From c0db113367fede6a2669a748ffee3bad2247e5e1 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Thu, 14 Jan 2016 20:02:01 -0500
Subject: [PATCH] Started adding support for multiline uiDrawTextLayouts and
 extracting the extents from them.

---
 test/page9.c | 19 ++++++++++++++++---
 ui.h         |  5 ++++-
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/test/page9.c b/test/page9.c
index 05402833..e24f9215 100644
--- a/test/page9.c
+++ b/test/page9.c
@@ -11,6 +11,7 @@ static uiCombobox *textItalic;
 static uiCheckbox *textSmallCaps;
 static uiCombobox *textStretch;
 static uiCombobox *textGravity;
+static uiEntry *textWidth;
 static uiButton *textApply;
 static uiCheckbox *addLeading;
 static uiArea *textArea;
@@ -89,6 +90,8 @@ static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *dp)
 	uiDrawTextLayout *layout;
 	uiDrawTextFontMetrics metrics;
 	double ypos;
+	double width;
+	double height;
 
 	memset(&desc, 0, sizeof (uiDrawTextFontDescriptor));
 	family = uiEntryText(textFont);
@@ -103,17 +106,27 @@ static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *dp)
 	uiFreeText(family);
 	uiDrawTextFontGetMetrics(font, &metrics);
 
+	width = entryDouble(textWidth);
+
 	drawGuides(dp->Context, &metrics);
 
 	s = uiEntryText(textString);
-	layout = uiDrawNewTextLayout(s, font);
+	layout = uiDrawNewTextLayout(s, font, width);
 	uiFreeText(s);
 	ypos = 10;
 	uiDrawText(dp->Context, 10, ypos, layout);
+	// TODO make these optional?
+	uiDrawTextLayoutExtents(dp->Context, &width, &height);
 	uiDrawFreeTextLayout(layout);
 
-	layout = uiDrawNewTextLayout("This is a second line", font);
-	ypos += metrics.Ascent + metrics.Descent;
+	layout = uiDrawNewTextLayout("This is a second line", font, -1);
+	if (/*TODO*/entryDouble(textWidth) < 0) {
+		double ad;
+
+		ad = metrics.Ascent + metrics.Descent;
+		printf("ad:%g extent:%g", ad, height);
+	}
+	ypos += height;
 	if (uiCheckboxChecked(addLeading))
 		ypos += metrics.Leading;
 	uiDrawText(dp->Context, 10, ypos, layout);
diff --git a/ui.h b/ui.h
index bd27bdf4..69bce336 100644
--- a/ui.h
+++ b/ui.h
@@ -526,8 +526,11 @@ _UI_EXTERN void uiDrawTextFontDescribe(uiDrawTextFont *font, uiDrawTextFontDescr
 // TODO yuck this name
 _UI_EXTERN void uiDrawTextFontGetMetrics(uiDrawTextFont *font, uiDrawTextFontMetrics *metrics);
 
-_UI_EXTERN uiDrawTextLayout *uiDrawNewTextLayout(const char *text, uiDrawTextFont *defaultFont);
+_UI_EXTERN uiDrawTextLayout *uiDrawNewTextLayout(const char *text, uiDrawTextFont *defaultFont, double width);
 _UI_EXTERN void uiDrawFreeTextLayout(uiDrawTextLayout *layout);
+// TODO get width
+_UI_EXTERN void uiDrawTextLayoutSetWidth(uiDrawTextLayout *layout, double width);
+_UI_EXTERN void uiDrawTextLayoutExtents(uiDrawTextLayout *layout, double *width, double *height);
 
 _UI_EXTERN void uiDrawText(uiDrawContext *c, double x, double y, uiDrawTextLayout *layout);