Fix `GuiDrawText()` sometimes drawing out of bounds (#367)

* Fix `GuiDrawText()` drawing out of bounds when icon is used

* Fix glyphWidth not being set when text wrap is off

* Fixed text sometimes drawing out of bounds when middle or right aligned

This changes textSizeX to have a maximum equal to the bounds width,
preventing the text x-position being set left of the bounds.

textSizeX is unchanged if only an icon is provided, so that lone icons
can always be middle aligned.

* Show ellipsis at the end of text when it gets cut off

src/raygui.h

@@ -4802,6 +4802,7 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
         // Get text position depending on alignment and iconId
         //---------------------------------------------------------------------------------
         Vector2 textBoundsPosition = { textBounds.x, textBounds.y };
+        float textBoundsWidthOffset = 0.0f;
 
         // NOTE: We get text size after icon has been processed
         // WARNING: GetTextWidth() also processes text icon to get width! -> Really needed?
@@ -4827,6 +4828,8 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
             default: break;
         }
 
+        if (textSizeX > textBounds.width && (lines[i] != NULL) && (lines[i][0] != '\0')) textBoundsPosition.x = textBounds.x;
+
         switch (alignmentVertical)
         {
             // Only valid in case of wordWrap = 0;
@@ -4850,6 +4853,7 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
             // NOTE: We consider icon height, probably different than text size
             GuiDrawIcon(iconId, (int)textBoundsPosition.x, (int)(textBounds.y + textBounds.height/2 - RAYGUI_ICON_SIZE*guiIconScale/2 + TEXT_VALIGN_PIXEL_OFFSET(textBounds.height)), guiIconScale, tint);
             textBoundsPosition.x += (RAYGUI_ICON_SIZE*guiIconScale + ICON_TEXT_PADDING);
+            textBoundsWidthOffset = (RAYGUI_ICON_SIZE*guiIconScale + ICON_TEXT_PADDING);
         }
 #endif
         // Get size in bytes of text,
@@ -4864,6 +4868,9 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
         int textOffsetY = 0;
         float textOffsetX = 0.0f;
         float glyphWidth = 0;
+
+        float ellipsisWidth = GetTextWidth("...");
+        bool overflowReached = false;
         for (int c = 0, codepointSize = 0; c < lineSize; c += codepointSize)
         {
             int codepoint = GetCodepointNext(&lines[i][c], &codepointSize);
@@ -4873,16 +4880,16 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
             // but we need to draw all of the bad bytes using the '?' symbol moving one byte
             if (codepoint == 0x3f) codepointSize = 1; // TODO: Review not recognized codepoints size
 
+            // Get glyph width to check if it goes out of bounds
+            if (guiFont.glyphs[index].advanceX == 0) glyphWidth = ((float)guiFont.recs[index].width*scaleFactor);
+            else glyphWidth = (float)guiFont.glyphs[index].advanceX*scaleFactor;
+
             // Wrap mode text measuring, to validate if 
             // it can be drawn or a new line is required
             if (wrapMode == TEXT_WRAP_CHAR)
             {
-                // Get glyph width to check if it goes out of bounds
-                if (guiFont.glyphs[index].advanceX == 0) glyphWidth = ((float)guiFont.recs[index].width*scaleFactor);
-                else glyphWidth = (float)guiFont.glyphs[index].advanceX*scaleFactor;
-
                 // Jump to next line if current character reach end of the box limits
-                if ((textOffsetX + glyphWidth) > textBounds.width)
+                if ((textOffsetX + glyphWidth) > textBounds.width - textBoundsWidthOffset)
                 {
                     textOffsetX = 0.0f;
                     textOffsetY += GuiGetStyle(DEFAULT, TEXT_LINE_SPACING);
@@ -4905,13 +4912,13 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
                 int nextSpaceIndex2 = 0;
                 float nextWordSize = GetNextSpaceWidth(lines[i] + lastSpaceIndex + 1, &nextSpaceIndex2);
 
-                if (nextWordSize > textBounds.width)
+                if (nextWordSize > textBounds.width - textBoundsWidthOffset)
                 {
                     // Considering the case the next word is longer than bounds
                     tempWrapCharMode = true;
                     wrapMode = TEXT_WRAP_CHAR;
                 }
-                else if ((textOffsetX + nextSpaceWidth) > textBounds.width)
+                else if ((textOffsetX + nextSpaceWidth) > textBounds.width - textBoundsWidthOffset)
                 {
                     textOffsetX = 0.0f;
                     textOffsetY += GuiGetStyle(DEFAULT, TEXT_LINE_SPACING);
@@ -4928,7 +4935,21 @@ static void GuiDrawText(const char *text, Rectangle textBounds, int alignment, C
                     if (wrapMode == TEXT_WRAP_NONE)
                     {
                         // Draw only required text glyphs fitting the textBounds.width
-                        if (textOffsetX <= (textBounds.width - glyphWidth))
+                        if (textSizeX > textBounds.width)
+                        {
+                            if (textOffsetX <= (textBounds.width - glyphWidth - textBoundsWidthOffset - ellipsisWidth))
+                            {
+                                DrawTextCodepoint(guiFont, codepoint, RAYGUI_CLITERAL(Vector2){ textBoundsPosition.x + textOffsetX, textBoundsPosition.y + textOffsetY }, (float)GuiGetStyle(DEFAULT, TEXT_SIZE), GuiFade(tint, guiAlpha));
+                            }
+                            else if (!overflowReached)
+                            {
+                                overflowReached = true;
+                                for (int j = 0; j < ellipsisWidth; j += ellipsisWidth/3) {
+                                    DrawTextCodepoint(guiFont, '.', RAYGUI_CLITERAL(Vector2){ textBoundsPosition.x + textOffsetX + j, textBoundsPosition.y + textOffsetY }, (float)GuiGetStyle(DEFAULT, TEXT_SIZE), GuiFade(tint, guiAlpha));
+                                }
+                            }
+                        }
+                        else
                         {
                             DrawTextCodepoint(guiFont, codepoint, RAYGUI_CLITERAL(Vector2){ textBoundsPosition.x + textOffsetX, textBoundsPosition.y + textOffsetY }, (float)GuiGetStyle(DEFAULT, TEXT_SIZE), GuiFade(tint, guiAlpha));
                         }