Search engine queries via the navbar

Any text that doesn't look like a URL is passed onto the configured search URL as a query string.

IssueID #157

9 files changed, 54 insertions, 6 deletions

diff --git a/res/about/version.gmi b/res/about/version.gmi
index c255e533..ba94f7e2 100644
--- a/res/about/version.gmi
+++ b/res/about/version.gmi
@@ -8,7 +8,9 @@
 
 ## 1.2
 * Help is opened on first run instead of the "About Lagrange" page to make it easier to discover important Gemini links like the FAQ.
+* Added search engine support: non-URL text entered in the navbar is passed onto the configured search query URL (Preferences > Network).
 * Short pages are centered vertically on actual page content excluding the top banner.
+* Added user preference for aligning all pages to the top of the window.
 * Shift+Insert can be used for pasting clipboard contents into input fields.
 * Added keybinding (F11) for toggling fullscreen mode. On macOS, the shortcut is ⌃⌘F as before.
 * Added keybinding for finding text on page.
diff --git a/src/app.c b/src/app.c
index 3d3dc6f8..b5eb5688 100644
--- a/src/app.c
+++ b/src/app.c
@@ -227,6 +227,7 @@ static iString *serializePrefs_App_(const iApp *d) {
     appendFormat_String(str, "proxy.gopher address:%s\n", cstr_String(&d->prefs.gopherProxy));
     appendFormat_String(str, "proxy.http address:%s\n", cstr_String(&d->prefs.httpProxy));
     appendFormat_String(str, "downloads path:%s\n", cstr_String(&d->prefs.downloadDir));
+    appendFormat_String(str, "searchurl address:%s\n", cstr_String(&d->prefs.searchUrl));
     return str;
 }
 
@@ -937,6 +938,8 @@ static iBool handlePrefsCommands_(iWidget *d, const char *cmd) {
                          isSelected_Widget(findChild_Widget(d, "prefs.ostheme")));
         postCommandf_App("decodeurls arg:%d",
                          isSelected_Widget(findChild_Widget(d, "prefs.decodeurls")));
+        postCommandf_App("searchurl address:%s",
+                         cstr_String(text_InputWidget(findChild_Widget(d, "prefs.searchurl"))));
         postCommandf_App("cachesize.set arg:%d",
                          toInt_String(text_InputWidget(findChild_Widget(d, "prefs.cachesize"))));
         postCommandf_App("proxy.gemini address:%s",
@@ -1122,6 +1125,15 @@ iBool willUseProxy_App(const iRangecc scheme) {
     return schemeProxy_App(scheme) != NULL;
 }
 
+const iString *searchQueryUrl_App(const iString *queryStringUnescaped) {
+    iApp *d = &app_;
+    if (isEmpty_String(&d->prefs.searchUrl)) {
+        return collectNew_String();
+    }
+    const iString *escaped = urlEncode_String(queryStringUnescaped);
+    return collectNewFormat_String("%s?%s", cstr_String(&d->prefs.searchUrl), cstr_String(escaped));
+}
+
 iBool handleCommand_App(const char *cmd) {
     iApp *d = &app_;
     if (equal_Command(cmd, "config.error")) {
@@ -1292,6 +1304,10 @@ iBool handleCommand_App(const char *cmd) {
         }
         return iTrue;
     }
+    else if (equal_Command(cmd, "searchurl")) {
+        setCStr_String(&d->prefs.searchUrl, suffixPtr_Command(cmd, "address"));
+        return iTrue;
+    }
     else if (equal_Command(cmd, "proxy.gemini")) {
         setCStr_String(&d->prefs.geminiProxy, suffixPtr_Command(cmd, "address"));
         return iTrue;
@@ -1474,6 +1490,7 @@ iBool handleCommand_App(const char *cmd) {
         setText_InputWidget(findChild_Widget(dlg, "prefs.cachesize"),
                             collectNewFormat_String("%d", d->prefs.maxCacheSize));
         setToggle_Widget(findChild_Widget(dlg, "prefs.decodeurls"), d->prefs.decodeUserVisibleURLs);
+        setText_InputWidget(findChild_Widget(dlg, "prefs.searchurl"), &d->prefs.searchUrl);
         setText_InputWidget(findChild_Widget(dlg, "prefs.proxy.gemini"), &d->prefs.geminiProxy);
         setText_InputWidget(findChild_Widget(dlg, "prefs.proxy.gopher"), &d->prefs.gopherProxy);
         setText_InputWidget(findChild_Widget(dlg, "prefs.proxy.http"), &d->prefs.httpProxy);
diff --git a/src/app.h b/src/app.h
index efaf0a3e..54c60d10 100644
--- a/src/app.h
+++ b/src/app.h
@@ -75,6 +75,7 @@ iBool               forceSoftwareRender_App(void);
 enum iColorTheme    colorTheme_App      (void);
 const iString *     schemeProxy_App     (iRangecc scheme);
 iBool               willUseProxy_App    (const iRangecc scheme);
+const iString *     searchQueryUrl_App  (const iString *queryStringUnescaped);
 
