EHTMLEditorView - Improve the writing into quoted content

After this change when we start writing into quoted content it will
automatically rewrap the paragraph and reinserts the quote marks if the
block format is set to Normal. Also when the caret is in the beginning
of the quoted line and BackSpace is pressed the quoted content is
tooked out from the quote and inserted into body.

1 files changed, 341 insertions, 77 deletions

diff --git a/e-util/e-html-editor-view.c b/e-util/e-html-editor-view.c
index 25b9bee34e..8467f12f70 100644
--- a/e-util/e-html-editor-view.c
+++ b/e-util/e-html-editor-view.c
@@ -83,6 +83,7 @@ struct _EHTMLEditorViewPrivate {
 	GSettings *aliasing_settings;
 
 	gboolean convertor_insert;
+	gboolean had_selection_before_key_press;
 
 	WebKitWebView *convertor_web_view;
 
@@ -404,6 +405,104 @@ e_html_editor_view_force_spell_check (EHTMLEditorView *view)
 	refresh_spell_check (view, TRUE);
 }
 
+static gint
+get_citation_level (WebKitDOMNode *node,
+                    gboolean set_plaintext_quoted)
+{
+	WebKitDOMNode *parent = node;
+	gint level = 0;
+
+	while (parent && !WEBKIT_DOM_IS_HTML_BODY_ELEMENT (parent)) {
+		if (WEBKIT_DOM_IS_HTML_QUOTE_ELEMENT (parent) &&
+		    webkit_dom_element_has_attribute (WEBKIT_DOM_ELEMENT (parent), "type")) {
+			level++;
+
+			if (set_plaintext_quoted) {
+				element_add_class (
+					WEBKIT_DOM_ELEMENT (parent),
+					"-x-evo-plaintext-quoted");
+			}
+		}
+
+		parent = webkit_dom_node_get_parent_node (parent);
+	}
+
+	return level;
+}
+
+static WebKitDOMElement *
+insert_new_line_into_citation (EHTMLEditorView *view,
+                               const gchar *html_to_insert)
+{
+	gboolean html_mode, ret_val;
+	EHTMLEditorSelection *selection;
+	WebKitDOMDocument *document;
+	WebKitDOMElement *element, *paragraph = NULL;
+	WebKitDOMNode *caret;
+
+	html_mode = e_html_editor_view_get_html_mode (view);
+	selection = e_html_editor_view_get_selection (view);
+
+	ret_val = e_html_editor_view_exec_command (
+		view, E_HTML_EDITOR_VIEW_COMMAND_INSERT_NEW_LINE_IN_QUOTED_CONTENT, NULL);
+
+	if (!ret_val)
+		return NULL;
+
+	document = webkit_web_view_get_dom_document (
+			WEBKIT_WEB_VIEW (view));
+
+	element = webkit_dom_document_query_selector (
+		document, "body>br", NULL);
+
+	if (!element)
+		return NULL;
+
+	if (!html_mode) {
+		WebKitDOMNode *next_sibling;
+
+		next_sibling = webkit_dom_node_get_next_sibling (
+			WEBKIT_DOM_NODE (element));
+
+		if (WEBKIT_DOM_IS_HTML_QUOTE_ELEMENT (next_sibling)) {
+			e_html_editor_view_quote_plain_text_element (
+				view, WEBKIT_DOM_ELEMENT (next_sibling));
+
+			e_html_editor_view_force_spell_check (view);
+		}
+	}
+
+	caret = e_html_editor_selection_get_caret_position_node (document);
+
+	paragraph = e_html_editor_selection_get_paragraph_element (
+		selection, document, -1, 0);
+
+	if (html_to_insert && *html_to_insert)
+		webkit_dom_html_element_set_inner_html (
+			WEBKIT_DOM_HTML_ELEMENT (paragraph),
+			html_to_insert,
+			NULL);
+	else
+		webkit_dom_html_element_set_inner_text (
+			WEBKIT_DOM_HTML_ELEMENT (paragraph),
+			UNICODE_ZERO_WIDTH_SPACE,
+			NULL);
+
+	webkit_dom_node_append_child (WEBKIT_DOM_NODE (paragraph), caret, NULL);
+
+	webkit_dom_node_insert_before (
+		webkit_dom_node_get_parent_node (WEBKIT_DOM_NODE (element)),
+		WEBKIT_DOM_NODE (paragraph),
+		WEBKIT_DOM_NODE (element),
+		NULL);
+
+	remove_node (WEBKIT_DOM_NODE (element));
+
+	e_html_editor_selection_restore_caret_position (selection);
+
+	return paragraph;
+}
+
 static void
 body_input_event_cb (WebKitDOMElement *element,
                      WebKitDOMEvent *event,
@@ -501,6 +600,128 @@ body_input_event_cb (WebKitDOMElement *element,
 				e_html_editor_view_get_selection (view));
 		}
 	}
+
+	/* Writing into quoted content */
+	if (!view->priv->html_mode && !view->priv->had_selection_before_key_press) {
+		gint citation_level, length, word_wrap_length;
+		EHTMLEditorSelection *selection;
+		WebKitDOMElement *element;
+		WebKitDOMDocument *document;
