commit 045aff3d9fb35b487b6a8211a81994c5b7de8356
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date: Wed Jul 13 16:56:10 2022 +0200
Avoid duplicates in minibuffer history
The removal of duplicates is done in LastCommandsSection::add and uses
the erase-remove idiom for performance.
Most of the patch is a cleanup of GuiCommandBuffer:
* remove history_ member, that was a copy of the session lastcommands
vector. Use instead a wrapper history() around it and a addHistory
wrapper for adding new entries.
* Make sure that there is only one place where commands are added to
history. The code used to maintain a list for interactive editing,
and a list for saving the session. They could be different in terms
of leading/trailing spaces.
* [unrelated] remove command_ member, which is just a copy of
LyXAction list of commmands. Use directly lyxaction instead.
---
src/Session.cpp | 5 ++
src/Session.h | 2 +-
src/frontends/qt/GuiCommandBuffer.cpp | 72 ++++++++++++++------------------
src/frontends/qt/GuiCommandBuffer.h | 6 ---
4 files changed, 38 insertions(+), 47 deletions(-)
diff --git a/src/Session.cpp b/src/Session.cpp
index a814991..d79a5a0 100644
--- a/src/Session.cpp
+++ b/src/Session.cpp
@@ -408,6 +408,11 @@ void LastCommandsSection::setNumberOfLastCommands(unsigned
int no)
void LastCommandsSection::add(std::string const & command)
{
+ // remove traces of 'command' in history using the erase-remove idiom
+ // https://en.wikipedia.org/wiki/Erase%E2%80%93remove_idiom
+ lastcommands.erase(remove(lastcommands.begin(), lastcommands.end(),
command),
+ lastcommands.end());
+ // add it at the end of the list.
lastcommands.push_back(command);
}
diff --git a/src/Session.h b/src/Session.h
index ea51754..a433cba 100644
--- a/src/Session.h
+++ b/src/Session.h
@@ -302,7 +302,7 @@ public:
void write(std::ostream & os) const override;
/// Return lastcommands container (vector)
- LastCommands const getcommands() const { return lastcommands; }
+ LastCommands const & getcommands() const { return lastcommands; }
/** add command to lastcommands list
@param command command to add
diff --git a/src/frontends/qt/GuiCommandBuffer.cpp
b/src/frontends/qt/GuiCommandBuffer.cpp
index 956821c..4d28bfb 100644
--- a/src/frontends/qt/GuiCommandBuffer.cpp
+++ b/src/frontends/qt/GuiCommandBuffer.cpp
@@ -45,6 +45,15 @@ namespace frontend {
namespace {
+// Simple wrapper around the LastCommand session stuff.
+
+// The whole last commands list
+vector<string> const & history() { return
theSession().lastCommands().getcommands(); }
+
+// add command to the list (and remove duplicates)
+void addHistory(string const & cmd) { theSession().lastCommands().add(cmd); }
+
+
class QTempListBox : public QListWidget {
public:
QTempListBox() {
@@ -89,10 +98,6 @@ protected:
GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
: view_(view)
{
- for (auto const & name_code : lyxaction) {
- commands_.push_back(name_code.first);
- }
-
QPixmap qpup = getPixmap("images/", "up", "svgz,png");
QPixmap qpdown = getPixmap("images/", "down", "svgz,png");
@@ -141,26 +146,15 @@ GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
#endif
setFocusProxy(edit_);
- LastCommandsSection::LastCommands last_commands
- = theSession().lastCommands().getcommands();
- LastCommandsSection::LastCommands::const_iterator it
- = last_commands.begin();
- LastCommandsSection::LastCommands::const_iterator end
- = last_commands.end();
-
- upPB->setEnabled(it != end);
+ upPB->setEnabled(!history().empty());
- for(; it != end; ++it)
- history_.push_back(*it);
- history_pos_ = history_.end();
+ history_pos_ = history().end();
}
void GuiCommandBuffer::dispatch()
{
std::string const cmd = fromqstr(edit_->text());
- if (!cmd.empty())
- theSession().lastCommands().add(cmd);
DispatchResult const & dr = dispatch(cmd);
if (!dr.error()) {
view_->setFocus();
@@ -174,13 +168,13 @@ void GuiCommandBuffer::dispatch()
void GuiCommandBuffer::listHistoryUp()
{
- if (history_.size()==1) {
- edit_->setText(toqstr(history_.back()));
+ if (history().size() == 1) {
+ edit_->setText(toqstr(history().back()));
upPB->setEnabled(false);
return;
}
QPoint const & pos = upPB->mapToGlobal(QPoint(0, 0));
- showList(history_, pos, true);
+ showList(history(), pos, true);
}
@@ -208,13 +202,11 @@ void GuiCommandBuffer::showList(vector<string> const &
list,
// For some reason the scrollview's contents are larger
// than the number of actual items...
