Method CalcTextSizeA

KBotExt/imgui/imgui_draw.cpp:3518–3594

}

ImVec2 ImFont::CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end, const char** remaining) const
{
	if (!text_end)
		text_end = text_begin + strlen(text_begin); // FIXME-OPT: Need to avoid this.

	const float line_height = size;
	const float scale = size / FontSize;

	ImVec2 text_size = ImVec2(0, 0);
	float line_width = 0.0f;

	const bool word_wrap_enabled = (wrap_width > 0.0f);
	const char* word_wrap_eol = NULL;

	const char* s = text_begin;
	while (s < text_end)
	{
		if (word_wrap_enabled)
		{
			// Calculate how far we can render. Requires two passes on the string data but keeps the code simple and not intrusive for what's essentially an uncommon feature.
			if (!word_wrap_eol)
				word_wrap_eol = CalcWordWrapPositionA(scale, s, text_end, wrap_width - line_width);

			if (s >= word_wrap_eol)
			{
				if (text_size.x < line_width)
					text_size.x = line_width;
				text_size.y += line_height;
				line_width = 0.0f;
				word_wrap_eol = NULL;
				s = CalcWordWrapNextLineStartA(s, text_end); // Wrapping skips upcoming blanks
				continue;
			}
		}

		// Decode and advance source
		const char* prev_s = s;
		unsigned int c = (unsigned int)*s;
		if (c < 0x80)
			s += 1;
		else
			s += ImTextCharFromUtf8(&c, s, text_end);

		if (c < 32)
		{
			if (c == '\n')
			{
				text_size.x = ImMax(text_size.x, line_width);
				text_size.y += line_height;
				line_width = 0.0f;
				continue;
			}
			if (c == '\r')
				continue;
		}

		const float char_width = ((int)c < IndexAdvanceX.Size ? IndexAdvanceX.Data[c] : FallbackAdvanceX) * scale;
		if (line_width + char_width >= max_width)