+		WebKitDOMNode *parent;
+
+		document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (view));
+
+		selection = e_html_editor_view_get_selection (view);
+		word_wrap_length = e_html_editor_selection_get_word_wrap_length (selection);
+
+		element = webkit_dom_document_query_selector (
+			document, "span#-x-evo-selection-start-marker", NULL);
+		if (element)
+			return;
+
+		e_html_editor_selection_save (selection);
+		element = webkit_dom_document_query_selector (
+			document, "span#-x-evo-selection-start-marker", NULL);
+
+		/* If the selection was not saved, move it into the first child of body */
+		if (!element) {
+			WebKitDOMHTMLElement *body;
+
+			body = webkit_dom_document_get_body (document);
+			element = webkit_dom_document_create_element (
+				document, "SPAN", NULL);
+			webkit_dom_element_set_id (
+				element, "-x-evo-selection-end-marker");
+			webkit_dom_node_insert_before (
+				webkit_dom_node_get_first_child (WEBKIT_DOM_NODE (body)),
+				WEBKIT_DOM_NODE (element),
+				webkit_dom_node_get_first_child (
+					webkit_dom_node_get_first_child (
+						WEBKIT_DOM_NODE (body))),
+				NULL);
+			element = webkit_dom_document_create_element (
+				document, "SPAN", NULL);
+			webkit_dom_element_set_id (
+				element, "-x-evo-selection-start-marker");
+			webkit_dom_node_insert_before (
+				webkit_dom_node_get_first_child (WEBKIT_DOM_NODE (body)),
+				WEBKIT_DOM_NODE (element),
+				webkit_dom_node_get_first_child (
+					webkit_dom_node_get_first_child (
+						WEBKIT_DOM_NODE (body))),
+				NULL);
+		}
+
+		/* We have to process elements only inside normal block */
+		parent = webkit_dom_node_get_parent_node (WEBKIT_DOM_NODE (element));
+		if (WEBKIT_DOM_IS_HTML_PRE_ELEMENT (parent)) {
+			e_html_editor_selection_restore (selection);
+			return;
+		}
+
+		citation_level = get_citation_level (WEBKIT_DOM_NODE (element), FALSE);
+		length = word_wrap_length - 2 * citation_level;
+
+		if (element && citation_level > 0) {
+			WebKitDOMElement *block;
+			gboolean remove_quoting = FALSE;
+
+			block = webkit_dom_node_get_parent_element (
+				WEBKIT_DOM_NODE (element));
+			if (webkit_dom_element_query_selector (
+				WEBKIT_DOM_ELEMENT (block), ".-x-evo-quoted", NULL)) {
+				WebKitDOMNode *prev_sibling;
+				WebKitDOMElement *selection_end_marker;
+
+				selection_end_marker = webkit_dom_document_query_selector (
+					document, "span#-x-evo-selection-end-marker", NULL);
+				prev_sibling = webkit_dom_node_get_previous_sibling (
+					WEBKIT_DOM_NODE (selection_end_marker));
+
+				if (WEBKIT_DOM_IS_ELEMENT (prev_sibling))
+					remove_quoting = element_has_class (
+						WEBKIT_DOM_ELEMENT (prev_sibling), "-x-evo-quoted");
+			}
+
+			if (element_has_class (block, "-x-evo-temp-text-wrapper"))
+				block = webkit_dom_node_get_parent_element (
+					WEBKIT_DOM_NODE (block));
+
+			/* Wrap and quote the line */
+			if (!remove_quoting) {
+				remove_quoting_from_element (block);
+
+				block = e_html_editor_selection_wrap_paragraph_length (
+					selection, block, length);
+				webkit_dom_node_normalize (WEBKIT_DOM_NODE (block));
+				block = e_html_editor_view_quote_plain_text_element (view, block);
+				element = webkit_dom_document_query_selector (
+					document, "span#-x-evo-selection-start-marker", NULL);
+				if (!element) {
+					WebKitDOMElement *marker;
+
+					marker = webkit_dom_document_create_element (
+						document, "SPAN", NULL);
+					webkit_dom_element_set_id (
+						marker, "-x-evo-selection-start-marker");
+					webkit_dom_node_append_child (
+						WEBKIT_DOM_NODE (block),
+						WEBKIT_DOM_NODE (marker),
+						NULL);
+					marker = webkit_dom_document_create_element (
+						document, "SPAN", NULL);
+					webkit_dom_element_set_id (
+						marker, "-x-evo-selection-end-marker");
+					webkit_dom_node_append_child (
+						WEBKIT_DOM_NODE (block),
+						WEBKIT_DOM_NODE (marker),
+						NULL);
+				}
+			}
+			e_html_editor_view_force_spell_check (view);
+		}
+		e_html_editor_selection_restore (selection);
+	}
 }
 
