Introduce incremental text search

It is quite rough and should be refined, but as with most of the other
features, introducing it at this stage primarily to ensure that it
will not require major changes.

1 files changed, 54 insertions, 3 deletions

diff --git a/src/main.c b/src/main.c
index 65adadf..0603b03 100644
--- a/src/main.c
+++ b/src/main.c
@@ -41,19 +41,70 @@ key_press_event_cb (GtkWidget *widget, GdkEventKey *ev, GtkStack *tabs)
       return TRUE;
     } else if (ev->keyval == GDK_KEY_w) {
       GtkWidget *current_tab = gtk_stack_get_visible_child(tabs);
-      if (current_tab) {
+      if (current_tab != NULL) {
         gtk_widget_destroy(current_tab);
+        return TRUE;
+      }
+    } else if (ev->keyval == GDK_KEY_s) {
+      GtkWidget *current_tab = gtk_stack_get_visible_child(tabs);
+      if (current_tab != NULL) {
+        BrowserBox *bb = BROWSER_BOX(current_tab);
+        if (bb->search_state == SEARCH_INACTIVE) {
+          bb->search_state = SEARCH_FORWARD;
+          browser_box_display_search_status(bb);
+        } else if (bb->search_state == SEARCH_FORWARD) {
+          TextSearchState *tss = &(DOCUMENT_BOX(bb->builder_state->docbox)->search);
+          if (tss->state == FOUND) {
+            tss->start++;
+          }
+          document_box_find(DOCUMENT_BOX(bb->builder_state->docbox), bb->search_string);
+          browser_box_display_search_status(bb);
+        }
+        return TRUE;
+      }
+    } else if (ev->keyval == GDK_KEY_g) {
+      GtkWidget *current_tab = gtk_stack_get_visible_child(tabs);
+      if (current_tab != NULL) {
+        BrowserBox *bb = BROWSER_BOX(current_tab);
+        if (bb->search_state != SEARCH_INACTIVE) {
+          bb->search_state = SEARCH_INACTIVE;
+          bb->search_string[0] = 0;
+          browser_box_set_status(bb, "Interrupted");
+        }
       }
-      return TRUE;
     }
   }
   GtkWidget *current_tab = gtk_stack_get_visible_child(tabs);
   if (current_tab != NULL) {
     BrowserBox *bb = BROWSER_BOX(current_tab);
-    if (ev->keyval == GDK_KEY_Back || ev->keyval == GDK_KEY_BackSpace) {
+    if (ev->keyval == GDK_KEY_Back ||
+        (bb->search_state == SEARCH_INACTIVE &&
+         ev->keyval == GDK_KEY_BackSpace)) {
       return history_back(bb);
     } else if (ev->keyval == GDK_KEY_Forward) {
       return history_forward(bb);
+    } else if (bb->search_state != SEARCH_INACTIVE &&
+               bb->builder_state != NULL &&
+               bb->builder_state->docbox != NULL) {
+      size_t ss_len = strlen(bb->search_string);
+      DocumentBox *db = DOCUMENT_BOX(bb->builder_state->docbox);
+      if (ev->keyval == GDK_KEY_BackSpace && ss_len > 0) {
+        /* todo: this won't work well for unicode */
+        bb->search_string[ss_len - 1] = 0;
+        document_box_find(db, bb->search_string);
+        browser_box_display_search_status(bb);
+        return TRUE;
+      }
+      if (ss_len + 4 < MAX_SEARCH_STRING_LEN) {
+        gunichar c = gdk_keyval_to_unicode(ev->keyval);
+        gint c_len = g_unichar_to_utf8(c, bb->search_string + ss_len);
+        if (c_len > 0) {
+          bb->search_string[ss_len + c_len] = 0;
+          browser_box_display_search_status(bb);
+          document_box_find(db, bb->search_string);
+          return TRUE;
+        }
+      }
     }
   }
   return FALSE;