PyAPI: Call to get the pixel x,y in a text block

This allows scripts to request the screen location of any (line, column) pair.

source/blender/blenkernel/BKE_screen.h

@@ -280,6 +280,7 @@ void            BKE_screen_area_free(struct ScrArea *sa);
 
 struct ARegion *BKE_area_find_region_type(struct ScrArea *sa, int type);
 struct ARegion *BKE_area_find_region_active_win(struct ScrArea *sa);
+struct ScrArea *BKE_screen_find_area_from_space(struct bScreen *sc, struct SpaceLink *sl) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1, 2);
 struct ScrArea *BKE_screen_find_big_area(struct bScreen *sc, const int spacetype, const short min);
 
 unsigned int BKE_screen_view3d_layer_active_ex(

source/blender/blenkernel/intern/screen.c

@@ -402,6 +402,23 @@ ARegion *BKE_area_find_region_active_win(ScrArea *sa)
 	return NULL;
 }
 
+/**
+ * \note, ideally we can get the area from the context,
+ * there are a few places however where this isn't practical.
+ */
+ScrArea *BKE_screen_find_area_from_space(struct bScreen *sc, SpaceLink *sl)
+{
+	ScrArea *sa;
+
+	for (sa = sc->areabase.first; sa; sa = sa->next) {
+		if (BLI_findindex(&sa->spacedata, sl) != -1) {
+			break;
+		}
+	}
+
+	return sa;
+}
+
 /* note, using this function is generally a last resort, you really want to be
  * using the context when you can - campbell
  * -1 for any type */

source/blender/editors/include/ED_text.h

@@ -31,8 +31,11 @@
 #define __ED_TEXT_H__
 
 struct bContext;
+struct SpaceText;
+struct ARegion;
 
 void ED_text_undo_step(struct bContext *C, int step);
+bool ED_text_region_location_from_cursor(struct SpaceText *st, struct ARegion *ar, const int cursor_co[2], int r_pixel_co[2]);
 
 #endif /* __ED_TEXT_H__ */
 

source/blender/editors/space_text/text_draw.c

@@ -44,6 +44,8 @@
 #include "BKE_text.h"
 #include "BKE_screen.h"
 
+#include "ED_text.h"
+
 #include "BIF_gl.h"
 
 #include "UI_interface.h"
@@ -1547,3 +1549,37 @@ void text_update_cursor_moved(bContext *C)
 
 	text_scroll_to_cursor__area(st, sa, true);
 }
+
+/**
+ * Takes a cursor (row, character) and returns x,y pixel coords.
+ */
+bool ED_text_region_location_from_cursor(SpaceText *st, ARegion* ar, const int cursor_co[2], int r_pixel_co[2])
+{
+	TextLine *line = NULL;
+
+	if (!st->text) {
+		goto error;
+	}
+
+	line = BLI_findlink(&st->text->lines, cursor_co[0]);
+	if (!line || (cursor_co[1] < 0) || (cursor_co[1] > line->len)) {
+		goto error;
+	}
+	else {
+		int offl, offc;
+		int linenr_offset = st->showlinenrs ? TXT_OFFSET + TEXTXLOC : TXT_OFFSET;
+		/* handle tabs as well! */
+		int char_pos = text_get_char_pos(st, line->line, cursor_co[1]);
+
+		wrap_offset(st, ar, line, cursor_co[1], &offl, &offc);
+		r_pixel_co[0] = (char_pos + offc - st->left) * st->cwidth + linenr_offset;
+		r_pixel_co[1] = (cursor_co[0] + offl - st->top) * (st->lheight_dpi + TXT_LINE_SPACING);
+		r_pixel_co[1] = (ar->winy - (r_pixel_co[1] + TXT_OFFSET)) - st->lheight_dpi;
+	}
+	return true;
+
+
+error:
+	r_pixel_co[0] = r_pixel_co[1] = -1;
+	return false;
+}

source/blender/makesrna/intern/rna_internal.h

@@ -287,6 +287,7 @@ void RNA_api_ui_layout(struct StructRNA *srna);
 void RNA_api_window(struct StructRNA *srna);
 void RNA_api_wm(struct StructRNA *srna);
 void RNA_api_space_node(struct StructRNA *srna);
+void RNA_api_space_text(struct StructRNA *srna);
 void RNA_api_region_view3d(struct StructRNA *srna);
 void RNA_api_sensor(struct StructRNA *srna);
 void RNA_api_controller(struct StructRNA *srna);

source/blender/makesrna/intern/rna_space.c

@@ -266,13 +266,7 @@ static ScrArea *rna_area_from_space(PointerRNA *ptr)
 {
 	bScreen *sc = (bScreen *)ptr->id.data;
 	SpaceLink *link = (SpaceLink *)ptr->data;
-	ScrArea *sa;
-
-	for (sa = sc->areabase.first; sa; sa = sa->next)
-		if (BLI_findindex(&sa->spacedata, link) != -1)
-			return sa;
-
-	return NULL;
+	return BKE_screen_find_area_from_space(sc, link);
 }
 
 static void area_region_from_regiondata(bScreen *sc, void *regiondata, ScrArea **r_sa, ARegion **r_ar)
@@ -856,7 +850,6 @@ static void rna_SpaceTextEditor_updateEdited(Main *UNUSED(bmain), Scene *UNUSED(
 		WM_main_add_notifier(NC_TEXT | NA_EDITED, st->text);
 }
 
