Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/cdrawmethods.cpp

@@ -0,0 +1,183 @@
+// This file is part of VSTGUI. It is subject to the license terms 
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#include "cdrawmethods.h"
+#include "cbitmap.h"
+#include "cstring.h"
+#include "cdrawcontext.h"
+#include "platform/iplatformfont.h"
+
+namespace VSTGUI {
+
+namespace CDrawMethods {
+
+//------------------------------------------------------------------------
+UTF8String createTruncatedText (TextTruncateMode mode, const UTF8String& text, CFontRef font,
+                                CCoord maxWidth, const CPoint& textInset, uint32_t flags)
+{
+	if (mode == kTextTruncateNone || text.length () < 2)
+		return text;
+	auto painter = font->getPlatformFont () ? font->getPlatformFont ()->getPainter () : nullptr;
+	if (!painter)
+		return text;
+	CCoord width = painter->getStringWidth (nullptr, text.getPlatformString (), true);
+	width += textInset.x * 2;
+	if (width > maxWidth)
+	{
+		std::string truncatedText;
+		UTF8String result;
+		auto left = text.begin ();
+		auto right = text.end ();
+		size_t distance = std::distance (left, right) - 1;
+		int32_t dir = 1;
+		while (distance > 0 && width != maxWidth)
+		{
+			distance = (distance / 2);
+			while ((dir > 0 ? (width > maxWidth) : (width < maxWidth)) && distance > 0)
+			{
+				if (mode == kTextTruncateHead)
+				{
+					if (dir > 0)
+					{
+						for (auto i = distance; i > 0 && left != right; --i)
+							++left;
+					}
+					else
+					{
+						for (auto i = distance; i > 0 && left != text.begin (); --i)
+							--left;
+					}
+					truncatedText = "..";
+				}
+				else if (mode == kTextTruncateTail)
+				{
+					if (dir > 0)
+					{
+						for (auto i = distance; i > 0 && left != right; --i)
+							--right;
+					}
+					else
+					{
+						for (auto i = distance; i > 0 && right != text.end (); --i)
+							++right;
+					}
+					truncatedText = "";
+				}
+
+				truncatedText += {left.base (), right.base ()};
+
+				if (mode == kTextTruncateTail)
+					truncatedText += "..";
+
+				result = truncatedText;
+				width = painter->getStringWidth (nullptr, result.getPlatformString (), true);
+				width += textInset.x * 2;
+				if (left == right)
+					break;
+			}
+			dir *= -1;
+		}
+		if (left == right && flags & kReturnEmptyIfTruncationIsPlaceholderOnly)
+			result = "";
+		return result;
+	}
+	return text;
+}
+
+//------------------------------------------------------------------------
+void drawIconAndText (CDrawContext* context, CBitmap* iconToDraw, IconPosition iconPosition,
+                      CHoriTxtAlign textAlignment, CCoord textIconMargin, CRect drawRect,
+                      const UTF8String& title, CFontRef font, CColor textColor,
+                      TextTruncateMode textTruncateMode)
+{
+	if (iconToDraw)
+	{
+		CRect iconRect (0, 0, iconToDraw->getWidth (), iconToDraw->getHeight ());
+		iconRect.offset (drawRect.left, drawRect.top);
+		switch (iconPosition)
+		{
+			case kIconLeft:
+			{
+				iconRect.offset (textIconMargin,
+				                 drawRect.getHeight () / 2. - iconRect.getHeight () / 2.);
+				drawRect.left = iconRect.right;
+				drawRect.right -= textIconMargin;
+				if (textAlignment == kLeftText)
+					drawRect.left += textIconMargin;
+				break;
+			}
+			case kIconRight:
+			{
+				iconRect.offset (drawRect.getWidth () - (textIconMargin + iconRect.getWidth ()),
+				                 drawRect.getHeight () / 2. - iconRect.getHeight () / 2.);
+				drawRect.right = iconRect.left;
+				drawRect.left += textIconMargin;
+				if (textAlignment == kRightText)
+					drawRect.right -= textIconMargin;
+				break;
+			}
+			case kIconCenterAbove:
+			{
+				iconRect.offset (drawRect.getWidth () / 2. - iconRect.getWidth () / 2., 0);
+				if (title.empty ())
+					iconRect.offset (0, drawRect.getHeight () / 2. - iconRect.getHeight () / 2.);
+				else
+				{
+					iconRect.offset (0, drawRect.getHeight () / 2. -
+					                        (iconRect.getHeight () / 2. +
+					                         (textIconMargin + font->getSize ()) / 2.));
+					drawRect.top = iconRect.bottom + textIconMargin;
+					drawRect.setHeight (font->getSize ());
+					if (textAlignment == kLeftText)
+						drawRect.left += textIconMargin;
+					else if (textAlignment == kRightText)
+						drawRect.right -= textIconMargin;
+				}
+				break;
+			}
+			case kIconCenterBelow:
+			{
+				iconRect.offset (drawRect.getWidth () / 2. - iconRect.getWidth () / 2., 0);
+				if (title.empty ())
+					iconRect.offset (0, drawRect.getHeight () / 2. - iconRect.getHeight () / 2.);
+				else
+				{
+					iconRect.offset (0, drawRect.getHeight () / 2. - (iconRect.getHeight () / 2.) +
+					                        (textIconMargin + font->getSize ()) / 2.);
+					drawRect.top = iconRect.top - (textIconMargin + font->getSize ());
+					drawRect.setHeight (font->getSize ());
+					if (textAlignment == kLeftText)
+						drawRect.left += textIconMargin;
+					else if (textAlignment == kRightText)
+						drawRect.right -= textIconMargin;
+				}
+				break;
+			}
+		}
+		context->drawBitmap (iconToDraw, iconRect);
+	}
+	else
+	{
+		if (textAlignment == kLeftText)
+			drawRect.left += textIconMargin;
+		else if (textAlignment == kRightText)
+			drawRect.right -= textIconMargin;
+	}
+	if (!title.empty ())
+	{
+		context->setFont (font);
+		context->setFontColor (textColor);
+		if (textTruncateMode != kTextTruncateNone)
+		{
+			UTF8String truncatedText =
+			    createTruncatedText (textTruncateMode, title, font, drawRect.getWidth (),
+			                         CPoint (0, 0), kReturnEmptyIfTruncationIsPlaceholderOnly);
+			context->drawString (truncatedText.getPlatformString (), drawRect, textAlignment);
+		}
+		else
+			context->drawString (title.getPlatformString (), drawRect, textAlignment);
+	}
+}
+}
+} // namespaces