1 files changed, 257 insertions, 0 deletions
diff --git a/indra/llui/llchatentry.cpp b/indra/llui/llchatentry.cpp
new file mode 100644
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+++ b/indra/llui/llchatentry.cpp
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+/**
+ * @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 "llscrollcontainer.h"
+
+#include "llchatentry.h"
+
+static LLDefaultChildRegistry::Register<LLChatEntry> r("chat_editor");
+
+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),
+	mSingleLineMode(false),
+	mPrevExpandedLineCount(S32_MAX)
+{
+	// Initialize current history line iterator
+	mCurrentHistoryLine = mLineHistory.begin();
+
+	mAutoIndent = false;
+}
+
+LLChatEntry::~LLChatEntry()
+{
+	delete mTextExpandedSignal;
+}
+
+void LLChatEntry::draw()
+{
+	if(mIsExpandable)
+	{
+		expandText();
+	}
+
+	LLTextEditor::draw();
+}
+
+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()
+{
+	S32 line_count = mSingleLineMode ? 1 : mExpandLinesCount;
+
+	int visible_lines_count = llabs(getVisibleLines(true).first - getVisibleLines(true).second);
+	bool can_changed = getLineCount() <= line_count || line_count < mPrevExpandedLineCount ;
+	mPrevExpandedLineCount = line_count;
+
+	// true if pasted text has more lines than expand height limit and expand limit is not reached yet
+	bool text_pasted = (getLineCount() > line_count) && (visible_lines_count < line_count);
+
+	if (mIsExpandable && (can_changed || text_pasted || mSingleLineMode) && 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 'expanded_line_count' lines height
+			lines_height = (mLineInfoList.end() - line_count)->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() );
+		}
+
+		needsReflow();
+	}
+}
+
+// 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();
+	}
+}
+
+void LLChatEntry::beforeValueChange()
+{
+    if(this->getLength() == 0 && !mLabel.empty())
+    {
+        this->clearSegments();
+    }
+}
+
+void LLChatEntry::onValueChange(S32 start, S32 end)
+{
+    //Internally resetLabel() must meet a condition before it can reset the label
+    resetLabel();
+}
+
+bool LLChatEntry::useLabel()
+{
+    return !getLength() && !mLabel.empty();
+}
+
+void LLChatEntry::onFocusReceived()
+{
+
+}
+
+void LLChatEntry::onFocusLost()
+{
+
+}
+
+BOOL LLChatEntry::handleSpecialKey(const KEY key, const MASK mask)
+{
+	BOOL handled = FALSE;
+
+    // In the case of a chat entry, pressing RETURN when something is selected
+    // should NOT erase the selection (unlike a notecard, for example)
+    if (key == KEY_RETURN)
+    {
+        endOfDoc();
+        startSelection();
+        endSelection();
+    }
+
+	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() - 1) )
+			{
+				setText(*(++mCurrentHistoryLine));
+				endOfDoc();
+			}
+			else if (!mLineHistory.empty() && mCurrentHistoryLine == (mLineHistory.end() - 1) )
+			{
+				mCurrentHistoryLine++;
+				std::string empty("");
+				setText(empty);
+				needsReflow();
+				endOfDoc();
+			}
+			else
+			{
+				LLUI::reportBadKeystroke();
+			}
+			handled = TRUE;
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return handled;
+}
+
+void LLChatEntry::enableSingleLineMode(bool single_line_mode)
+{
+	if (mScroller)
+	{
+		mScroller->setSize(single_line_mode ? 0 : -1);
+	}
+
+	mSingleLineMode = single_line_mode;
+	mPrevLinesCount = -1;
+	setWordWrap(!single_line_mode);
+}