 typedef void (*iTickerFunc)(iAny *);
 
diff --git a/src/gmutil.c b/src/gmutil.c
index 0e0cccc5..32bf356f 100644
--- a/src/gmutil.c
+++ b/src/gmutil.c
@@ -272,6 +272,21 @@ const iString *absoluteUrl_String(const iString *d, const iString *urlMaybeRelat
     return absolute;
 }
 
+iBool isLikelyUrl_String(const iString *d) {
+    /* Guess whether a human intends the string to be an URL. This is supposed to be fuzzy;
+       not completely per-spec: a) begins with a scheme; b) has something that looks like a
+       hostname */
+    iRegExp *pattern = new_RegExp("^([a-z]+:)?//.*|"
+                                  "^(//)?([^/?#: ]+)([/?#:].*)$|"
+                                  "^(\\w+(\\.\\w+)+|localhost)$",
+                                  caseInsensitive_RegExpOption);
+    iRegExpMatch m;
+    init_RegExpMatch(&m);
+    const iBool likelyUrl = matchString_RegExp(pattern, d, &m);
+    iRelease(pattern);
+    return likelyUrl;
+}
+
 static iBool equalPuny_(const iString *d, iRangecc orig) {
     if (!endsWith_String(d, "-")) {
         return iFalse; /* This is a sufficient condition? */
diff --git a/src/gmutil.h b/src/gmutil.h
index 1caf2445..26385c02 100644
--- a/src/gmutil.h
+++ b/src/gmutil.h
@@ -104,6 +104,7 @@ void            init_Url                (iUrl *, const iString *text);
 iRangecc        urlScheme_String        (const iString *);
 iRangecc        urlHost_String          (const iString *);
 const iString * absoluteUrl_String      (const iString *, const iString *urlMaybeRelative);
+iBool           isLikelyUrl_String      (const iString *);
 void            punyEncodeUrlHost_String(iString *);
 void            stripDefaultUrlPort_String(iString *);
 const iString * urlFragmentStripped_String(const iString *);
diff --git a/src/prefs.c b/src/prefs.c
index a8f34b02..f9186ab3 100644
--- a/src/prefs.c
+++ b/src/prefs.c
@@ -51,9 +51,11 @@ void init_Prefs(iPrefs *d) {
     init_String(&d->gopherProxy);
     init_String(&d->httpProxy);
     init_String(&d->downloadDir);
+    initCStr_String(&d->searchUrl, "gemini://gus.guru/search");
 }
 
