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/*******************************************************************************************
*
* raylib-extras [ImGui] example - asset browser
*
* This is a more complex ImGui Integration
* It shows how to build windows on top of 2d and 3d views using a render texture
*
* Copyright (c) 2024 Jeffery Myers
*
********************************************************************************************/
#include "imgui_utils.h"
#include "imgui.h"
#include "imgui_internal.h"
namespace ImGuiUtils
{
bool IsSpace(char aCharacter)
{
// all space characters are values 32 or less (space is 32)
// so we can convert them to a bitmask and use a single condition
const int mask = (1 << (' ' - 1)) | (1 << ('\f' - 1)) | (1 << ('\n' - 1)) | (1 << ('\r' - 1)) | (1 << ('\t' - 1)) | (1 << ('\v' - 1));
return (mask & (1 << ((aCharacter && aCharacter <= 32) * (aCharacter - 1)))) != 0;
}
//-------------------------------------------------------------------------------------------------
// Todo: Add support for soft-hyphens when using word boundaries?
//-------------------------------------------------------------------------------------------------
void TextWithEllipsis(const char* string, float aMaxWidth, bool useWordBoundaries, float aSpacing)
{
char const* partStart = string;
char const* partEnd = string;
ImWchar elipsisChar = ImGui::GetFont()->EllipsisChar;
char elipsisText[8];
ImTextStrToUtf8(elipsisText, sizeof(elipsisText), &elipsisChar, (&elipsisChar) + 1);
if (aSpacing < 0.0f) aSpacing = ImGui::GetStyle().ItemSpacing.x;
float const ellipsisWidth = ImGui::CalcTextSize(elipsisText).x + aSpacing;
float width = 0;
bool addElipsis = false;
while (*partStart != 0 )
{
// Add space to next segment
while (IsSpace(*partEnd))
partEnd++;
if (useWordBoundaries)
{
// get next 'word' by looking for space after non-space
while (*partEnd != 0 && !IsSpace(*partEnd))
++partEnd;
}
else
{
if (*partEnd != 0)
++partEnd;
}
ImVec2 const wordSize = ImGui::CalcTextSize(partStart, partEnd);
// Clearly we have space for this word so just add it
if (wordSize.x + width + ellipsisWidth < aMaxWidth)
{
width += wordSize.x;
partStart = partEnd;
}
// If we're just at the end of the word and we just fit then we can commit here
else if (*partEnd == 0 && wordSize.x + width < aMaxWidth)
{
width += wordSize.x;
partStart = partEnd;
}
// we're done so add elipsis where the current segment starts
else
{
addElipsis = true;
break;
}
}
ImGui::TextUnformatted(string, partStart);
if (addElipsis)
{
ImGui::SameLine(0.0f, aSpacing);
ImGui::TextUnformatted(elipsisText);
}
}
}
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