Add getDocumentScale() to return "real-world" to "user-unit" scale factor.

Use it to correct text postion after removing from path.

(bzr r13843)

1 files changed, 20 insertions, 0 deletions

diff --git a/src/document.cpp b/src/document.cpp
index 4b074c2fa..2caefb4ed 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -604,12 +604,32 @@ Inkscape::Util::Unit const* SPDocument::getDisplayUnit() const
 
 /// guaranteed not to return nullptr
 // returns 'px' units as default, like legacy Inkscape
+// THIS SHOULD NOT BE USED... INSTEAD USE DOCUMENT SCALE
 Inkscape::Util::Unit const& SPDocument::getSVGUnit() const
 {
     SPNamedView const* nv = sp_document_namedview(this, NULL);
     return nv ? nv->getSVGUnit() : *unit_table.getUnit("px");
 }
 
+/// Returns document scale as defined by width/height and viewBox (real world to user-units).
+Geom::Scale SPDocument::getDocumentScale() const
+{
+    Geom::Scale scale;
+    if( root->viewBox_set ) {
+        double scale_x = 1.0;
+        double scale_y = 1.0;
+        if( root->viewBox.width() > 0.0 ) {
+            scale_x = root->width.computed / root->viewBox.width();
+        }
+        if( root->viewBox.height() > 0.0 ) {
+            scale_y = root->height.computed / root->viewBox.height();
+        }
+        scale = Geom::Scale(scale_x, scale_y);
+    }
+    // std::cout << "SPDocument::getDocumentScale():\n" << scale << std::endl;
+    return scale;
+}
+
 // Avoid calling root->updateRepr() twice by combining setting width and height.
 // (As done on every delete as clipboard calls this via fitToRect(). Also called in page-sizer.cpp)
 void SPDocument::setWidthAndHeight(const Inkscape::Util::Quantity &width, const Inkscape::Util::Quantity &height, bool changeSize)