 void deinit_Prefs(iPrefs *d) {
+    deinit_String(&d->searchUrl);
     deinit_String(&d->geminiProxy);
     deinit_String(&d->gopherProxy);
     deinit_String(&d->httpProxy);
diff --git a/src/prefs.h b/src/prefs.h
index dcda695f..1889c338 100644
--- a/src/prefs.h
+++ b/src/prefs.h
@@ -48,6 +48,7 @@ struct Impl_Prefs {
     iBool            hoverLink;
     iBool            smoothScrolling;
     iBool            loadImageInsteadOfScrolling;
+    iString          searchUrl;
     /* Network */
     iBool            decodeUserVisibleURLs;
     int              maxCacheSize; /* MB */
diff --git a/src/ui/util.c b/src/ui/util.c
index 9a98d07b..553d9078 100644
--- a/src/ui/util.c
+++ b/src/ui/util.c
@@ -1175,6 +1175,10 @@ iWidget *makePreferences_Widget(void) {
     }
     /* Network. */ {
         appendTwoColumnPage_(tabs, "Network", '5', &headings, &values);
+        addChild_Widget(headings, iClob(makeHeading_Widget("Search URL:")));
+        setId_Widget(addChild_Widget(values, iClob(new_InputWidget(0))), "prefs.searchurl");
+        addChild_Widget(headings, iClob(makeHeading_Widget("Decode URLs:")));
+        addChild_Widget(values, iClob(makeToggle_Widget("prefs.decodeurls")));
         addChild_Widget(headings, iClob(makeHeading_Widget("Cache size:")));
         iWidget *cacheGroup = new_Widget(); {
             iInputWidget *cache = new_InputWidget(4);
@@ -1183,8 +1187,6 @@ iWidget *makePreferences_Widget(void) {
             addChildFlags_Widget(cacheGroup, iClob(new_LabelWidget("MB", NULL)), frameless_WidgetFlag);
         }
         addChildFlags_Widget(values, iClob(cacheGroup), arrangeHorizontal_WidgetFlag | arrangeSize_WidgetFlag);
-        addChild_Widget(headings, iClob(makeHeading_Widget("Decode URLs:")));
-        addChild_Widget(values, iClob(makeToggle_Widget("prefs.decodeurls")));
         makeTwoColumnHeading_("PROXIES", headings, values);
         addChild_Widget(headings, iClob(makeHeading_Widget("Gemini proxy:")));
         setId_Widget(addChild_Widget(values, iClob(new_InputWidget(0))), "prefs.proxy.gemini");
@@ -1201,6 +1203,7 @@ iWidget *makePreferences_Widget(void) {
     resizeToLargestPage_Widget(tabs);
     arrange_Widget(dlg);
     /* Set input field sizes. */ {
+        expandInputFieldWidth_(findChild_Widget(tabs, "prefs.searchurl"));
         expandInputFieldWidth_(findChild_Widget(tabs, "prefs.downloads"));
         expandInputFieldWidth_(findChild_Widget(tabs, "prefs.proxy.gemini"));
         expandInputFieldWidth_(findChild_Widget(tabs, "prefs.proxy.gopher"));
diff --git a/src/ui/window.c b/src/ui/window.c
index cd813acb..563d57ae 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -47,6 +47,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 
 #include <the_Foundation/file.h>
 #include <the_Foundation/path.h>
+#include <the_Foundation/regexp.h>
 #include <SDL_hints.h>
 #include <SDL_timer.h>
 #include <SDL_syswm.h>
@@ -419,9 +420,14 @@ static iBool handleNavBarCommands_(iWidget *navBar, const char *cmd) {
             !isFocused_Widget(findWidget_App("lookup"))) {
             iString *newUrl = copy_String(text_InputWidget(url));
             trim_String(newUrl);
-            postCommandf_App(
-                "open url:%s",
-                cstr_String(absoluteUrl_String(&iStringLiteral(""), collect_String(newUrl))));
+            if (!isEmpty_String(&prefs_App()->searchUrl) && !isLikelyUrl_String(newUrl)) {
+                postCommandf_App("open url:%s", cstr_String(searchQueryUrl_App(newUrl)));
+            }
+            else {
+                postCommandf_App(
+                    "open url:%s",
+                    cstr_String(absoluteUrl_String(&iStringLiteral(""), collect_String(newUrl))));
+            }
             return iTrue;
         }
     }
@@ -1168,7 +1174,7 @@ static iBool handleWindowEvent_Window_(iWindow *d, const SDL_WindowEvent *ev) {
             //updateRootSize_Window_(d, iTrue);
             invalidate_Window_(d);
             d->isMinimized = iFalse;
-            //printf("restored %d\n", snap_Window(d)); fflush(stdout);
+            printf("restored %d\n", snap_Window(d)); fflush(stdout);
             return iTrue;
         case SDL_WINDOWEVENT_MINIMIZED:
             d->isMinimized = iTrue;