-
 /* Space Properties */
 
 /* note: this function exists only to avoid id refcounting */
@@ -2748,6 +2741,8 @@ static void rna_def_space_text(BlenderRNA *brna)
 	RNA_def_property_string_sdna(prop, NULL, "replacestr");
 	RNA_def_property_ui_text(prop, "Replace Text", "Text to replace selected text with using the replace tool");
 	RNA_def_property_update(prop, NC_SPACE | ND_SPACE_TEXT, NULL);
+
+	RNA_api_space_text(srna);
 }
 
 static void rna_def_space_dopesheet(BlenderRNA *brna)

source/blender/makesrna/intern/rna_space_api.c

@@ -31,6 +31,8 @@
 
 #ifdef RNA_RUNTIME
 
+#include "ED_text.h"
+
 static void rna_RegionView3D_update(ID *id, RegionView3D *rv3d)
 {
 	bScreen *sc = (bScreen *)id;
@@ -49,6 +51,19 @@ static void rna_RegionView3D_update(ID *id, RegionView3D *rv3d)
 	}
 }
 
+static void rna_SpaceTextEditor_region_location_from_cursor(
+        ID *id, SpaceText *st,
+        int line, int column, int r_pixel_pos[2])
+{
+	bScreen *sc = (bScreen *)id;
+	ScrArea *sa = BKE_screen_find_area_from_space(sc, (SpaceLink *)st);
+	if (sa) {
+		ARegion *ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
+		const int cursor_co[2] = {line, column};
+		ED_text_region_location_from_cursor(st, ar, cursor_co, r_pixel_pos);
+	}
+}
+
 #else
 
 void RNA_api_region_view3d(StructRNA *srna)
@@ -74,4 +89,20 @@ void RNA_api_space_node(StructRNA *srna)
 	RNA_def_property_flag(parm, PROP_REQUIRED);
 }
 
+void RNA_api_space_text(StructRNA *srna)
+{
+	FunctionRNA *func;
+	PropertyRNA *parm;
+
+	func = RNA_def_function(srna, "region_location_from_cursor", "rna_SpaceTextEditor_region_location_from_cursor");
+	RNA_def_function_ui_description(func, "Retrieve the region position from the given line and character position");
+	RNA_def_function_flag(func, FUNC_USE_SELF_ID);
+	parm = RNA_def_int(func, "line", 0, INT_MIN, INT_MAX, "Line", "Line index", 0, INT_MAX);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_int(func, "column", 0, INT_MIN, INT_MAX, "Column", "Column index", 0, INT_MAX);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_int_array(func, "result", 2, 0, -1, INT_MAX, "", "Region coordinates", -1, INT_MAX);
+	RNA_def_function_output(func, parm);
+}
+
 #endif

source/blenderplayer/bad_level_call_stubs/stubs.c

@@ -163,6 +163,7 @@ struct wmWindowManager;
 #include "../blender/editors/include/ED_render.h"
 #include "../blender/editors/include/ED_screen.h"
 #include "../blender/editors/include/ED_space_api.h"
+#include "../blender/editors/include/ED_text.h"
 #include "../blender/editors/include/ED_transform.h"
 #include "../blender/editors/include/ED_uvedit.h"
 #include "../blender/editors/include/ED_view3d.h"
@@ -482,6 +483,8 @@ bool ED_texture_context_check_lamp(const struct bContext *C) RET_ZERO
 bool ED_texture_context_check_particles(const struct bContext *C) RET_ZERO
 bool ED_texture_context_check_others(const struct bContext *C) RET_ZERO
 
+bool ED_text_region_location_from_cursor(SpaceText *st, ARegion *ar, const int cursor_co[2], int r_pixel_co[2]) RET_ZERO
+
 bool snapObjectsRayEx(struct Scene *scene, struct Base *base_act, struct View3D *v3d, struct ARegion *ar, struct Object *obedit, short snap_mode,
                       struct Object **r_ob, float r_obmat[4][4],
                       const float ray_start[3], const float ray_normal[3], float *r_ray_dist,