Bug 1811076: Part 6 - Show a cancelable "slow agent" dialog on slow content analysis r=nika,Gijs,rkraesig,fluent-reviewers,bolsson

This adds a modal dialog to some content analysis use cases that blocks
input while CA is running.  The dialog can be canceled, which cancels the
CA (if possible) and the operation that required it.

Differential Revision: https://phabricator.services.mozilla.com/D189578

UltraBlame original commit: 7ca7d7ab66453b81c86545a277ab0fdde9f19171

Author: marco-c

browser/components/contentanalysis/content/ContentAnalysis.sys.mjs

@@ -187,6 +187,28 @@ lazy
 {
 }
 ;
+XPCOMUtils
+.
+defineLazyServiceGetter
+(
+lazy
+"
+gContentAnalysis
+"
+"
+mozilla
+.
+org
+/
+contentanalysis
+;
+1
+"
+Ci
+.
+nsIContentAnalysis
+)
+;
 ChromeUtils
 .
 defineESModuleGetters
@@ -2236,7 +2258,27 @@ aOperation
 )
 {
 return
-false
+!
+(
+aOperation
+=
+=
+Ci
+.
+nsIContentAnalysisRequest
+.
+FILE_DOWNLOADED
+|
+|
+aOperation
+=
+=
+Ci
+.
+nsIContentAnalysisRequest
+.
+PRINT
+)
 ;
 }
 /
@@ -2696,6 +2738,12 @@ Ci
 nsIPromptService
 .
 BUTTON_TITLE_CANCEL
++
+Ci
+.
+nsIPromptService
+.
+SHOW_SPINNER
 null
 null
 null
@@ -2809,6 +2857,15 @@ aRequestToken
 )
 )
 {
+lazy
+.
+gContentAnalysis
+.
+cancelContentAnalysisRequest
+(
+aRequestToken
+)
+;
 let
 dlpBusyView
 =

netwerk/base/nsIPrompt.idl

@@ -207,6 +207,16 @@ BUTTON_DELAY_ENABLE
 const
 unsigned
 long
+SHOW_SPINNER
+=
+1
+<
+<
+27
+;
+const
+unsigned
+long
 STD_OK_CANCEL_BUTTONS
 =
 (