 static void
@@ -1713,56 +1934,6 @@ html_editor_view_button_release_event (GtkWidget *widget,
 }
 
 static gboolean
-insert_new_line_into_citation (EHTMLEditorView *view)
-{
-	EHTMLEditorSelection *selection;
-	gboolean html_mode, ret_val;
-
-	html_mode = e_html_editor_view_get_html_mode (view);
-	selection = e_html_editor_view_get_selection (view);
-
-	ret_val = e_html_editor_view_exec_command (
-		view, E_HTML_EDITOR_VIEW_COMMAND_INSERT_NEW_LINE_IN_QUOTED_CONTENT, NULL);
-
-	if (ret_val && !html_mode) {
-		WebKitDOMElement *element;
-		WebKitDOMDocument *document;
-		WebKitDOMNode *next_sibling;
-
-		document = webkit_web_view_get_dom_document (
-			WEBKIT_WEB_VIEW (view));
-
-		element = webkit_dom_document_query_selector (
-			document, "body>br", NULL);
-
-		next_sibling = webkit_dom_node_get_next_sibling (
-			WEBKIT_DOM_NODE (element));
-
-		if (WEBKIT_DOM_IS_HTML_QUOTE_ELEMENT (next_sibling)) {
-			/* Quote content */
-			next_sibling = WEBKIT_DOM_NODE (
-				e_html_editor_view_quote_plain_text_element (
-					view, WEBKIT_DOM_ELEMENT (next_sibling)));
-			/* Renew spellcheck */
-			e_html_editor_view_force_spell_check (view);
-			/* Insert caret node on right position */
-			webkit_dom_node_insert_before (
-				webkit_dom_node_get_parent_node (
-					WEBKIT_DOM_NODE (element)),
-				e_html_editor_selection_get_caret_position_node (
-					document),
-				WEBKIT_DOM_NODE (element),
-				NULL);
-			/* Restore caret position */
-			e_html_editor_selection_restore_caret_position (
-				selection);
-		}
-	}
-
-	return ret_val;
-}
-
-static gboolean
 prevent_from_deleting_last_element_in_body (EHTMLEditorView *view)
 {
 	gboolean ret_val = FALSE;
@@ -1793,6 +1964,101 @@ prevent_from_deleting_last_element_in_body (EHTMLEditorView *view)
 }
 
