6 files changed, 125 insertions, 23 deletions

diff --git a/src/app.c b/src/app.c
index 05038a4b..4c9a3477 100644
--- a/src/app.c
+++ b/src/app.c
@@ -28,6 +28,21 @@
 #endif
 
 iDeclareType(App)
+iDeclareType(HistoryItem)
+
+struct Impl_HistoryItem {
+    iTime   when;
+    iString url;
+};
+
+void init_HistoryItem(iHistoryItem *d) {
+    initCurrent_Time(&d->when);
+    init_String(&d->url);
+}
+
+void deinit_HistoryItem(iHistoryItem *d) {
+    deinit_String(&d->url);
+}
 
 #if defined (iPlatformApple)
 static const char *dataDir_App_        = "~/Library/Application Support/fi.skyjake.Lagrange";
@@ -40,12 +55,16 @@ static const char *dataDir_App_        = "~/.config/lagrange";
 #endif
 static const char *prefsFileName_App_  = "prefs.cfg";
 
+static const int HISTORY_MAX = 100;
+
 struct Impl_App {
     iCommandLine args;
     iBool        running;
     iWindow *    window;
     iSortedArray tickers;
     iBool        pendingRefresh;
+    iArray       history;
+    size_t       historyPos; /* zero at the latest item */
     /* Preferences: */
     iBool        retainWindowSize;
     float        uiScale;
@@ -131,9 +150,18 @@ static void savePrefs_App_(const iApp *d) {
     delete_String(cfg);
 }
 
+static void clearHistory_App_(iApp *d) {
+    iForEach(Array, i, &d->history) {
+        deinit_HistoryItem(i.value);
+    }
+    clear_Array(&d->history);
+}
+
 static void init_App_(iApp *d, int argc, char **argv) {
     init_CommandLine(&d->args, argc, argv);
     init_SortedArray(&d->tickers, sizeof(iTicker), cmp_Ticker_);
+    init_Array(&d->history, sizeof(iHistoryItem));
+    d->historyPos       = 0;
     d->running          = iFalse;
     d->window           = NULL;
     d->retainWindowSize = iTrue;
@@ -152,10 +180,12 @@ static void init_App_(iApp *d, int argc, char **argv) {
 
 static void deinit_App(iApp *d) {
     savePrefs_App_(d);
+    clearHistory_App_(d);
+    deinit_Array(&d->history);
     deinit_SortedArray(&d->tickers);
     delete_Window(d->window);
     d->window = NULL;
-    deinit_CommandLine(&d->args);
+    deinit_CommandLine(&d->args);    
 }
 
 const iString *execPath_App(void) {
@@ -302,12 +332,62 @@ static iBool handlePrefsCommands_(iWidget *d, const char *cmd) {
     return iFalse;
 }
 
