CHUI-127 FIXED (Make chat field auto resizable)

- Replaced LLLineEditor with newly created LLChatEntry
- Moved some functionality (such as setting label) to the LLTextBase as it can be useful to the other derived classes

1 files changed, 198 insertions, 0 deletions

diff --git a/indra/llui/llchatentry.cpp b/indra/llui/llchatentry.cpp
new file mode 100644
index 0000000000..6f51705b90
--- /dev/null
+++ b/indra/llui/llchatentry.cpp
@@ -0,0 +1,198 @@
+/**
+ * @file llchatentry.cpp
+ * @brief LLChatEntry implementation
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llchatentry.h"
+
+static LLDefaultChildRegistry::Register<LLChatEntry> r("text_editor");
+
+LLChatEntry::LLChatEntry::Params::Params()
+:	has_history("has_history", true),
+ 	is_expandable("is_expandable", false),
+ 	expand_lines_count("expand_lines_count", 1)
+{}
+
+LLChatEntry::LLChatEntry(const Params& p)
+:	LLTextEditor(p),
+ 	mTextExpandedSignal(NULL),
+ 	mHasHistory(p.has_history),
+ 	mIsExpandable(p.is_expandable),
+ 	mExpandLinesCount(p.expand_lines_count),
+ 	mPrevLinesCount(0)
+{
+	// Initialize current history line iterator
+	mCurrentHistoryLine = mLineHistory.begin();
+
+	mAutoIndent = false;
+}
+
+LLChatEntry::~LLChatEntry()
+{
+	delete mTextExpandedSignal;
+}
+
+void LLChatEntry::draw()
+{
+	LLTextEditor::draw();
+
+	if(mIsExpandable)
+	{
+		expandText();
+	}
+}
+
+void LLChatEntry::onCommit()
+{
+	updateHistory();
+	LLTextEditor::onCommit();
+}
+
+boost::signals2::connection LLChatEntry::setTextExpandedCallback(const commit_signal_t::slot_type& cb)
+{
+	if (!mTextExpandedSignal)
+	{
+		mTextExpandedSignal = new commit_signal_t();
+	}
+	return mTextExpandedSignal->connect(cb);
+}
+
+void LLChatEntry::expandText()
+{
+	int visible_lines_count = llabs(getVisibleLines(true).first - getVisibleLines(true).second);
+	bool can_expand = getLineCount() <= mExpandLinesCount;
+
+	// true if pasted text has more lines than expand height limit and expand limit is not reached yet
+	bool text_pasted = (getLineCount() > mExpandLinesCount) && (visible_lines_count < mExpandLinesCount);
+
+	if (mIsExpandable && (can_expand || text_pasted) && getLineCount() != mPrevLinesCount)
+	{
+		int lines_height = 0;
+		if (text_pasted)
+		{
+			// text is pasted and now mLineInfoList.size() > mExpandLineCounts and mLineInfoList is not empty,
+			// so lines_height is the sum of the last 'mExpandLinesCount' lines height
+			lines_height = (mLineInfoList.end() - mExpandLinesCount)->mRect.mTop - mLineInfoList.back().mRect.mBottom;
+		}
+		else
+		{
+			lines_height = mLineInfoList.begin()->mRect.mTop - mLineInfoList.back().mRect.mBottom;
+		}
+
+		int height = mVPad * 2 +  lines_height;
+
+		LLRect doc_rect = getRect();
+		doc_rect.setOriginAndSize(doc_rect.mLeft, doc_rect.mBottom, doc_rect.getWidth(), height);
+		setShape(doc_rect);
+
+		mPrevLinesCount = getLineCount();
+
+		if (mTextExpandedSignal)
+		{
+			(*mTextExpandedSignal)(this, LLSD() );
+		}
+	}
+}
+
+// line history support
+void LLChatEntry::updateHistory()
+{
+	// On history enabled, remember committed line and
+	// reset current history line number.
+	// Be sure only to remember lines that are not empty and that are
+	// different from the last on the list.
+	if (mHasHistory && getLength())
+	{
+		// Add text to history, ignoring duplicates
+		if (mLineHistory.empty() || getText() != mLineHistory.back())
+		{
+			mLineHistory.push_back(getText());
+		}
+
+		mCurrentHistoryLine = mLineHistory.end();
+	}
+}
+
+BOOL LLChatEntry::handleSpecialKey(const KEY key, const MASK mask)
+{
+	BOOL handled = FALSE;
+
+	LLTextEditor::handleSpecialKey(key, mask);
+
+	switch(key)
+	{
+	case KEY_RETURN:
+		if (MASK_NONE == mask)
+		{
+			needsReflow();
+		}
+		break;
+
+	case KEY_UP:
+		if (mHasHistory && MASK_CONTROL == mask)
+		{
+			if (!mLineHistory.empty() && mCurrentHistoryLine > mLineHistory.begin())
+			{
+				setText(*(--mCurrentHistoryLine));
+				endOfDoc();
+			}
+			else
+			{
+				LLUI::reportBadKeystroke();
+			}
+			handled = TRUE;
+		}
+		break;
+
+	case KEY_DOWN:
+		if (mHasHistory && MASK_CONTROL == mask)
+		{
+			if (!mLineHistory.empty() && ++mCurrentHistoryLine < mLineHistory.end())
+			{
+				setText(*mCurrentHistoryLine);
+				endOfDoc();
+			}
+			else if (!mLineHistory.empty() && mCurrentHistoryLine == mLineHistory.end())
+			{
+				std::string empty("");
+				setText(empty);
+				needsReflow();
+				endOfDoc();
+			}
+			else
+			{
+				LLUI::reportBadKeystroke();
+			}
+			handled = TRUE;
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return handled;
+}