From 4108d5b0154775e2bf2c3af5003cf840675d789a Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Sat, 22 May 2021 08:19:00 +0300
Subject: DocumentWidget: Working on footer button positioning

---
 src/ui/documentwidget.c | 14 +++++++++++---
 src/ui/widget.c         |  4 ++++
 src/ui/widget.h         |  1 +
 3 files changed, 16 insertions(+), 3 deletions(-)

(limited to 'src/ui')

diff --git a/src/ui/documentwidget.c b/src/ui/documentwidget.c
index e13f8da9..b6f9298c 100644
--- a/src/ui/documentwidget.c
+++ b/src/ui/documentwidget.c
@@ -503,7 +503,7 @@ static iRect documentBounds_DocumentWidget_(const iDocumentWidget *d) {
         rect.size.y -= margin;
     }
     if (d->flags & centerVertically_DocumentWidgetFlag) {
-        const iInt2 docSize = size_GmDocument(d->doc);
+        const iInt2 docSize = addY_I2(size_GmDocument(d->doc), height_Widget(d->footerButtons));
         if (docSize.y < rect.size.y) {
             /* Center vertically if short. There is one empty paragraph line's worth of margin
                between the banner and the page contents. */
@@ -583,7 +583,8 @@ static float normScrollPos_DocumentWidget_(const iDocumentWidget *d) {
 static int scrollMax_DocumentWidget_(const iDocumentWidget *d) {
     const iWidget *w = constAs_Widget(d);
     int sm = size_GmDocument(d->doc).y - height_Rect(bounds_Widget(w)) +
-             (hasSiteBanner_GmDocument(d->doc) ? 1 : 2) * d->pageMargin * gap_UI;
+             (hasSiteBanner_GmDocument(d->doc) ? 1 : 2) * d->pageMargin * gap_UI +
+             height_Widget(d->footerButtons);
     if (d->phoneToolbar) {
         sm += size_Root(w->root).y -
               top_Rect(boundsWithoutVisualOffset_Widget(d->phoneToolbar));
@@ -1040,10 +1041,12 @@ static void makeFooterButtons_DocumentWidget_(iDocumentWidget *d, const iMenuIte
         return;
     }
     d->footerButtons = new_Widget();
+    d->footerButtons->animOffsetRef = &d->scrollY.pos;
     setFlags_Widget(d->footerButtons,
                     unhittable_WidgetFlag | arrangeVertical_WidgetFlag |
                         resizeWidthOfChildren_WidgetFlag | arrangeHeight_WidgetFlag |
-                        fixedPosition_WidgetFlag | resizeToParentWidth_WidgetFlag,
+                        fixedPosition_WidgetFlag | resizeToParentWidth_WidgetFlag |
+                        moveToParentBottomEdge_WidgetFlag,
                     iTrue);
     setBackgroundColor_Widget(d->footerButtons, tmBannerBackground_ColorId);
     const iRect bounds = bounds_Widget(w);
@@ -1061,6 +1064,7 @@ static void makeFooterButtons_DocumentWidget_(iDocumentWidget *d, const iMenuIte
     }
     addChild_Widget(as_Widget(d), iClob(d->footerButtons));
     arrange_Widget(d->footerButtons);
+    arrange_Widget(w);
 }
 
 static void showErrorPage_DocumentWidget_(iDocumentWidget *d, enum iGmStatusCode code,
@@ -1440,6 +1444,8 @@ static void updateFromCachedResponse_DocumentWidget_(iDocumentWidget *d, float n
     delete_Gempub(d->sourceGempub);
     d->sourceGempub = NULL;
     reset_GmDocument(d->doc);
+    destroy_Widget(d->footerButtons);
+    d->footerButtons = NULL;
     resetWideRuns_DocumentWidget_(d);
     d->state = fetching_RequestState;
     /* Do the fetch. */ {
@@ -1718,6 +1724,8 @@ static void checkResponse_DocumentWidget_(iDocumentWidget *d) {
                 reset_GmDocument(d->doc); /* new content incoming */
                 delete_Gempub(d->sourceGempub);
                 d->sourceGempub = NULL;
+                destroy_Widget(d->footerButtons);
+                d->footerButtons = NULL;
                 resetWideRuns_DocumentWidget_(d);
                 updateDocument_DocumentWidget_(d, resp, iTrue);
                 break;
diff --git a/src/ui/widget.c b/src/ui/widget.c
index 5502cb8e..8d9c6f3b 100644
--- a/src/ui/widget.c
+++ b/src/ui/widget.c
@@ -59,6 +59,7 @@ void init_Widget(iWidget *d) {
     d->minSize        = zero_I2();
     d->sizeRef        = NULL;
     d->offsetRef      = NULL;
+    d->animOffsetRef  = NULL;
     d->bgColor        = none_ColorId;
     d->frameColor     = none_ColorId;
     init_Anim(&d->visualOffset, 0.0f);
@@ -769,6 +770,9 @@ static void applyVisualOffset_Widget_(const iWidget *d, iInt2 *pos) {
             pos->y += off;
         }
     }
+    if (d->animOffsetRef) {
+        pos->y -= value_Anim(d->animOffsetRef);
+    }
     if (d->flags & refChildrenOffset_WidgetFlag) {
         iConstForEach(ObjectList, i, children_Widget(d->offsetRef)) {
             const iWidget *child = i.object;
diff --git a/src/ui/widget.h b/src/ui/widget.h
index 79d45f23..8de62b7a 100644
--- a/src/ui/widget.h
+++ b/src/ui/widget.h
@@ -139,6 +139,7 @@ struct Impl_Widget {
     iInt2        minSize;
     iWidget *    sizeRef;
     iWidget *    offsetRef;
+    const iAnim *animOffsetRef;
     int          padding[4]; /* left, top, right, bottom */
     iAnim        visualOffset;
     int          bgColor;
-- 
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