 static gboolean
+change_quoted_block_to_normal (EHTMLEditorView *view)
+{
+	gint citation_level, success = FALSE;
+	WebKitDOMDocument *document;
+	WebKitDOMElement *selection_start_marker, *selection_end_marker, *block;
+
+	document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (view));
+
+	selection_start_marker = webkit_dom_document_query_selector (
+		document, "span#-x-evo-selection-start-marker", NULL);
+	selection_end_marker = webkit_dom_document_query_selector (
+		document, "span#-x-evo-selection-end-marker", NULL);
+
+	if (!selection_start_marker || !selection_end_marker)
+		return FALSE;
+
+	block = webkit_dom_node_get_parent_element (
+		WEBKIT_DOM_NODE (selection_start_marker));
+
+	citation_level = get_citation_level (
+		WEBKIT_DOM_NODE (selection_start_marker), FALSE);
+
+	if (selection_start_marker && citation_level > 0) {
+		if (element_has_class (block, "-x-evo-temp-text-wrapper"))
+			block = webkit_dom_node_get_parent_element (
+				WEBKIT_DOM_NODE (block));
+
+		if (webkit_dom_element_query_selector (
+			WEBKIT_DOM_ELEMENT (block), ".-x-evo-quoted", NULL)) {
+
+			WebKitDOMNode *prev_sibling;
+
+			webkit_dom_node_normalize (WEBKIT_DOM_NODE (block));
+
+			prev_sibling = webkit_dom_node_get_previous_sibling (
+				WEBKIT_DOM_NODE (selection_end_marker));
+
+			if (WEBKIT_DOM_IS_ELEMENT (prev_sibling))
+				success = element_has_class (
+					WEBKIT_DOM_ELEMENT (prev_sibling), "-x-evo-quoted");
+		}
+
+		if (view->priv->html_mode)
+			success = WEBKIT_DOM_IS_HTML_QUOTE_ELEMENT (
+				webkit_dom_node_get_parent_element (
+					WEBKIT_DOM_NODE (block)));
+
+		if (success) {
+			gchar *inner_html;
+			WebKitDOMElement *paragraph;
+
+			inner_html = webkit_dom_html_element_get_inner_html (
+				WEBKIT_DOM_HTML_ELEMENT (block));
+			webkit_dom_element_set_id (
+				WEBKIT_DOM_ELEMENT (block), "-x-evo-to-remove");
+
+			paragraph = insert_new_line_into_citation (view, inner_html);
+			g_free (inner_html);
+
+			if (view->priv->html_mode) {
+				webkit_dom_node_insert_before (
+					WEBKIT_DOM_NODE (paragraph),
+					WEBKIT_DOM_NODE (selection_start_marker),
+					webkit_dom_node_get_first_child (
+						WEBKIT_DOM_NODE (paragraph)),
+					NULL);
+				webkit_dom_node_insert_before (
+					WEBKIT_DOM_NODE (paragraph),
+					WEBKIT_DOM_NODE (selection_end_marker),
+					webkit_dom_node_get_first_child (
+						WEBKIT_DOM_NODE (paragraph)),
+					NULL);
+
+			}
+
+			remove_quoting_from_element (paragraph);
+			remove_wrapping_from_element (paragraph);
+
+			if (block)
+				remove_node (WEBKIT_DOM_NODE (block));
+			block = webkit_dom_document_get_element_by_id (
+				document, "-x-evo-to-remove");
+			if (block)
+				remove_node (WEBKIT_DOM_NODE (block));
+			remove_node_if_empty (
+				webkit_dom_node_get_next_sibling (
+					WEBKIT_DOM_NODE (paragraph)));
+			e_html_editor_view_force_spell_check (view);
+		}
+	}
+
+	return success;
+}
+
+static gboolean
 html_editor_view_key_press_event (GtkWidget *widget,
                                   GdkEventKey *event)
 {
@@ -1816,14 +2082,27 @@ html_editor_view_key_press_event (GtkWidget *widget,
 		 * not break the citation automatically, so we need to use
 		 * the special command to do it. */
 		if (e_html_editor_selection_is_citation (selection))
-			return insert_new_line_into_citation (view);
+			return (insert_new_line_into_citation (view, "")) ? TRUE : FALSE;
 	}
 