- vector<string>::const_iterator cit = list.begin();
- vector<string>::const_iterator end = list.end();
- for (; cit != end; ++cit) {
+ for (auto const & item : list) {
if (reversed)
- listBox->insertItem(0, toqstr(*cit));
+ listBox->insertItem(0, toqstr(item));
else
- listBox->addItem(toqstr(*cit));
+ listBox->addItem(toqstr(item));
}
listBox->resize(listBox->sizeHint());
@@ -249,8 +241,8 @@ void GuiCommandBuffer::up()
if (!h.empty())
edit_->setText(toqstr(h));
- upPB->setEnabled(history_pos_ != history_.begin());
- downPB->setEnabled(history_pos_ != history_.end());
+ upPB->setEnabled(history_pos_ != history().begin());
+ downPB->setEnabled(history_pos_ != history().end());
}
@@ -261,9 +253,9 @@ void GuiCommandBuffer::down()
if (!h.empty())
edit_->setText(toqstr(h));
- downPB->setEnabled(!history_.empty()
- && history_pos_ != history_.end() - 1);
- upPB->setEnabled(history_pos_ != history_.begin());
+ downPB->setEnabled(!history().empty()
+ && history_pos_ != history().end() - 1);
+ upPB->setEnabled(history_pos_ != history().begin());
}
@@ -278,7 +270,7 @@ void GuiCommandBuffer::hideParent()
string const GuiCommandBuffer::historyUp()
{
- if (history_pos_ == history_.begin())
+ if (history_pos_ == history().begin())
return string();
return *(--history_pos_);
@@ -287,9 +279,9 @@ string const GuiCommandBuffer::historyUp()
string const GuiCommandBuffer::historyDown()
{
- if (history_pos_ == history_.end())
+ if (history_pos_ == history().end())
return string();
- if (history_pos_ + 1 == history_.end())
+ if (history_pos_ + 1 == history().end())
return string();
return *(++history_pos_);
@@ -300,9 +292,9 @@ vector<string> const
GuiCommandBuffer::completions(string const & prefix, string & new_prefix)
{
vector<string> comp;
- for (auto const & cmd : commands_) {
- if (prefixIs(cmd, prefix))
- comp.push_back(cmd);
+ for (auto const & act : lyxaction) {
+ if (prefixIs(act.first, prefix))
+ comp.push_back(act.first);
}
if (comp.empty()) {
@@ -345,10 +337,10 @@ DispatchResult const & GuiCommandBuffer::dispatch(string
const & str)
return empty_dr;
}
- history_.push_back(trim(str));
- history_pos_ = history_.end();
- upPB->setEnabled(history_pos_ != history_.begin());
- downPB->setEnabled(history_pos_ != history_.end());
+ addHistory(trim(str));
+ history_pos_ = history().end();
+ upPB->setEnabled(history_pos_ != history().begin());
+ downPB->setEnabled(history_pos_ != history().end());
FuncRequest func = lyxaction.lookupFunc(str);
func.setOrigin(FuncRequest::COMMANDBUFFER);
return lyx::dispatch(func);
diff --git a/src/frontends/qt/GuiCommandBuffer.h
b/src/frontends/qt/GuiCommandBuffer.h
index 41b39d2..7228636 100644
--- a/src/frontends/qt/GuiCommandBuffer.h
+++ b/src/frontends/qt/GuiCommandBuffer.h
@@ -77,12 +77,6 @@ private:
/// dispatch a command
DispatchResult const & dispatch(std::string const & str);
- /// available command names
- std::vector<std::string> commands_;
-
- /// command history
- std::vector<std::string> history_;
-
/// current position in command history
std::vector<std::string>::const_iterator history_pos_;
--
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