Add NVG_DISABLE_SKIPPING_WHITESPACE build option

dgl/Makefile

@@ -13,6 +13,9 @@ BUILD_CXX_FLAGS += $(DGL_FLAGS) -I. -Isrc -DDONT_SET_USING_DGL_NAMESPACE -Wno-un
 BUILD_CXX_FLAGS += -Isrc/pugl-upstream/include
 LINK_FLAGS      += $(DGL_LIBS)
 
+ifeq ($(NVG_DISABLE_SKIPPING_WHITESPACE),true)
+BUILD_CXX_FLAGS += -DNVG_DISABLE_SKIPPING_WHITESPACE
+endif
 ifeq ($(USE_OPENGL3),true)
 BUILD_CXX_FLAGS += -DDGL_USE_OPENGL3
 endif

dgl/src/nanovg/nanovg.c

@@ -30,6 +30,12 @@
 #include "stb_image.h"
 #endif
 
+#ifdef NVG_DISABLE_SKIPPING_WHITESPACE
+#define NVG_SKIPPED_CHAR NVG_SPACE
+#else
+#define NVG_SKIPPED_CHAR NVG_CHAR
+#endif
+
 #ifdef _MSC_VER
 #pragma warning(disable: 4100)  // unreferenced formal parameter
 #pragma warning(disable: 4127)  // conditional expression is constant
@@ -2775,7 +2781,7 @@ int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, floa
 		} else {
 			if (rowStart == NULL) {
 				// Skip white space until the beginning of the line
-				if (type == NVG_CHAR || type == NVG_CJK_CHAR) {
+				if (type == NVG_CHAR || type == NVG_CJK_CHAR || type == NVG_SKIPPED_CHAR) {
 					// The current char is the row so far
 					rowStartX = iter.x;
 					rowStart = iter.str;
@@ -2795,7 +2801,7 @@ int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, floa
 				float nextWidth = iter.nextx - rowStartX;
 
 				// track last non-white space character
-				if (type == NVG_CHAR || type == NVG_CJK_CHAR) {
+				if (type == NVG_CHAR || type == NVG_CJK_CHAR || type == NVG_SKIPPED_CHAR) {
 					rowEnd = iter.next;
 					rowWidth = iter.nextx - rowStartX;
 					rowMaxX = q.x1 - rowStartX;