Bug 1372521 - Support multi-line stub installer footer text. r=rstrong

MozReview-Commit-ID: CVFRg2y3ruo

--HG--
extra : rebase_source : 3e310afae748adca121a4f095aa9970e436e0d3e

browser/installer/windows/nsis/defines.nsi.in

@@ -128,6 +128,7 @@ VIAddVersionKey "ProductVersion"  "${AppVersion}"
 !define NOW_INSTALLING_TOP_DU 70u
 !define INSTALL_BLURB_TOP_DU 137u
 !define INSTALL_FOOTER_TOP_DU -48u
+!define INSTALL_FOOTER_WIDTH_DU 300u
 !define PROGRESS_BAR_TOP_DU 112u
 !define APPNAME_BMP_EDGE_DU 19u
 !define APPNAME_BMP_TOP_DU 12u

browser/installer/windows/nsis/stub.nsi

@@ -831,9 +831,17 @@ Function createInstall
 
   StrCpy $CurrentBlurbIdx "0"
 
+  ; In some locales, the footer message may be too long to fit on one line.
+  ; Figure out how much height it needs and give it that much.
+  ${GetTextExtent} "$(STUB_BLURB_FOOTER)" $FontFooter $R1 $R2
+  StrCpy $1 0
+  ${While} $R1 > 0
+    IntOp $1 $1 + $R2
+    IntOp $R1 $R1 - ${INSTALL_FOOTER_WIDTH_DU}
+  ${EndWhile}
   nsDialogs::CreateControl STATIC ${DEFAULT_STYLES}|${SS_NOTIFY}|${SS_RIGHT} \
-    ${WS_EX_TRANSPARENT} -433u ${INSTALL_FOOTER_TOP_DU} 400u 20u \
-    "$(STUB_BLURB_FOOTER)"
+    ${WS_EX_TRANSPARENT} -320u ${INSTALL_FOOTER_TOP_DU} \
+    ${INSTALL_FOOTER_WIDTH_DU} "$1u" "$(STUB_BLURB_FOOTER)"
   Pop $0
   SendMessage $0 ${WM_SETFONT} $FontFooter 0
   SetCtlColors $0 ${INSTALL_BLURB_TEXT_COLOR} transparent