svg export filter: when a text field is too small, its content is wrong

When the text field width is too small, the placeholder text spans
several lines.
That stopped the js engine to substitute the text field placeholder
with the right content.
This is a workaround but it should work in the majority of cases.
A complete solution needs to support svg text wrapping.

Change-Id: Ide52e08acd35b3764b8abc600e4b467acea0a248
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/142794
Tested-by: Andras Timar <andras.timar@collabora.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/filter/source/svg/presentation_engine.js b/filter/source/svg/presentation_engine.js
index cf49ba565192..dbfe2ab0f914 100644
--- a/filter/source/svg/presentation_engine.js
+++ b/filter/source/svg/presentation_engine.js
@@ -5401,6 +5401,29 @@ function getTextFieldType ( elem )
             else if (sContent === '<header>')
                 sFieldType = aHeaderClassName;
         }
+
+        if( sFieldType )
+            return sFieldType;
+
+        var aTextPortionElement = getElementByClassName( elem, 'TextPortion' );
+        if( aTextPortionElement )
+        {
+            var sContent = aTextPortionElement.textContent
+            if( sContent.indexOf( '<number>' ) != -1 )
+                sFieldType = aSlideNumberClassName;
+            else if( sContent.indexOf( '<date/time>' ) != -1 )
+                sFieldType = aDateTimeClassName;
+            else if( sContent.indexOf( '<date>' ) != -1 )
+                sFieldType = aDateClassName;
+            else if( sContent.indexOf( '<time>' ) != -1 )
+                sFieldType = aTimeClassName;
+            else if( sContent.indexOf( '<slide-name>' ) != -1 )
+                sFieldType = aSlideNameClassName;
+            else if( sContent.indexOf( '<footer>' ) != -1 )
+                sFieldType = aFooterClassName;
+            else if( sContent.indexOf( '<header>' ) != -1 )
+                sFieldType = aHeaderClassName;
+        }
     }
     return sFieldType;
 }
@@ -5610,6 +5633,20 @@ PlaceholderShape.prototype.init = function()
         var aTextElem = getElementByClassName( aTextFieldElement, 'SVGTextShape' );
         if( aTextElem )
         {
+            var aTextParagraphSet = getElementsByClassName( aTextElem, 'TextParagraph' );
+            // When the text field width is too small, the placeholder text spans several lines.
+            // We remove all text lines but the first one which is used as a placeholder.
+            // This is a workaround but it should work in the majority of cases.
+            // A complete solution needs to support svg text wrapping.
+            if( aTextParagraphSet.length > 1 )
+            {
+                var i = aTextParagraphSet.length;
+                while( i > 1 )
+                {
+                    aTextElem.removeChild(aTextParagraphSet[i-1]);
+                    --i;
+                }
+            }
             var aPlaceholderElement = getElementByClassName(aTextElem, 'PlaceholderText');
             if( aPlaceholderElement )
             {