[evolution] Bug 788823 - Link wrapping breaks paragraph text incorrectly

[Milan Crha <mcrha src gnome org>]

commit 7ef636dd6a674f88365b669b90cb27275bd8794a
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jan 29 17:29:15 2018 +0100

    Bug 788823 - Link wrapping breaks paragraph text incorrectly

 data/webview-print.css           |    2 +-
 data/webview.css                 |    2 +-
 src/web-extensions/e-dom-utils.c |   73 +++++++++++++++++++++++++++++++++++++-
 3 files changed, 74 insertions(+), 3 deletions(-)
---
diff --git a/data/webview-print.css b/data/webview-print.css
index 499f6e3..c215bc7 100644
--- a/data/webview-print.css
+++ b/data/webview-print.css
@@ -41,7 +41,7 @@ th {
         margin: 8px;
 }
 
-a {
+a.evo-awrap {
        white-space:normal;
        word-break:break-all;
 }
diff --git a/data/webview.css b/data/webview.css
index 28e98f3..1481ad9 100644
--- a/data/webview.css
+++ b/data/webview.css
@@ -80,7 +80,7 @@ object { /* GtkWidgets */
   font-weight: bold;
 }
 
-a {
+a.evo-awrap {
   white-space: normal;
   word-break: break-all;
 }
diff --git a/src/web-extensions/e-dom-utils.c b/src/web-extensions/e-dom-utils.c
index 863278f..171f288 100644
--- a/src/web-extensions/e-dom-utils.c
+++ b/src/web-extensions/e-dom-utils.c
@@ -1011,6 +1011,75 @@ dom_window_resize_cb (WebKitDOMDOMWindow *dom_window,
                e_dom_resize_document_content_to_preview_width (document);
 }
 
+static gboolean
+e_dom_text_requires_wrap (const gchar *text)
+{
+       gint cnt;
+
+       if (!text || !*text)
+               return FALSE;
+
+       for (cnt = -1; *text; text++) {
+               cnt++;
+
+               if (g_ascii_isspace (*text))
+                       cnt = -1;
+               else if (cnt > 80)
+                       return TRUE;
+       }
+
+       return FALSE;
+}
+
+static void
+e_dom_wrap_long_anchors (WebKitDOMDocument *document)
+{
+       WebKitDOMHTMLCollection *frames;
+       WebKitDOMHTMLCollection *anchors;
+       WebKitDOMNode *node;
+       gint ii, length;
+
+       if (!document || !WEBKIT_DOM_IS_HTML_DOCUMENT (document))
+               return;
+
+       anchors = webkit_dom_document_get_elements_by_tag_name_as_html_collection (document, "a");
+       length = webkit_dom_html_collection_get_length (anchors);
+
+       for (ii = 0; ii < length; ii++) {
+               node = webkit_dom_html_collection_item (anchors, ii);
+
+               if (WEBKIT_DOM_IS_HTML_ANCHOR_ELEMENT (node)) {
+                       gchar *inner_text;
+
+                       inner_text = webkit_dom_html_element_get_inner_text (WEBKIT_DOM_HTML_ELEMENT (node));
+
+                       if (e_dom_text_requires_wrap (inner_text))
+                               element_add_class (WEBKIT_DOM_ELEMENT (node), "evo-awrap");
+                       else
+                               element_remove_class (WEBKIT_DOM_ELEMENT (node), "evo-awrap");
+
+                       g_free (inner_text);
+               }
+       }
+
+       g_object_unref (anchors);
+
+       frames = webkit_dom_document_get_elements_by_tag_name_as_html_collection (document, "iframe");
+       length = webkit_dom_html_collection_get_length (frames);
+
+       for (ii = 0; ii < length; ii++) {
+               WebKitDOMDocument *iframe_document;
+
+               node = webkit_dom_html_collection_item (frames, ii);
+               iframe_document = webkit_dom_html_iframe_element_get_content_document 
(WEBKIT_DOM_HTML_IFRAME_ELEMENT (node));
+
+               if (iframe_document)
+                       e_dom_wrap_long_anchors (iframe_document);
+       }
+
+       g_object_unref (frames);
+}
+
 void
 e_dom_utils_e_mail_display_bind_dom (WebKitDOMDocument *document,
                                      GDBusConnection *connection)
@@ -1046,9 +1115,11 @@ e_dom_utils_e_mail_display_bind_dom (WebKitDOMDocument *document,
        e_dom_utils_add_css_rule_into_style_sheet (
                document,
                "-e-mail-formatter-style-sheet",
-               "a",
+               "a.evo-awrap",
                "white-space: normal; word-break: break-all;");
 
+       e_dom_wrap_long_anchors (document);
+
        e_dom_resize_document_content_to_preview_width (document);
 }