+static iHistoryItem *historyItem_App_(iApp *d, size_t pos) {
+    if (isEmpty_Array(&d->history)) return NULL;
+    return &value_Array(&d->history, size_Array(&d->history) - 1 - pos, iHistoryItem);
+}
+
+static const iString *historyUrl_App_(iApp *d, size_t pos) {
+    const iHistoryItem *item = historyItem_App_(d, pos);
+    if (item) {
+        return &item->url;
+    }
+    return collectNew_String();
+}
+
+static void printHistory_App_(const iApp *d) {
+    iConstForEach(Array, i, &d->history) {
+        const size_t idx = index_ArrayConstIterator(&i);
+        printf("%s[%zu]: %s\n",
+               d->historyPos == size_Array(&d->history) - idx - 1 ? "->" : "  ",
+               idx,
+               cstr_String(&((const iHistoryItem *) i.value)->url));
+    }
+    fflush(stdout);
+}
+
 iBool handleCommand_App(const char *cmd) {
     iApp *d = &app_;
     iWidget *root = d->window->root;
     if (equal_Command(cmd, "open")) {
-        setUrl_DocumentWidget(findChild_Widget(root, "document"),
-                              collect_String(newCStr_String(valuePtr_Command(cmd, "url"))));
+        const iString *url = collect_String(newCStr_String(valuePtr_Command(cmd, "url")));
+        if (!argLabel_Command(cmd, "history")) {
+            if (argLabel_Command(cmd, "redirect")) {
+                /* Update in the history. */
+                iHistoryItem *item = historyItem_App_(d, d->historyPos);
+                if (item) {
+                    set_String(&item->url, url);
+                }
+            }
+            else {
+                /* Cut the trailing history items. */
+                if (d->historyPos > 0) {
+                    for (size_t i = 0; i < d->historyPos - 1; i++) {
+                        deinit_HistoryItem(historyItem_App_(d, i));
+                    }
+                    removeN_Array(
+                        &d->history, size_Array(&d->history) - d->historyPos, iInvalidSize);
+                    d->historyPos = 0;
+                }
+                /* Insert new item. */
+                iHistoryItem item;
+                init_HistoryItem(&item);
+                set_String(&item.url, url);
+                pushBack_Array(&d->history, &item);
+            }
+        }
+        printHistory_App_(d);
+        setUrl_DocumentWidget(findChild_Widget(root, "document"), url);
     }
     else if (equal_Command(cmd, "quit")) {
         SDL_Event ev;
@@ -328,6 +408,26 @@ iBool handleCommand_App(const char *cmd) {
         const iInt2 pos = coord_Command(cmd);
         SDL_SetWindowPosition(d->window->win, pos.x, pos.y);
     }
+    else if (equal_Command(cmd, "document.changed")) {
+        /* TODO: Update current history item with this actual/redirected URL. */
+        return iFalse;
+    }
+    else if (equal_Command(cmd, "navigate.back")) {
+        if (d->historyPos < size_Array(&d->history) - 1) {
+            d->historyPos++;
+            postCommandf_App("open history:1 url:%s",
+                             cstr_String(historyUrl_App_(d, d->historyPos)));
+        }
+        return iTrue;
+    }
+    else if (equal_Command(cmd, "navigate.forward")) {
+        if (d->historyPos > 0) {
+            d->historyPos--;
+            postCommandf_App("open history:1 url:%s",
+                             cstr_String(historyUrl_App_(d, d->historyPos)));
+        }
+        return iTrue;
+    }
     else {
         return iFalse;
     }
diff --git a/src/gmdocument.c b/src/gmdocument.c
index 6fde864a..eb147925 100644
--- a/src/gmdocument.c
+++ b/src/gmdocument.c
@@ -133,15 +133,6 @@ static void clearLinks_GmDocument_(iGmDocument *d) {
 }
 
