From eccf5906168bda65854636a7e84c063342261999 Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Tue, 12 Feb 2013 12:58:12 +0000
Subject: Triple click selects paragraph in textarea widget.

---
 desktop/mouse.h    | 34 ++++++++++++++++++++-------------
 desktop/textarea.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+), 13 deletions(-)

diff --git a/desktop/mouse.h b/desktop/mouse.h
index 042db23a9..9a3a16702 100644
--- a/desktop/mouse.h
+++ b/desktop/mouse.h
@@ -32,8 +32,8 @@ typedef enum {
 						 * May be used to indicate
 						 * hover or end of drag. */
 
-	BROWSER_MOUSE_PRESS_1   = (1 << 0),	/* button 1 pressed */
-	BROWSER_MOUSE_PRESS_2   = (1 << 1),	/* button 2 pressed */
+	BROWSER_MOUSE_PRESS_1   = (1 <<  0),	/* button 1 pressed */
+	BROWSER_MOUSE_PRESS_2   = (1 <<  1),	/* button 2 pressed */
 
 					/* note: click meaning is different for
 					 * different front ends. On RISC OS, it
@@ -45,27 +45,35 @@ typedef enum {
 					 * is released, if the operation wasn't
 					 * a drag. */
 
-	BROWSER_MOUSE_CLICK_1   = (1 << 2),	/* button 1 clicked. */
-	BROWSER_MOUSE_CLICK_2   = (1 << 3),	/* button 2 clicked. */
+	BROWSER_MOUSE_CLICK_1   = (1 <<  2),	/* button 1 clicked. */
+	BROWSER_MOUSE_CLICK_2   = (1 <<  3),	/* button 2 clicked. */
 
-	BROWSER_MOUSE_DOUBLE_CLICK = (1 << 4),	/* button 1 double clicked */
+	BROWSER_MOUSE_DOUBLE_CLICK = (1 << 4),	/* button double clicked */
+	BROWSER_MOUSE_TRIPLE_CLICK = (1 << 5),	/* button triple clicked */
 
-	BROWSER_MOUSE_DRAG_1    = (1 << 5),	/* start of button 1 drag */
-	BROWSER_MOUSE_DRAG_2    = (1 << 6),	/* start of button 2 drag */
+					/* note: double and triple clicks are
+					 *       fired alongside a
+					 *       BROWSER_MOUSE_CLICK_[1|2]
+					 *       to indicate which button
+					 *       is used.
+					 */
 
-	BROWSER_MOUSE_DRAG_ON   = (1 << 7),	/* a drag operation was started
+	BROWSER_MOUSE_DRAG_1    = (1 <<  6),	/* start of button 1 drag */
+	BROWSER_MOUSE_DRAG_2    = (1 <<  7),	/* start of button 2 drag */
+
+	BROWSER_MOUSE_DRAG_ON   = (1 <<  8),	/* a drag operation was started
 						 * and a mouse button is still
 						 * pressed */
 
-	BROWSER_MOUSE_HOLDING_1 = (1 << 8),	/* during button 1 drag */
-	BROWSER_MOUSE_HOLDING_2 = (1 << 9),	/* during button 2 drag */
+	BROWSER_MOUSE_HOLDING_1 = (1 <<  9),	/* during button 1 drag */
+	BROWSER_MOUSE_HOLDING_2 = (1 << 10),	/* during button 2 drag */
 
 
-	BROWSER_MOUSE_MOD_1     = (1 << 10),	/* 1st modifier key pressed
+	BROWSER_MOUSE_MOD_1     = (1 << 11),	/* 1st modifier key pressed
 						 * (eg. Shift) */
-	BROWSER_MOUSE_MOD_2     = (1 << 11),	/* 2nd modifier key pressed
+	BROWSER_MOUSE_MOD_2     = (1 << 12),	/* 2nd modifier key pressed
 						 * (eg. Ctrl) */
-	BROWSER_MOUSE_MOD_3     = (1 << 12)	/* 3rd modifier key pressed
+	BROWSER_MOUSE_MOD_3     = (1 << 13)	/* 3rd modifier key pressed
 						 * (eg. Alt) */
 } browser_mouse_state;
 
diff --git a/desktop/textarea.c b/desktop/textarea.c
index a1c422202..15ef80169 100644
--- a/desktop/textarea.c
+++ b/desktop/textarea.c
@@ -257,6 +257,57 @@ static bool textarea_select_fragment(struct textarea * ta)
 }
 
 
+/**
+ * Selects paragraph, at current caret position.
+ *
+ * \param ta  textarea widget
+ * \return True on success, false otherwise
+ */
+static bool textarea_select_paragraph(struct textarea * ta)
+{
+	int caret_pos, index;
+	int sel_start = 0;
+	int sel_end = ta->show->utf8_len;
+	size_t b_start, b_end;
+
+	caret_pos = textarea_get_caret(ta);
+	if (caret_pos < 0) {
+		return false;
+	}
+
+	/* Work through text up to caret, looking for a place to start
+	 * selection */
+	for (b_start = 0, index = 0; index < caret_pos;
+			b_start = utf8_next(ta->show->data, ta->show->len,
+					    b_start),
+			index++) {
+		/* Set selection start as character after any new line found */
+		if (ta->show->data[b_start] == '\n') {
+			/* Add one to start to skip over separator */
+			sel_start = index + 1;
+		}
+	}
+
+	/* Search for end of selection */
+	for (b_end = b_start; b_end < ta->show->len;
+			b_end = utf8_next(ta->show->data, ta->show->len,
+					  b_end),
+			index++) {
+		if (ta->show->data[b_end] == '\n') {
+			sel_end = index;
+			break;
+		}
+	}
+
+	if (sel_start < sel_end) {
+		textarea_select(ta, sel_start, sel_end, false);
+		return true;
+	}
+
+	return false;
+}
+
+
 /**
  * Scrolls a textarea to make the caret visible (doesn't perform a redraw)
  *
@@ -2196,6 +2247,11 @@ bool textarea_mouse_action(struct textarea *ta, browser_mouse_state mouse,
 		textarea_set_caret_xy(ta, x, y);
 		return textarea_select_fragment(ta);
 
+	} else if (mouse & BROWSER_MOUSE_TRIPLE_CLICK) {
+		/* Select paragraph */
+		textarea_set_caret_xy(ta, x, y);
+		return textarea_select_paragraph(ta);
+
 	} else if (mouse & BROWSER_MOUSE_PRESS_1) {
 		if (!(ta->flags & TEXTAREA_READONLY)) {
 			/* Place caret */
-- 
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