-	/* BackSpace in indented block decrease indent level by one */
 	if (event->keyval == GDK_KEY_BackSpace) {
 		EHTMLEditorSelection *selection;
 
 		selection = e_html_editor_view_get_selection (view);
+
+		/* BackSpace pressed in the beginning of quoted content changes
+		 * format to normal and inserts text into body */
+		if (g_strcmp0 (e_html_editor_selection_get_string (selection), "") == 0) {
+			e_html_editor_selection_save (selection);
+			if (change_quoted_block_to_normal (view)) {
+				e_html_editor_selection_restore (selection);
+				return TRUE;
+			}
+			e_html_editor_selection_restore (selection);
+		} else
+			view->priv->had_selection_before_key_press = TRUE;
+
+		/* BackSpace in indented block decrease indent level by one */
 		if (e_html_editor_selection_is_indented (selection)) {
 			WebKitDOMElement *caret;
 
@@ -1942,6 +2221,8 @@ html_editor_view_key_release_event (GtkWidget *widget,
 	range = html_editor_view_get_dom_range (view);
 	selection = e_html_editor_view_get_selection (view);
 
+	view->priv->had_selection_before_key_press = FALSE;
+
 	document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (widget));
 
 	if (view->priv->magic_smileys && view->priv->html_mode)
@@ -3001,6 +3282,7 @@ e_html_editor_view_init (EHTMLEditorView *view)
 
 	g_free (comma_separated);
 
+	view->priv->had_selection_before_key_press = FALSE;
 	view->priv->convertor_insert = FALSE;
 
 	view->priv->convertor_web_view =
@@ -3662,31 +3944,6 @@ quote_plain_text_recursive (WebKitDOMDocument *document,
 	}
 }
 
-static gint
-get_citation_level (WebKitDOMNode *node,
-                    gboolean set_plaintext_quoted)
-{
-	WebKitDOMNode *parent = node;
-	gint level = 0;
-
-	while (parent && !WEBKIT_DOM_IS_HTML_BODY_ELEMENT (parent)) {
-		if (WEBKIT_DOM_IS_HTML_QUOTE_ELEMENT (parent) &&
-		    webkit_dom_element_has_attribute (WEBKIT_DOM_ELEMENT (parent), "type")) {
-			level++;
-
-			if (set_plaintext_quoted) {
-				element_add_class (
-					WEBKIT_DOM_ELEMENT (parent),
-					"-x-evo-plaintext-quoted");
-			}
-		}
-
-		parent = webkit_dom_node_get_parent_node (parent);
-	}
-
-	return level;
-}
-
 WebKitDOMElement *
 e_html_editor_view_quote_plain_text_element (EHTMLEditorView *view,
                                              WebKitDOMElement *element)
@@ -5955,6 +6212,13 @@ e_html_editor_view_update_fonts (EHTMLEditorView *view)
 		"  color: #737373 !important;\n"
 		"}\n");
 
+	g_string_append (
+		stylesheet,
+		".-x-evo-quoted "
+		"{\n"
+		"  -webkit-user-select: none;\n"
+		"}\n");
+
 	g_string_append_printf (
 		stylesheet,
 		".-x-evo-quote-character "