speedreader: icon: Fix accessible text

In 85a5f8b we removed the label from the Speedreader icon. To make up
for this, we need more descriptive accessible text. This is taken from
the figma document linked in the issue.

Resolves brave/brave-browser#16881

app/brave_generated_resources.grd

@@ -1189,6 +1189,15 @@ By installing this extension, you are agreeing to the Google Widevine Terms of U
         <message name="IDS_PAGE_IS_DISTILLED" desc="Speedreader is enabled on this page">
           in Speedreader
         </message>
+        <message name="IDS_SPEEDREADER_ICON_TURN_OFF_READER_MODE" desc="Accessible text shown when a page is in Reader Mode">
+          Turn off reader mode
+        </message>
+        <message name="IDS_SPEEDREADER_ICON_TURN_ON_READER_MODE" desc="Accessible text shown when a page can be distilled">
+          Turn on reader mode
+        </message>
+        <message name="IDS_SPEEDREADER_ICON_SPEEDREADER_SETTINGS" desc="Accessible text shown when a page is in Speedreader Mode">
+          Speedreader settings
+        </message>
       </if>
 
       <!-- Stats -->

browser/speedreader/speedreader_tab_helper.h

@@ -24,6 +24,9 @@ class SpeedreaderTabHelper
       public content::WebContentsUserData<SpeedreaderTabHelper> {
  public:
   enum class DistillState {
+    // Used as an initialization state
+    kUnknown,
+
     // The web contents is not distilled
     kNone,
 

browser/ui/views/speedreader/speedreader_icon_view.cc

@@ -27,8 +27,6 @@
 #include "ui/views/animation/ink_drop_host_view.h"
 #include "ui/views/animation/ink_drop_state.h"
 
-using DistillState = speedreader::SpeedreaderTabHelper::DistillState;
-
 SpeedreaderIconView::SpeedreaderIconView(
     CommandUpdater* command_updater,
     IconLabelBubbleView::Delegate* icon_label_bubble_delegate,
@@ -58,15 +56,8 @@ void SpeedreaderIconView::UpdateImpl() {
   if (ink_drop()->GetHighlighted() && !IsBubbleShowing())
     ink_drop()->AnimateToState(views::InkDropState::HIDDEN, nullptr);
 
-  auto* tab_helper =
-      speedreader::SpeedreaderTabHelper::FromWebContents(contents);
-  if (!tab_helper) {
-    SetVisible(false);
-    return;
-  }
-
   const ui::ThemeProvider* theme_provider = GetThemeProvider();
-  const DistillState state = tab_helper->PageDistillState();
+  const DistillState state = GetDistillState();
   const bool is_distilled =
       speedreader::SpeedreaderTabHelper::PageStateIsDistilled(state);
 
@@ -99,16 +90,7 @@ void SpeedreaderIconView::UpdateImpl() {
 }
 
 const gfx::VectorIcon& SpeedreaderIconView::GetVectorIcon() const {
-  auto* web_contents = GetWebContents();
-  if (!web_contents)
-    return kBraveReaderModeIcon;
-
-  auto* tab_helper =
-      speedreader::SpeedreaderTabHelper::FromWebContents(web_contents);
-  if (!tab_helper)
-    return kBraveReaderModeIcon;
-
-  const DistillState state = tab_helper->PageDistillState();
+  const DistillState state = GetDistillState();
   if (state == DistillState::kSpeedreaderMode ||
       state == DistillState::kSpeedreaderOnDisabledPage) {
     return kBraveSpeedreaderModeIcon;
@@ -118,8 +100,20 @@ const gfx::VectorIcon& SpeedreaderIconView::GetVectorIcon() const {
 }
 
 std::u16string SpeedreaderIconView::GetTextForTooltipAndAccessibleName() const {
-  return l10n_util::GetStringUTF16(GetActive() ? IDS_EXIT_DISTILLED_PAGE
-                                               : IDS_DISTILL_PAGE);
+  int id;
+  const DistillState state = GetDistillState();
+  switch (state) {
+    case DistillState::kSpeedreaderMode:
+    case DistillState::kSpeedreaderOnDisabledPage:
+      id = IDS_SPEEDREADER_ICON_SPEEDREADER_SETTINGS;
+      break;
+    case DistillState::kReaderMode:
+      id = IDS_SPEEDREADER_ICON_TURN_OFF_READER_MODE;
+      break;
+    default:
+      id = IDS_SPEEDREADER_ICON_TURN_ON_READER_MODE;
+  }
+  return l10n_util::GetStringUTF16(id);
 }
 
 void SpeedreaderIconView::OnExecuting(
@@ -139,5 +133,17 @@ views::BubbleDialogDelegate* SpeedreaderIconView::GetBubble() const {
       tab_helper->speedreader_bubble_view());
 }
 
+DistillState SpeedreaderIconView::GetDistillState() const {
+  DistillState state = DistillState::kUnknown;
+  auto* web_contents = GetWebContents();
+  if (web_contents) {
+    auto* tab_helper =
+        speedreader::SpeedreaderTabHelper::FromWebContents(web_contents);
+    if (tab_helper)
+      state = tab_helper->PageDistillState();
+  }
+  return state;
+}
+
 BEGIN_METADATA(SpeedreaderIconView, PageActionIconView)
 END_METADATA

browser/ui/views/speedreader/speedreader_icon_view.h

@@ -6,10 +6,13 @@
 #ifndef BRAVE_BROWSER_UI_VIEWS_SPEEDREADER_SPEEDREADER_ICON_VIEW_H_
 #define BRAVE_BROWSER_UI_VIEWS_SPEEDREADER_SPEEDREADER_ICON_VIEW_H_
 
+#include "brave/browser/speedreader/speedreader_tab_helper.h"
 #include "chrome/browser/ui/views/page_action/page_action_icon_view.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "ui/base/metadata/metadata_header_macros.h"
 
+using DistillState = speedreader::SpeedreaderTabHelper::DistillState;
+
 namespace content {
 class NavigationHandle;
 }  // namespace content
@@ -34,6 +37,8 @@ class SpeedreaderIconView : public PageActionIconView {
   views::BubbleDialogDelegate* GetBubble() const override;
   std::u16string GetTextForTooltipAndAccessibleName() const override;
   void UpdateImpl() override;
+ private:
+  DistillState GetDistillState() const;
 };
 
 #endif  // BRAVE_BROWSER_UI_VIEWS_SPEEDREADER_SPEEDREADER_ICON_VIEW_H_