_count > 1)
{
const float spacing_between_dots = 1.f * (draw_list->_Data->FontSize / font->FontSize);
ellipsis_glyph_width = glyph->X1 - glyph->X0 + spacing_between_dots;
// Full ellipsis size without free spacing after it.
ellipsis_width = ellipsis_glyph_width * (float)ellipsis_char_num - spacing_between_dots;
if (glyph->X0 > 1.f)
{
// Pushing ellipsis to the left will be accomplished by rendering the dot (X0).
push_left = 0.f;
}
const float spacing_between_dots = 1.0f * (draw_list->_Data->FontSize / font->FontSize);
ellipsis_glyph_width = glyph->X1 - glyph->X0 + spacing_between_dots;
ellipsis_total_width = ellipsis_glyph_width * (float)ellipsis_char_count - spacing_between_dots;
if (glyph->X0 > 1.0f)
push_left = 0.0f; // Pushing ellipsis to the left will be accomplished by rendering the dot (X0).
}
float text_width = ImMax((pos_max.x - ellipsis_width) - pos_min.x, 1.0f);
float text_size_clipped_x = font->CalcTextSizeA(font_size, text_width, 0.0f, text, text_end_full, &text_end_ellipsis).x;
float text_avail_width = ImMax((pos_max.x - ellipsis_total_width) - pos_min.x, 1.0f);
float text_size_clipped_x = font->CalcTextSizeA(font_size, text_avail_width, 0.0f, text, text_end_full, &text_end_ellipsis).x;
if (text == text_end_ellipsis && text_end_ellipsis < text_end_full)
{
@ -2547,7 +2541,7 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
}
while (text_end_ellipsis > text && ImCharIsBlankA(text_end_ellipsis[-1]))
{
// Trim trailing space before ellipsis
// Trim trailing space before ellipsis (FIXME: Supporting non-ascii blanks would be nice, for this we need a function to backtrack in UTF-8 text)
text_end_ellipsis--;
text_size_clipped_x -= font->CalcTextSizeA(font_size, FLT_MAX, 0.0f, text_end_ellipsis, text_end_ellipsis + 1).x; // Ascii blanks are always 1 byte
}
@ -2560,16 +2554,15 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
// ||||
// \ \__ extra_spacing when two characters got hidden
// \___ extra_spacing when one character got hidden
unsigned c = 0;
float extra_spacing = 0;
unsigned int c = 0;
float extra_spacing = 0.0f;
const char* text_end_ellipsis_prev = text_end_ellipsis;
text_end_ellipsis += ImTextCharFromUtf8(&c, text_end_ellipsis, text_end_full);
if (c && !ImCharIsBlankW(c))
{
const ImFontGlyph* hidden_glyph = font->FindGlyph(c);
// Free space after first invisible glyph
const ImFontGlyph* hidden_glyph = font->FindGlyph((ImWchar)c);
extra_spacing = hidden_glyph->AdvanceX - hidden_glyph->X1;
c = 0;
text_end_ellipsis += ImTextCharFromUtf8(&c, text_end_ellipsis, text_end_full);
if (c && !ImCharIsBlankW(c))
{
@ -2587,11 +2580,11 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
if (extra_spacing > 0)
{
// Repeat calculation hoping that we will get extra character visible
text_width += extra_spacing;
text_avail_width += extra_spacing;
// Text length calculation is essentially an optimized version of this:
// text_size_clipped_x = font->CalcTextSizeA(font_size, text_width, 0.0f, text, text_end_full, &text_end_ellipsis).x;
// It avoids calculating entire width of the string.
text_size_clipped_x += font->CalcTextSizeA(font_size, text_width - text_size_clipped_x, 0.0f, text_end_ellipsis_prev, text_end_full, &text_end_ellipsis).x;
text_size_clipped_x += font->CalcTextSizeA(font_size, text_avail_width - text_size_clipped_x, 0.0f, text_end_ellipsis_prev, text_end_full, &text_end_ellipsis).x;
}
else
text_end_ellipsis = text_end_ellipsis_prev;
@ -2603,14 +2596,12 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
// ellipsis character contained in the font. If we render ellipsis manually space is already adequate and extra
// spacing is not needed.
float ellipsis_x = pos_min.x + text_size_clipped_x + push_left;
if (ellipsis_x + ellipsis_width - push_left <= ellipsis_max_x)
{
for (int i = 0; i < ellipsis_char_num; i++)
if (ellipsis_x + ellipsis_total_width - push_left <= ellipsis_max_x)
for (int i = 0; i < ellipsis_char_count; i++)
{
font->RenderChar(draw_list, font_size, ImVec2(ellipsis_x, pos_min.y), GetColorU32(ImGuiCol_Text), ellipsis_codepoint);
font->RenderChar(draw_list, font_size, ImVec2(ellipsis_x, pos_min.y), GetColorU32(ImGuiCol_Text), ellipsis_char);
ellipsis_x += ellipsis_glyph_width;
}
}
}
else
{