From fdf1c367441b6f43b5f66a1e8581fab5d26b0b9a Mon Sep 17 00:00:00 2001
From: Duan Yao <duanyao@ustc.edu>
Date: Tue, 19 Aug 2014 10:30:43 +0800
Subject: [PATCH] Workaround chrome/webkit bug of word-spacing with leading
 spaces.

---
 src/HTMLTextLine.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/HTMLTextLine.cc b/src/HTMLTextLine.cc
index dc358d4..49e64f8 100644
--- a/src/HTMLTextLine.cc
+++ b/src/HTMLTextLine.cc
@@ -247,7 +247,11 @@ void HTMLTextLine::dump_text(ostream & out)
                     if(!(state_iter1->hash_umask & State::umask_by_id(State::WORD_SPACE_ID)))
                     {
                         double space_off = state_iter1->single_space_offset();
-                        if(std::abs(target - space_off) <= param.h_eps)
+                        if((std::abs(target - space_off) <= param.h_eps)
+                                // Chrome/webkit don't apply CSS word-spacing to leading spaces, so we don't
+                                // convert leading offsets to spaces. See also issue #412 and chromium issue #404444.
+                                // TODO after browsers having this bug have vanished, just remove the line below.
+                                && ((state_iter1->word_space == 0) || (cur_offset_iter->start_idx != 0)))
                         {
                             Unicode u = ' ';
                             writeUnicodes(out, &u, 1);