From d5a87c08b3ed5521a21a72c048e5cf4db68314fa Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Tue, 15 Jun 2021 10:31:20 +0300
Subject: DocumentWidget: Caching error page documents

---
 src/gmdocument.c        |  4 ++++
 src/gmdocument.h        |  1 +
 src/history.c           |  1 +
 src/ui/documentwidget.c | 23 +++++++++++++++--------
 4 files changed, 21 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/gmdocument.c b/src/gmdocument.c
index 0ab09604..aa2baa4a 100644
--- a/src/gmdocument.c
+++ b/src/gmdocument.c
@@ -919,6 +919,10 @@ const iMedia *constMedia_GmDocument(const iGmDocument *d) {
     return d->media;
 }
 
+const iString *url_GmDocument(const iGmDocument *d) {
+    return &d->url;
+}
+
 #if 0
 void reset_GmDocument(iGmDocument *d) {
     clear_Media(d->media);
diff --git a/src/gmdocument.h b/src/gmdocument.h
index 221e5c00..831459d8 100644
--- a/src/gmdocument.h
+++ b/src/gmdocument.h
@@ -179,6 +179,7 @@ typedef void (*iGmDocumentRenderFunc)(void *, const iGmRun *);
 
 iMedia *        media_GmDocument            (iGmDocument *);
 const iMedia *  constMedia_GmDocument       (const iGmDocument *);
+const iString * url_GmDocument              (const iGmDocument *);
 
 void            render_GmDocument           (const iGmDocument *, iRangei visRangeY,
                                              iGmDocumentRenderFunc render, void *); /* includes partial overlaps */
diff --git a/src/history.c b/src/history.c
index c592838e..2cea393d 100644
--- a/src/history.c
+++ b/src/history.c
@@ -391,6 +391,7 @@ void setCachedDocument_History(iHistory *d, iGmDocument *doc, iBool openedFromSi
     lock_Mutex(d->mtx);
     iRecentUrl *item = mostRecentUrl_History(d);
     if (item) {
+        iAssert(equal_String(url_GmDocument(doc), &item->url));
         item->flags.openedFromSidebar = openedFromSidebar;
         if (item->cachedDoc != doc) {
             iRelease(item->cachedDoc);
diff --git a/src/ui/documentwidget.c b/src/ui/documentwidget.c
index 0fe8220e..599e7ef3 100644
--- a/src/ui/documentwidget.c
+++ b/src/ui/documentwidget.c
@@ -1042,7 +1042,10 @@ static void documentWasChanged_DocumentWidget_(iDocumentWidget *d) {
             d->flags |= otherRootByDefault_DocumentWidgetFlag;
         }
     }
-    showOrHidePinningIndicator_DocumentWidget_(d);    
+    showOrHidePinningIndicator_DocumentWidget_(d);
+    setCachedDocument_History(d->mod.history,
+                              d->doc, /* keeps a ref */
+                              (d->flags & openedFromSidebar_DocumentWidgetFlag) != 0);
 }
 
 void setSource_DocumentWidget(iDocumentWidget *d, const iString *source) {
@@ -1168,8 +1171,14 @@ static void showErrorPage_DocumentWidget_(iDocumentWidget *d, enum iGmStatusCode
                            { person_Icon " ${menu.identity.new}", newIdentity_KeyShortcut, "ident.new" } },
             2);
     }
-    setBanner_GmDocument(d->doc, useBanner ? bannerType_DocumentWidget_(d) : none_GmDocumentBanner);
-    setFormat_GmDocument(d->doc, gemini_SourceFormat);
+    /* Make a new document for the error page.*/ {
+        iGmDocument *errorDoc = new_GmDocument();
+        setUrl_GmDocument(errorDoc, d->mod.url);
+        setBanner_GmDocument(errorDoc, useBanner ? bannerType_DocumentWidget_(d) : none_GmDocumentBanner);
+        setFormat_GmDocument(errorDoc, gemini_SourceFormat);
+        replaceDocument_DocumentWidget_(d, errorDoc);
+        iRelease(errorDoc);
+    }
     translate_Lang(src);
     d->state = ready_RequestState;
     setSource_DocumentWidget(d, src);
@@ -1608,8 +1617,8 @@ static void updateFromCachedResponse_DocumentWidget_(iDocumentWidget *d, float n
         format_String(&d->sourceHeader, cstr_Lang("pageinfo.header.cached"));
         set_Block(&d->sourceContent, &resp->body);
         updateDocument_DocumentWidget_(d, resp, cachedDoc, iTrue);
-        setCachedDocument_History(d->mod.history, d->doc,
-                                  (d->flags & openedFromSidebar_DocumentWidgetFlag) != 0);
+//        setCachedDocument_History(d->mod.history, d->doc,
+//                                  (d->flags & openedFromSidebar_DocumentWidgetFlag) != 0);
     }
     d->state = ready_RequestState;
     postProcessRequestContent_DocumentWidget_(d, iTrue);
@@ -2705,8 +2714,6 @@ static iBool handleCommand_DocumentWidget_(iDocumentWidget *d, const char *cmd)
                 (startsWithCase_String(meta_GmRequest(d->request), "text/") ||
                  !cmp_String(&d->sourceMime, mimeType_Gempub))) {
                 setCachedResponse_History(d->mod.history, lockResponse_GmRequest(d->request));
-                setCachedDocument_History(d->mod.history, d->doc, /* keeps a ref */
-                                          (d->flags & openedFromSidebar_DocumentWidgetFlag) != 0);
                 unlockResponse_GmRequest(d->request);
             }
         }
@@ -4917,7 +4924,7 @@ void setRedirectCount_DocumentWidget(iDocumentWidget *d, int count) {
 
 void setOpenedFromSidebar_DocumentWidget(iDocumentWidget *d, iBool fromSidebar) {
     iChangeFlags(d->flags, openedFromSidebar_DocumentWidgetFlag, fromSidebar);
-    setCachedDocument_History(d->mod.history, d->doc, fromSidebar);
+//    setCachedDocument_History(d->mod.history, d->doc, fromSidebar);
 }
 
 iBool isRequestOngoing_DocumentWidget(const iDocumentWidget *d) {
-- 
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