 static void doLayout_GmDocument_(iGmDocument *d) {
-    clear_Array(&d->layout);
-    clearLinks_GmDocument_(d);
-    if (d->size.x <= 0 || isEmpty_String(&d->source)) {
-        return;
-    }
-    iBool isPreformat = iFalse;
-    iInt2 pos = zero_I2();
-    const iRangecc content = range_String(&d->source);
-    iRangecc line = iNullRange;
     /* TODO: Collect these parameters into a GmTheme. */
     static const int fonts[max_GmLineType] = {
         paragraph_FontId,
@@ -152,17 +143,17 @@ static void doLayout_GmDocument_(iGmDocument *d) {
         header2_FontId,
         header3_FontId,
         regular_FontId,
-    };
+        };
     static const int colors[max_GmLineType] = {
         gray75_ColorId,
         gray75_ColorId,
-        orange_ColorId,
-        orange_ColorId,
+        cyan_ColorId,
+        gray75_ColorId,
         white_ColorId,
         white_ColorId,
         white_ColorId,
         white_ColorId,
-    };
+        };
     static const int indents[max_GmLineType] = {
         4, 10, 4, 10, 0, 0, 0, 0
     };
@@ -173,10 +164,19 @@ static void doLayout_GmDocument_(iGmDocument *d) {
         0.0f, 0.5f, 1.0f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f
     };
     static const char *bullet = "\u2022";
-    iRangecc preAltText = iNullRange;
-    enum iGmLineType prevType = text_GmLineType;
-    iBool isFirstText = iTrue;
-    int preFont = preformatted_FontId;
+    clear_Array(&d->layout);
+    clearLinks_GmDocument_(d);
+    if (d->size.x <= 0 || isEmpty_String(&d->source)) {
+        return;
+    }
+    const iRangecc   content     = range_String(&d->source);
+    iInt2            pos         = zero_I2();
+    iRangecc         line        = iNullRange;
+    iRangecc         preAltText  = iNullRange;
+    enum iGmLineType prevType    = text_GmLineType;
+    iBool            isPreformat = iFalse;
+    iBool            isFirstText = iTrue;
+    int              preFont     = preformatted_FontId;
     while (nextSplit_Rangecc(&content, "\n", &line)) {
         iGmRun run;
         run.color = white_ColorId;
diff --git a/src/ui/documentwidget.c b/src/ui/documentwidget.c
index 3bb66be6..4cd0ac18 100644
--- a/src/ui/documentwidget.c
+++ b/src/ui/documentwidget.c
@@ -247,7 +247,7 @@ static void checkResponseCode_DocumentWidget_(iDocumentWidget *d) {
         switch (status_GmRequest(d->request)) {
             case redirectTemporary_GmStatusCode:
             case redirectPermanent_GmStatusCode:
-                postCommandf_App("open url:%s", cstr_String(meta_GmRequest(d->request)));
+                postCommandf_App("open redirect:1 url:%s", cstr_String(meta_GmRequest(d->request)));
                 iReleasePtr(&d->request);
                 break;
             default:
diff --git a/src/ui/scrollwidget.c b/src/ui/scrollwidget.c
index 1961677b..65b20a28 100644
--- a/src/ui/scrollwidget.c
+++ b/src/ui/scrollwidget.c
@@ -115,7 +115,7 @@ static void draw_ScrollWidget_(const iScrollWidget *d) {
         iPaint p;
         init_Paint(&p);
         drawRect_Paint(&p, bounds, black_ColorId);
-        fillRect_Paint(&p, shrunk_Rect(thumbRect_ScrollWidget_(d), one_I2()),
+        fillRect_Paint(&p, shrunk_Rect(thumbRect_ScrollWidget_(d), init1_I2(gap_UI / 2)),
                        isPressed ? orange_ColorId : gray50_ColorId);
     }
 }
diff --git a/src/ui/widget.c b/src/ui/widget.c
index 86d2e195..69509e33 100644
--- a/src/ui/widget.c
+++ b/src/ui/widget.c
@@ -74,6 +74,7 @@ void destroy_Widget(iWidget *d) {
         rootData_.pendingDestruction = new_PtrSet();
     }
     insert_PtrSet(rootData_.pendingDestruction, d);
+    postRefresh_App();
 }
 
 void setId_Widget(iWidget *d, const char *id) {
@@ -449,6 +450,7 @@ iAny *removeChild_Widget(iWidget *d, iAnyObject *child) {
     }
     iAssert(found);
     ((iWidget *) child)->parent = NULL;
+    postRefresh_App();
     return child;
 }
 
diff --git a/src/ui/window.c b/src/ui/window.c
index 2d030dcc..896b1e66 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -86,7 +86,7 @@ static iBool handleNavBarCommands_(iWidget *navBar, const char *cmd) {
         iInputWidget *url = findWidget_App("url");
         setTextCStr_InputWidget(url, valuePtr_Command(cmd, "url"));
         setTitle_Window(get_Window(), text_InputWidget(url));
-        return iTrue;
+        return iFalse;
     }
     return iFalse;
 }