tdf#123505 svx: fix invalidation loop caused by special form control geometry

Regression from commit d464d505fbf6e53a38afdd3661d320fac8c760d6
(Refactor calc non-linear ViewToDevice transform, 2018-10-12), the
problem was that the opengl menu was never painted from the starved idle
handler as a paint-invalidation loop starved the main loop.

ScGridWindow::Paint() called vcl::Window::ImplPosSizeWindow() for the
form control of the bugdoc, which triggered an invalidation -> paint ->
start again.

Checking what adjustControlGeometry_throw() did, the result of the
transformed points are quite close to each other, but not equivalent:

debug:18521:18521: adjustControlGeometry_throw: aTopLeft before transformation is (1773,426)
debug:18521:18521: adjustControlGeometry_throw: aTopLeft after transformation is (64.935,16.0382)
debug:18521:18521: adjustControlGeometry_throw: aPaintRectPixel is 952x586@(64,16)

If we round, rather than truncate, then the size of the control is
always the same, so no actual resize and invalidation happens during
paint.

Change-Id: Id55fd227e3ae7fc57d5253bc28f42b9b4315450e
Reviewed-on: https://gerrit.libreoffice.org/69821
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

2 files changed, 51 insertions, 0 deletions

diff --git a/sc/qa/unit/tiledrendering/data/invalidation-loop.fods b/sc/qa/unit/tiledrendering/data/invalidation-loop.fods
new file mode 100644
index 000000000000..f7594c3ec4f3
--- /dev/null
+++ b/sc/qa/unit/tiledrendering/data/invalidation-loop.fods
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:presentation="urn:oasis:names:tc:opendocument:xmlns:presentation:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:ooo="http://openoffice.org/2004/office" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.spreadsheet">
+  <office:styles>
+  </office:styles>
+  <office:automatic-styles>
+    <style:style style:name="co1" style:family="table-column">
+      <style:table-column-properties fo:break-before="auto" style:column-width="17.73mm"/>
+    </style:style>
+    <style:style style:name="co2" style:family="table-column">
+      <style:table-column-properties fo:break-before="auto" style:column-width="19.84mm"/>
+    </style:style>
+    <style:page-layout style:name="pm1">
+      <style:page-layout-properties fo:page-width="210.01mm" fo:page-height="297mm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="24.99mm" fo:margin-bottom="12.51mm" fo:margin-left="20mm" fo:margin-right="20mm" style:first-page-number="continue" style:scale-to="100%" style:writing-mode="lr-tb"/>
+    </style:page-layout>
+  </office:automatic-styles>
+  <office:master-styles>
+    <style:master-page style:name="PageStyle_5f_Branco" style:display-name="PageStyle_Branco" style:page-layout-name="pm1"/>
+  </office:master-styles>
+  <office:body>
+    <office:spreadsheet>
+      <table:table table:name="Branco" table:style-name="ta1">
+        <office:forms form:automatic-focus="false" form:apply-design-mode="false">
+          <form:form form:name="Standard" form:apply-filter="true" form:control-implementation="ooo:com.sun.star.form.component.Form" office:target-frame="">
+            <form:fixed-text form:name="Label2" form:control-implementation="ooo:com.sun.star.form.component.FixedText" xml:id="control1" form:id="control1" form:multi-line="true"/>
+          </form:form>
+        </office:forms>
+        <table:table-column table:style-name="co1" table:number-columns-repeated="11" table:default-cell-style-name="Default"/>
+        <table:table-column table:style-name="co2" table:number-columns-repeated="2" table:default-cell-style-name="Default"/>
+        <table:table-column table:style-name="co1" table:number-columns-repeated="1011" table:default-cell-style-name="Default"/>
+        <table:table-row>
+          <table:table-cell>
+            <draw:g draw:z-index="0" draw:name="Grupo 4">
+              <draw:control draw:name="Label2" draw:text-style-name="P1" svg:width="259.72mm" svg:height="155.83mm" svg:x="17.73mm" svg:y="4.26mm" draw:control="control1"/>
+            </draw:g>
+          </table:table-cell>
+        </table:table-row>
+      </table:table>
+    </office:spreadsheet>
+  </office:body>
+</office:document>
diff --git a/sc/qa/unit/tiledrendering/tiledrendering.cxx b/sc/qa/unit/tiledrendering/tiledrendering.cxx
index ba7b9041421a..9f6304aee774 100644
--- a/sc/qa/unit/tiledrendering/tiledrendering.cxx
+++ b/sc/qa/unit/tiledrendering/tiledrendering.cxx
@@ -92,6 +92,7 @@ public:
     void testIMESupport();
     void testFilterDlg();
     void testVbaRangeCopyPaste();
+    void testInvalidationLoop();
 
     CPPUNIT_TEST_SUITE(ScTiledRenderingTest);
     CPPUNIT_TEST(testRowColumnSelections);
@@ -125,6 +126,7 @@ public:
     CPPUNIT_TEST(testIMESupport);
     CPPUNIT_TEST(testFilterDlg);
     CPPUNIT_TEST(testVbaRangeCopyPaste);
+    CPPUNIT_TEST(testInvalidationLoop);
     CPPUNIT_TEST_SUITE_END();
 
 private:
@@ -1677,6 +1679,15 @@ void ScTiledRenderingTest::testVbaRangeCopyPaste()
     comphelper::LibreOfficeKit::setActive(false);
 }
 
+void ScTiledRenderingTest::testInvalidationLoop()
+{
+    // Load the document with a form control.
+    createDoc("invalidation-loop.fods");
+    // Without the accompanying fix in place, this test would have never returned due to an infinite
+    // invalidation loop between ScGridWindow::Paint() and vcl::Window::ImplPosSizeWindow().
+    Scheduler::ProcessEventsToIdle();
+}
+
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(ScTiledRenderingTest);